His car got 463 MPG and ran on fumes
John Weston’s Air/Vapor Flow System, AVFS
Literally running on vapor!
John Weston stands next to his 1992 Geo Storm GSI, which is equipped with his invention dubbed the Air Vapor Flow System. He claims the car can run 14 miles on 4 ounces of fuel, which means it runs with extreme fuel efficiency at more than 400 miles per gallon.
The Geo Storm was a sport compact car manufactured by Isuzu and sold in the United States by General Motors from 1990 through 1993 as part of GM’s Geo line of inexpensive automobiles. The same vehicles, with minor variations, were sold in Canada in the 1992 & 1993 model years only. The Storm was intended to be a budget car with the look and feel of a sports car. The GSi version from these years … included a larger 1.8 L 140 hp engine. Autoweek’s 1990 review of the storm was titled “Slick, Quick And Inexpensive”.
John Weston’s 1992 Geo Storm: “Since I changed the fuel system unit, it’s drastically different. I disconnected the fuel line from the injector so no liquid goes to the engine,” said Weston. Weston showed NBC-2 a version of his air vapor flow system where instead of liquid fuel, only vapors go to the engine. [ "run your car on vapors" ] “They used to say, ‘Hey I’m running on empty. I’m running on fumes.’ Well, this is actually running on fumes,” he said. Weston says the system burns cleaner and also made a bold claim about fuel efficiency from a one-time test. “It came up to 463 miles a gallon if we had driven in the same manner – a gallon,” said Weston. “I drove from here to Fort Myers, and I’m up there keeping up with traffic running 80 mph. ” Now, the backyard mechanic is looking for investors so he can eventually take his invention public. In the meantime, he says you might see his car on the highway.” He also put his vaporizer on a generator, a riding lawnmower, and his motorcycle. which are all so much more “fuel efficient” now! (see photos below)
By Ovidiu on July 17th, 2008
The NBC reporters were even taken on a test drive, where the engine stumbled a little bit and John said he put too much vapor on the pipe, so when he lowered the vapors, everything got back to normal.
NBC-2 relates that John Weston is waiting for investors, because he wants to sell his invention so the whole world benefits from it. . . .
“I learned that when using the AVFS [Air & Vapor Flow System] on my Geo Storm by using the standard 87 octane gasoline, then 89 octane, then used Coleman fuel(for lanterns), then charcoal lighter fluid and even rubbing alcohol. On each of the different fuels there was a different setting of the “air/vapor” mixture for the engine to run smoothly. Not only at idle, but on acceleration as well. I did NOT change timing or bypass any of the original sensors that are factory installed on our vehicles now-a-days.” – John Weston
“Based on talks with actual engineers that work at Ford and GM, these two companies have actively discouraged any improvements in fuel efficiencies. Engineers would be threatened if they were caught tinkering with the computer systems or searching for ways to make the car engines run more efficiently.”
Maybe if enough people offered to pay him to install one on their vehicle (boat? … around Port Charlotte) he could actually make some money from it, and if there is a self-serve-garage “rent-a-bay” in Port Charlotte you/he can rent for a few hours.
If not, you may need to see our do-it-yourself page:
see our post on how you can run your car on vapors
Under the hood of John’s extremely fuel efficient car
Notice the white container with about a half inch of gasoline in the bottom and an extra pipe with a valve to allow him to adjust the amount of extra air (to control the air/vapor mixture).
It can also be seen the the air filter was in the area now occupied by his vapor system. Running without an air filter may be o.k. for a while – certainly long enough to do a few test drives and measure the rate of fuel consumption, but in the long run, an air filter will be needed. (see our “Run Your Car On Vapors” page)
Front page news:
October 9, 2007
If John Weston of Port Charlotte can get investors to take his gas-saving invention to the global automotive market, it just might solve the problems of smog, global warming and the high cost of foreign oil. It also might prove that human potential is not limited by education or socioeconomic status.
Weston, 48, who dropped out of high school as a 10th-grader but later achieved a GED, claims to have invented a device that can turn virtually any car into a gas-miser that can run as far as 500 miles on a single gallon.
Called the Air Vapor Flow System, or AVFS, the device functions by vaporizing gasoline before it gets inducted into the engine. That saves fuel and reduces pollution because it allows the engine to burn more of the fuel that gets sucked into the combustion chamber, he contends. The device works on small, industrial engines or larger automobile engines regardless of whether they have carburetors or fuel injection systems, according to Weston.
Weston has been working to bring a prototype of the invention into more advanced development since the late 1990s. After encountering some financial difficulties in recent months, Weston is now renewing efforts to find investors.
. . .
“My setback has always been financial,” Weston said. “That’s why I’m totally open to sponsors, investors or purchasers.”
a small, plastic tank
The device consists of a small, plastic tank that gets mounted under the hood of a car. Some hoses from the engine’s air intake housing are run to the top of the tank so that the engine draws in vapors from above the level of the liquid gasoline.
In an impromptu demonstration conducted for this reporter last week, Weston installed one of the devices into his battered 1992 Geo Storm. Weston’s car ran well on the vapors from the device when the level of the liquid in the tank was within a certain margin. The engine ran either too rich or too lean when the level was above or below that margin. The car traveled 14.8 miles on about 4 ounces of gasoline during the test. If accurate, that would amount to about 473 miles per gallon.
Weston’s neighbor, retired construction contractor William “Pops” Gavel, said he witnessed an even more dramatic experiment conducted by Weston. Gavel said he rode as passenger in Weston’s car for 28.7 miles — from Weston’s house to a location in Englewood — on just 4 ounces of Coleman camping fuel, or white gas. If accurate, that rate would be equivalent to 918 miles per gallon. Gavel said he watched Weston pour the 4 ounces into the tank and checked the mileage on the odometer himself.
“I couldn’t believe it,” said Gavel. “I said, ‘Wire me up!’ I’ve got a Ford V-8 whacking down a gallon every 17 miles and I thought, gee, I could drive all day with that kind of mileage.”
still, very crude, manual, operation
To operate the engine, once the fuel level dropped below its optimal margin, Weston briefly triggered a home-made switch 15 times. That pumped in additional fuel from his car’s regular fuel tank. The switch was made from a lamp cord. It was triggered by pushing the two prongs of the plug together for a split second. After the test, Weston estimated the amount of gasoline consumed by measuring the amount of gasoline that was added from his car’s regular fuel tank. To do that, he again triggered the homemade switch 15 times, this time pumping fuel into a measuring cup. The fuel measured 4 ounces.
“Right now, it’s looking like a Mickey-Mouse backyard setup, but regardless of the way it looks, it functions,” he said.
Also yet to be perfected are ways to maintain the level of liquid fuel in the vapor tank, and a way to adjust the mix of air and vapor while driving.
Weston recently tested one of his AVFS tanks on a gasoline-powered utility generator. Without the device, the generator ran for 3.5 hours. With the device, it ran for 14 hours on the same amount of fuel, he said. [a 400% improvement]
School of hard knocks
Hailing from Connersville, Ind., Weston attended 23 schools in 10 grades before dropping out. He explained his father, a construction worker, moved the family often, in both Indiana and Florida. “I could not afford to take vehicles in to get repaired,” he recalled. “I could afford only to buy a Chilton’s manual and repair them myself.”
After working as a welder on oil rigs off Louisiana, he returned to Indiana to care for his ailing mother.
The breakthrough came after Weston, who routinely smokes cigarettes while working on his engines, needed to peer into the gas tank of a lawn mower engine. It was dark in the tank.
“I didn’t have a flashlight at the time, so I used a lighter,” he recalled.
Suddenly, a blast of flame blew out of the tank. Weston immediately realized the potential.
“I said, ‘Wow, let me try this,’” he said.
Weston grabbed a piece of tailpipe and stuck one into a carburetor and the other into a five-gallon gas can. The engine ran for a few moments on the vapors from the can, he said.
In 1996, a school teacher in his hometown invested $12,000 to help Weston fashion a working prototype. The teacher, Edward Slaybaugh of Connserville, Ind., said he considered the invention “the greatest boon this century.” “I hope some good comes of it,” Slaybaugh said Friday.
Reg Tech Inc.
In 1997, Weston sold the rights to his invention to Reg Tech Inc. and its subsidiary, Regi U.S., of British Columbia, Canada.
Slaybaugh said he was compensated for his investment with Reg Tech stock, which he still holds. The company is currently working to develop a lightweight rotary engine.
Weston’s deal called for the two Canadian firms to pay him $100,000 cash, $400,000 in stock, plus royalties. If the companies never turned the device into a commercial product, the company would still have to pay Weston $24,000 per year for 21 years under the contract.
The company had the AVFS tested on a small engine by the firm Adiabatics Inc. in Columbus, Ind. The results showed it reduced hydrocarbons 71 percent and carbon monoxide 25 percent. The rate of fuel consumption was reduced by 15 percent to 30 percent. But the device increased emissions of carbon dioxide 12 percent and nitrogen oxides 296 percent. Those are greenhouse and smog pollutants.
Weston said those emissions increased because Reg Tech’s engineer failed to properly adjust the vapor/air mixture. “Not all engineers are mechanics,” Weston said.
In 2002, Reg Tech relinquished the rights to the invention back to him.
John Robertson, Reg Tech president, said in a phone interview last month the company’s patent attorney had advised the firm that Weston’s invention was “unpatentable” because it was “not unique.” Apparently, a similar system may have been used in race cars in years past, Robertson said.
The company dropped the invention because it would have been unwise to invest in it without the protection of a patent, Robertson said.
“It runs, but somebody’s got to have a sophisticated testing apparatus to develop it,” he added.
the industry expresses its standard disapproval [to keep us from trying it for ourselves and discovering the truth.]
“The automotive industry has made strides in the past 10 years to make cars that produce less of such smog gases as hydrocarbons, carbon monoxide and nitrogen oxides, said Jim Kliesch, senior analyst for clean vehicles at the Union of Concerned Scientists. [no, they have fought long and hard, in the courts and in Washington, against making any improvements!]
If a vaporization device such as Weston’s improved mileage to the levels that Weston claims, that would reduce gases contributing to global warming, said Kliesch. [an open recognition that Reg Tech's testing through Adiabatics must have been flawed when claiming an increase in carbon dioxide and nitrogen]
“It sounds intriguing,” added John Cabaniss, director of environment and energy issues for the Association of International Automobile Manufacturers.
Gas-saving invention sparks memories
GREG MARTIN, Charlotte Sun staff writer; Posted October 18, 2007
NORTH PORT – A story published last week about a 48-year-old Port Charlotte man’s invention that he claims allows cars to get as much as 400 miles per gallon garnered attention from Naples to Delray Beach and beyond.
It didn’t seem all that astonishing to 78-year-old North Port retiree Peter Simmons. In fact, it brought back fond memories. After reading the story, Simmons, a retired electronic instrumentation engineer, contacted the Sun to reminisce about the early days in his distinguished career, in which he worked to reinvent a vapor carburetor similar to the Port Charlotte man’s device.
“I’m quite sure it got 120 to 150 miles per gallon,” Simmons recalled. “Those numbers I remember. They’re cast in concrete in my brain, because every time we got up to 145 mpg or better, we’d say, ‘Gee whiz!’” Simmons is one of several alternative automotive energy buffs who contacted the Sun from across Florida in response to the article published Oct. 10 in the Daily News.
The article was about John Weston, who invented the Air Vapor Flow System. The invention consists of a tank mounted under the hood of a car that vaporizes gasoline by agitation. The car runs on fumes drawn from above the level of liquid gasoline in the tank.
A “super-charged” army?
Simmons, who was born in New Zealand and raised in England, said he suspects Big Oil has kept such innovations secret to protect profits. “It is my opinion that all this stuff has been kept quiet and unknown by the poor unsuspecting public,” he said. “They’ve all been taken for the biggest ride in history. We could have been getting 100 miles per gallon.” He has held that suspicion since the early 1950s, when he worked to develop a vapor carburetor with an engineering colleague he identified as Roy Lewelling.
The two men obtained crude plans for a vapor carburetor from an advertisement in one of the amateur engineering magazines that were popular in England at the time. “The advertisements sounded like a stupid dream and a con, with promises of a complete description of a carburetor that would get fantastic mileage,” Simmons recalled.
But Simmons said he was already a believer because he’d heard a legend that the British Army, under Maj. Gen. Bernard Montgomery, had used vapor carburetors in its tanks and artillery trucks to chase Germany’s Erwin Rommel from Egypt to Tunisia during World War II. The route began with what Montgomery had dubbed “Operation Supercharge” in November 1942. “Montgomery was able to get all the way to Tunis, I think, on one refueling,” said Simmons, who served in the British Army’s engineering division after the war. …
Simmons said he and Lewelling began tinkering with the goal of creating what they dubbed the “Pogue type 2″ carburetor. It was based on the concept of the Pogue carburetor, invented by Canadian Charles Nelson Pogue in 1927. It used a radiator-like device to heat the gasoline. An article about the Pogue carburetor in the May 1936 edition of the Canadian Automotive Trade magazine carried the headline: “Prominent automotive men convinced over 200 mpg possible.”
“Really, I was the guy who handed the spanners (wrenches) to Lewelling, and offered suggestions,” Simmons quipped. Simmons said they carefully measured the mileage they achieved and he’s convinced it reached as high as 150 mpg.
The results were tempered by two caveats: it ran only on “white gasoline,” a pure form of gasoline which was not readily available except to the military, and the mileage was based on imperial gallons, which are one-sixth bigger than U.S. gallons.
After several years of development, the project was dropped in 1953. Simmons said both he and his colleague were courting their future wives at the time and chose to devote more time to their regular careers.
Simmons said he wishes Weston luck with his vapor carburetor. “I hope he succeeds, and inspires the oil industry,” he said.
Weston said he was pleased to hear about Simmons’ story. It lends credence to his own venture, he said.
“Since there was a way to get that many miles per gallon on those old cars back then, why is it so hard to believe we can’t make it work now,” he asked.
- – -
There are a number who have tinkered with innovative systems themselves.
They include Todd Mastro, owner of the Maxi Taxi business in Naples. After reading about Weston, Mastro contacted him to offer technical advice about how to make his invention more usable. He referred Weston to a technology that could automatically meter the flow of gasoline into the device, a technical difficulty for Weston.
Mastro also said he adds chemical pills purchased from Fuel Freedom International to the gas tanks of his company’s taxis to boost their mileage. The pills consist of a catalyst that helps burn gasoline in the combustion chamber, he said. Mastro said he’s convinced the pills add 5 to 15 miles per gallon to the mileage of the vehicles, which range from full-size sedans to GM’s Yukon SUV. Mastro said he became so enthusiastic about the product he now helps market it in the U.S. “I can’t shut up about this,” Mastro said. “If I’m saving money and helping the environment, I have to tell somebody.”
Richard Gargano, a business consultant from Naples, also contacted the Sun in hopes of forming a business relationship with Weston. Gargano said he represents a company that plans to build a high-tech enterprise center in south Florida. “I have associates who could be very interested in taking Weston to the next level in terms of financing him, housing him and getting this invention patented,” Gargano said.
The article also inspired inventor Gerald Rowley of Delray Beach to contact the Sun to share information about his invention, the Vapster. Rowley, who also works as a real estate appraiser, said he became an amateur mechanic because his hobby was racing go carts and dragsters. In the 1980s, he attended a seminar on the potential benefits of vaporizing gasoline, and he became hooked on the idea.
“I’ve done lots of research,” Rowley said. “I’ve studied a couple hundred patents (for vapor carburetors). The problem is turning a liquid into a gas in a way that it’s controlled.” Rowley spent many years trying to get engines to run on his device, which vaporizes gasoline by using the exhaust manifold to heat it.
Once the fuel reaches 250 degrees, it would build up enough pressure to run an engine, but the engine would run poorly, he said.
Rowley said he finally found success by accident. In frustration, he threw a rag over the air intake on a lawn mower and the engine suddenly started running well.
Rowley obtained a patent in 2003 for his device and is now looking for investors.
“I’m just a backyard mechanic,” Rowley said. “If I can get it to work, I don’t see why the large automakers can’t.”
[they are covertly, actively, suppressing it. Read about their engineers above]
You can e-mail Greg Martin at firstname.lastname@example.org.
see original story at:
from Tim Allen’s Idea Exchange; December 2007
My name is John Weston, the inventor of a fuel system called the Air/Vapor Flow System, referred to as AVFS, and would like to present this to everyone who is into automotive, energy saving systems, environment and new ideas that are a benefit to our society. Not to mention our economy, since the AVFS has been proven to get 14.8 miles on 4oz of 87octane gasoline, witnessed by Mr. Greg Martin, a reporter for the Charlotte Sun-Herald of Port Charlotte Florida.
I developed the AVFS to operate an engine on the gasoline vapors which eliminates liquid gasoline from going to the engine. This does away with any unburned fuel in the exhaust (meaning no need for the EGR system) and reduces the emissions by up to 70% and possibly even more now (since I am doing further R&D).
With the reporter riding along with me when he was doing the story on the AVFS in the local news paper, we were able to drive 14.8 miles on 4 oz. of liquid gasoline going to the AVFS tank that I had developed and adapted to the 1992 GEO Storm GSI, using the simple materials I was able to afford at the time, being some pvc tubing and fittings, some electrical conduit tubing and a plastic tank that was actually manufactured to be a tank for windshield washer fluid. That added up to be about 460 miles of driving if we had gone through a gallon of gasoline during the ride for proving that the AVFS does actually work and was being witnessed by the reporter so he would be able to be honestly writing a true story.
My reason, hopes and desires for presenting the AVFS in this manner is that perhaps someone would be willing to either come here or have me brought to his/her facility or business, regardless of small or large selection of automobiles or equipment operated by gasoline engines, and give someone the opportunity to see it function in person, on any vehicle chosen to have the AVFS adapted to, the aspects of the AVFS and perhaps present it or assist financially as a means of helping get the AVFS in use for the sake of our environment, economy, energy savings and ability to stop buying so much oil from out of our country.
I thank you for your time and efforts in reading this email and for your response and other actions.
. . .
I did file a patent registration on it before presenting it to others. Plus, being a certified paralegal helped to put together several other AGREEMENTS that are signed before others are shown the whole working of the AVFS. I am hoping this will reach some people who will be able and interested in sponsoring or investing soon. Hate to say, but am at a financial stand still currently and open for sponsorship(s) from $10.00 and up. Even small amounts help in big ways.
17481 Harris Ave.
Port Charlotte, Fl. 33948
see original post at http://ideaexchange.timallen.com/viewtopic.php?t=5315
in response to an encouraging comment about the Florida racing circuit:
Thu Dec 13, 2007
Thank you for scouting for me Hon. I have sent emails to lots of the racing circuit also. But seems they must get swamped with so much emails and takes a long while for them to get back to answering them all. I keep plugging at it every day tho. So hopefully, things will start moving along soon.
Have been hoping that Tim would catch wind of this since he is really into new ideas, energy savings and such. Am sure he will in due time (I hope) : )
Jul 17, 2008 10:36 PM
Later, the same statement, above, was posted on the care2 petition web site.
AVFSman [at] aol.com
Posted 6/23/2010 9:33 pm at http://www.f2bbs.com/bbs/show_topic/257928
Thanks for posting again. I know what you mean about others being open for trying to take the AVFS idea, soooooo, I did file a patent registration on it before presenting it to others. Plus, being a certified paralegal helped to put together several other AGREEMENTS that are signed before others are shown the whole working of the AVFS.
I am hoping this will reach some people who will be able and interested in sponsoring or investing soon. Hate to say, but am at a financial stand still currently and open for sponsorship(s) from $10.00 and up. Even small amounts help in big ways.
AVFSman, Inventor of the Air/Vapor Flow System— “AVFS”
he also mentions his patent registration at
Perhaps John will contact The Orion Project
“The Orion Project has spent over two and a half years dedicated to the search for new energy technologies that will help us move past the need for fossil fuels in powering our world.
“During this time, we have also spent many hours educating the public, politicians, business people, and world leaders on the types of systems that could supplant fossil fuels and reasons these systems are not available at this time.
“For over 100 years, these advanced concepts in energy generation have either been ignored or actively suppressed due to the power of fossil fuel based economic and industrial interests.
“The Orion Project will continue to investigate technologies that are already built AND ready for evaluation. We have an excellent team of volunteer scientists and engineers to do this initial evaluation and testing.
“At this point it has become clear that we must bring the talented scientists who wish to work with us together at one facility dedicated to this purpose. We have always felt that the most effective way to produce the true energy production breakthrough humanity requires is to have the best minds pool their knowledge and skills in a cooperative and synergistic setting. We feel this will shorten the success timeline to one to two years versus many years for those working in isolation, unprotected.
“At present, we have a growing number of eager, brilliant scientists and engineers ready to join us when we can raise the funds for a research facility. Hence, we are rededicated to raising the funds to make that a reality.
* * UPDATE * *
Thank you for your efforts in sending me the email and for putting the post about the AVFS news articles and other posts on your website. I did re-write the post on the Tim Allen site in order to update some news about the initial direction I am determined to follow through with in regard to the importance of being able to obtain energy that will drastically reduce the demand for paying the power companies as most all people, as well as businesses, are doing in order to enjoy the benefits of having electricity; along with contact information that was/is on the original posting there. I have also worked at establishing some pages on Google, GoogleGreen, Facebook and wherever I can present current details about the AVFS and my intention to bring forth freedom from the “grid” for as many people and businesses as possible.
. . .
The mystery of 100+ mpg cars, and the disappearance & deaths of men behind it,
Feel free to contact me if interested in assisting with the funds required to further the development of the AVFS by having a living and work establishment available. Until then I am unable to proceed with the progress that will become a very helpful endeavor. By and with the help of the Almighty it WILL be accomplished.
Great determination concerning the air/fuel mixture ratio. The ‘by the book’ 14.7/1 ratio will vary depending upon what TYPE of fuel is being used- any difference in the octane rating will cause the ratio to fluctuate in order to obtain a near perfect burn of all the liquid fuel that is being mixed with the air. And even that can change depending on altitude in extreme conditions such as found in aircraft with internal combustion engines. And THEN we get to the major difference of the more favorable mixture ratio when we get to mixing air with VAPOR. There is absolutely not any way to go by the book when dealing with a total different mixture, even when only mixing the air with vapors from different types of fuel (liquid). I learned that when using the AVFS on my Geo Storm by using the standard 87 octane gasoline, then 89 octane, then used Coleman fuel(for lanterns), then charcoal lighter fluid and even rubbing alcohol. On each of the different fuels there was a different setting of the “air/vapor” mixture for the engine to run smoothly. Not only at idle, but on acceleration as well. I did NOT change timing or bypass any of the original sensors that are factory installed on our vehicles now-a-days. Lets get back to the very basics of how the internal combustion engine operates and we will see what we are able to do to improve the power and acceptance of them.
Thank you for your efforts in putting news about the AVFS on your web site and/or your news publications. I have written in order to update some news about the initial direction I am determined to follow through with in regard to the importance of being able to obtain energy that will drastically reduce the demand for paying the power companies as most all people, as well as businesses, are doing in order to enjoy the benefits of having electricity; along with contact information that was/is on the original postings. I have also worked at establishing some pages on Google, Facebook and wherever I can present current details about the AVFS and my intention to bring forth freedom from the “grid” for as many people and businesses as possible.
I have been out of commission for the past five years due to a wrongful/illegal conviction/sentence for being in possession of a firearm at my home where I was sleeping 8 hours of a supposed 10 hour standoff. The fact that Indiana is a state that restores the right to bear arms if convicted of a felony (unless the conviction was domestic battery) was not accepted by the court in Charlotte County Florida where the alleged incident took place. I intend to seek an attorney or firm to bring suite against the state of Florida, etc. for the violation of the Brady Act that caused me to be incarcerated for the past five years. But because of that action, I am unable to retain any such assistance until I am able to get the AVFS situated in a profitable manner; of which I am in need of financial assistance to get accomplished also, along with obtaining a place to live. No garage or access to a place for doing any further development of the AVFS is available at this time, but will hopefully come to a prompt end so I will be able to start getting the results that WILL follow when I am able to present the difference that the AVFS makes when adapted to an engine operating generators. My intention is to keep a focus on applying the AVFS on generator applications.
… There are pictures of different applications, shown [here] … [These] pictures will establish the research I am still needing to do in regard to different size, dimensions, etc. before continuing with one particular unit package of the AVFS for use on other equipment applications. That search will also result in presenting a site (The mystery of 100+ mpg cars, and the disappearance & deaths of men behind it) that I will NOT allow to sway me in regard to continuing, even though I am the only one of the three shown who is still able to continue.
. . .
contact John directly at
John is not alone
We have now found a number of others who have created vapor fuel systems and displayed a few on our “Run your car on vapors” page. Very interesting. … They show and tell exactly how they do it.
Alternatively, for detailed instructions on how to make your vehicle run on fumes, see our page
1-1/2 inch diam. in-line valve for $15
the T fitting: 1-1/2 inch diam. = $3
1-1/2 inch diam. vinyl tubing = $3/ft
at your local hardware store