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Check Valve
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 New 1” NPT Swing Check Valve – BRONZE  US $10.99
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 Deltron Check Valve NEW 10007-10PIDC258 US $37.00
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 1/4" BSPP Female Full Ports One Way Air Check Valve US $5.49
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 1/2" Port Size One Way Air Pneumatic Check Valve LCV-15 US $21.01
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 LCV Series 1/2" Port Pneumatic Non Return Check Valve US $21.42
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 WATTS 0389309/709OSY 2-1/2" DOUBLE CHECK VALVE 160813 US $600.00
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 15/32" Male to Male Thread Air Compressor Check Valve New US $4.21
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 ZOELLER Check Valve, 1-1/4 or 1-1/2 In, Slip, PVC US $16.89
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 Parker check valve 1/2" 8F-C8L-1-B In original box US $9.99
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 3/8" Port Air Direction Control Pneumatic Check Valve US $20.22
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 Flowmatic 2" Threaded Pressure Reducing & Check Valve US $500.00
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 NEW kbi 1" PVC Glue On Check Valve for Aquarium Pool Plumbing US $8.79
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 10pcs 1/2" BSPP Female Full Ports One Way Air Check Valve US $56.99
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 LCV-06 1/8" Port Air Pneumatic Non Return Check Valve US $14.92
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 J41693 - 3/8" Back Check Valve (ejector) US $41.50
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 MCDBINJ - 1/4" Injection Check Valves (5 pack) US $42.00
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 UCINJ38 - 3/8" Injection Check Valve US $12.89
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 Crane bronze Check Valve 3/4 pipe 76E 1083329 class 300 US $88.95
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 CLOW Compact Silent Check Valve 3750-02-20010100 2" US $77.89
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 CLOW Compact Silent Check Valve 3750-02-20010100 2" US $77.89
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 1/4" Port Air Direction Control Pneumatic Check Valve US $12.19
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Here are some more information for Check Valve:
One of the more common codes that I typically see on a 1997-2001 Toyota 2.2L 4-cylinder Camry is a P0401. It is a code that indicates that there is a problem with the EGR System, not necessarily a problem the EGR valve itself. I hear stories of people pulling getting this code and replacing the EGR Valve without doing any testing because they don't know what to test. They spend needless money and still haven't fixed the problem.
There are three parts that will generally make this code appear on your car. Yes the EGR Valve is one of them, but you also have the EGR VSV, and the EGR Modulator. The first parts of inspection will be to check the function of the EGR Valve by pulling a vacuum on it with a vacuum pump. You can get a vacuum pump at and auto parts store for around $20 and even rent one at some stores.
Hook up the pump to the only vacuum port on your EGR valve. There will be a small hose attached, that you will need to disconnect and install your pump onto the same port. With the engine running at an idle you should be able to pump the vacuum pump to create vacuum on the EGR valve. The diaphragm inside the EGR Valve should raise and cause the car to die. If your car does die then your EGR Valve and it's ports are fine. If your car stumbles or doesn't have any change in the way it runs when you're pulling vacuum then you probably have a bad EGR Valve or a clogged port in your intake.
If you think you have a bad valve then you should take it off the engine and test it with the same vacuum pump. You should be able to see the diaphragm inside the valve move as you are applying vacuum. If the diaphragm does move then you may have clogged ports in your intake and may need to have the intake cleaned. If it doesn't move then you should replace the EGR Valve.
However, if your Camry stopped running when you applied that first vacuum then you should start looking to the EGR VSV. I know VS what? It's a small blue solenoid located on the back of the engine block. It will have a couple of vacuum hoses, and a small plug attached all be held up there with one 10-mm bolt. Remove the VSV and test it by applying power and ground from your cars battery (VSV should not be plugged into harness when testing.) If you hear the VSV click when you apply power then you should replace the EGR Modulator.
The EGR Modulator is located to the right of the EGR Valve above your intake. It will have several vacuum hoses coming off of it and slides into a holder. The EGR Modulator can be purchased relatively cheap at your dealer. There is no easy testing for the modulator. If you replace the modulator and still have a problem and the light comes back on, you should then replace the EGR VSV also known as the Vacuum Switching Valve. Sometimes the VSV can have an internal break and still click when you put power and ground to the terminals, but still be bad.
So you could be wasting your money by just throwing on a valve. Remember the only way to fix something right is to know the proper testing procedure so you can come to a correct fix.
Toyota Repair Videos is committed to the best information so you can learn to work on your own Toyota from home. We offer an ever increasing array of informational videos specifically for your Toyota. Check us out at http://ToyotaRepairVideos.com
Valve Maintenance Guide
1. Valves stored for future use should be examined periodically. Their machining surfaces exposed to air have to remain clean. For ball valves, ports of either side should be stuffed and stored in open position. For gate valves, globe valves and check valves, ports of either side should also be stuffed, but stored in close position. Please put the valves in the indoor cool place. Don't pile them up in mess and store outdoors.
2. Prior to installation, please check the pressure mark on the valves and see whether the port meet your application requirements. Take care of the delivery process to avoid impact that causes defections.
3. For installation, direct connect the valves to the pipeline at any position that is easy to operate and maintain. Please note that the flow direction of the medium inside globe valves goes from lower position to the higher position. Lift check valve is only allowed to install horizontally.
4. When operating ball valves, check valves and gate valves, only fully open or fully close is allowed. Don't take them as throttle valves because it will make sealing face worn by fluid, accelerating abrasion. There are back seal devices inside the gate valves and outside screw check valves. So rotating handwheel to extreme upper position can prevent the medium from leakage.
5. Use hand wheels to open and close ball valves, check valves and gate valves. Don't use leverage or other tools which may damage the components. Turn handwheel clockwise to close the valves, and turn handwheel counterclockwise to open the valves.
6. Turn the packing gland nuts evenly to avoid stem wear or tear. The stem damage will cause movement or leakage problems.
7. Always keep the valves clean during usage. The transmission screw must be lubricated periodically. When malfunction occurs, stop operating right away, figure out the problems and fix it.
About the Author
Tracey Hermans is marketing director of Valve Biz, www.valve-biz.com. Valve Biz is B2B trading portal designed for valve industry.
Why is air still in house pipes even after installing check valve on house line?
Recently added an irrigation system, both it and house use same well and holding tank. The air started after addition. Should I drain the tank. There doesn't seem to be any leaks or lack of pressure in tank gauge.
We have used a lot of house water, should I start with the farthest faucet and run and then open the others? As well as the hot water - that tank has air in it too.
draining the tank every month is necessary,, but when you added the line you also added air to the pipes,,, let the water run for a while to get the air out..
Safety Valve: Letters from readers
For open minds: I read Lois Lowry’s Newbery Award-winning book, “The Giver” over the weekend, as part of the Columbia River Families Read program sponsored by the North Central Regional Library. My kids want to attend the discussion with the author in April. The book was one of my daughter’s favorites in middle school, and my son is in the midst of reading it. As Suzanne Sage states in her March ...
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