Best automotive exhaust check valves according to redditors

We found 1 Reddit comment discussing the best automotive exhaust check valves. We ranked the 1 resulting product by number of redditors who mentioned them. Here are the top 20.

1. HydroClubUSA Inline ONE Way Check Valve 3/8 10 MM

1 mention
HydroClubUSA Inline ONE Way Check Valve 3/8 10 MM
3/8 One Way Check Valve only allows flow one wayDesigned for HHO use. Not for use as HHO torchDon't Just Buy Products Join Our Club. We Work With All Members To Get Them Results$89 includes membership to our club. Which has installation manuals along with our vehicle databaseVehicle database shows a...
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Top Reddit comments about Automotive Replacement Exhaust Check Valves:

u/DarthFaded ยท 2 pointsr/hookah

Thank you. For the copper pipe, i used two lab rubber stoppers facing the two ends together, one side to go in to the vase and the other for the bowl to fit on top. And as for the one way valve i used another rubber stopper, drilled a hole and fitted the valve. I have tested many valves and this one is the best i have come up with.

The Valve
http://www.amazon.com/INLINE-CHECK-VALVE-HYDROGEN-GENERATOR/dp/B003XXLZKA/ref=sr_1_1?s=automotive&ie=UTF8&qid=1383090155&sr=1-1&keywords=ONE+WAY+CHECK+VALVE