The valves are very sturdy and work as they should.

The valves are very sturdy and work as they should.  Read Less

Nicely made, not too large in outside dimensions.

Nicely made, not too large in outside dimensions.  Read Less

No air appears to leak when the valve is off and air pressure is up.

No air appears to leak when the valve is off and air pressure is up.  Read Less

Third re-edit:after the first two reviews that were misleads based on what i think the "true" quirk is1st: very directional sea...  Read More

Third re-edit:after the first two reviews that were misleads based on what i think the "true" quirk is1st: very directional sealing2nd:just doesn't hold pressure reliablynow i believe the true "issue" is that i wasn't using a pneumatic system with slightly atomized compressor oil in the tankthe o-rings inside these valves only work when a small amount of an oil is soaking themwhen i used a hydrocarbon lpg variant through them it leached out the natural rubber oils and damaged one when i passed liquid butane through it during shutoffonce i noticed a benefit from dipping the rubber parts into an oil and giving a light rinse after i tried oiling one that was leaking pure filtered water at a rate well above anything you would "ignore" till you had money to replace the faulty valve it stopped leaking at alli used olive oil cause it was the only non-spraycan oil i had handy and so in a few months a good clean and re-oil will be needed if not before then i urge consumers and the manufacturer to point out the need for oiling the seals occasionally in non-pneumatic (with compressor oil) scenariosthis might be a cause of bad reviews on a lot of valves for pneumatic use as they tend to use buna-n o-rings that benefit from an atomic level of oil in the gas stream and will suffer pressure sealing issues if a chemical that might wash away oils is usedoil them occasionally and the seals will praise you, neglect them and they will flood your home or fill it with explosive levels of lpg gases or soak your beams till they rot awayhappy diy part shopping future consumer reading this  Read Less

These are pretty inexpensive and i have no problems with leaks.

These are pretty inexpensive and i have no problems with leaks.  Read Less

Eliminated the high cost of airlift double gauges.

Eliminated the high cost of airlift double gauges.  Read Less