AQUANEAT Aquarium 1 Way Thread Valves, Air Flow Control Valves, Manifolds Distributor for Pumps Fish Room Air Systems,20pcs

So much better value than trying to buy these at your local fish shop.

Ordered three packs just in case one broke. I have not had one break. I use a 3/16 bit. I do not believe there is any leaks. Nothing was add to seal the valve. Just screwed into pvc. Have to use a drill, you will be there for ever if you try to do it by hand.

Used for home made hydroponic set up. Handles water and air.

They are pretty decent air valves. I recently installed 40 of them while moving my fishroom. They don't feel as well made as the AV1E available from Jehmco (for example, the levers aren't attached well, and during installation one fell off and I expect more will do the same over time).

Muy bueno para lo que se usa

Very nice holding up so far

I've been using these for a few months now with my shrimp rack, and I just upgraded to a larger centralized air pump. I have yet to have any problems with these valves. A 3/16" drill bit does the job for drilling holes in the PVC, and then just put the hose part of the valve in the chuck and screw it in. I haven't had any leaks and was able to reuse 100% of the valves when I switched to a bigger system. Will definitely be ordering more of these as the fish room grows.

Well made valves.