Best diaphragm valves according to redditors

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

1. Studor 20391 Redi-Vent Air Admittance Valve with Tubular Tee Adapter, 1-1/2-Inch Connection

1 mention
Studor 20391 Redi-Vent Air Admittance Valve with Tubular Tee Adapter, 1-1/2-Inch Connection
Compact air admittance valve with polypropylene tubular adapterIdeal for a single fixture or group of fixtures up to 20 DFUs (drain fixture units) on a branch and 24 DFUs on a stackCreates ventilation that prevents the loss of water seals in traps; uses gravity to automatically close seal and preven...
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Top Reddit comments about Diaphragm Valves:

u/stiflin ยท 1 pointr/HomeImprovement

Your problem is almost certainly a missing or blocked vent somewhere. The really correct thing thing to do is to identify what fixture isn't properly vented and is causing this negative pressure, but that could be expensive and time-consuming to even diagnose correctly.

A quicker solution that will work just as well is to purchase in-line air-admittance valves and install them under your basement sinks. This kit [https://www.amazon.com/Studor-20391-AAV-Tee-Redi-Vent/dp/B00FQEX7FK/ref=sr_1_16?ie=UTF8&qid=1487977990&sr=8-16&keywords=air+admittance+valve] should be relatively easy to install; just replace the connection from your trap to the drain on the wall with them.

AAVs can work very well and are often installed in new construction instead of full vents. They work by opening up when there's negative pressure, so air from the house is sucked in instead of the water in your traps. Under neutral or positive pressure, they stay closed, so sewer gas cannot escape. One caveat as that they need to be easily accessible so that they can be easily replaced if they fail.