They allow a urinal flushometer to be converted from manual to automatic operation for hands-free flushing
Bradley S07-062A Air Valve Assy - Thru Valve Replacement Part
Fits 2" drain line
Leakproof molded plastic receptacle makes maintenance of product easy
general storage of chemical drums and portable drum pumping stations
Apollo Check Valve, 1 1/4 in, Single, Inline Swing, Bronze, Press x Press - 61YLF206T1PR Mount Type-Counter Mount They allow a urinal flushometerLow Lead Bronze Swing Check Valves, Max. pressure: 200 psi Max. temp.: 250F,Designed for direct mechanical connection to ASTM B88 Type K, L, and M hard drawn copper tubing. PTFE seats. Press connection. Not for use with reciprocating pumps and similar applications. Not suitable for flammable gas or steam service. Can be mounted vertically or horizontally.,Meet NSF ANSI 61 8 (2010) Annex F and G, and MSS SP139.