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  2. Drain-waste-vent system - Wikipedia

    en.wikipedia.org/wiki/Drain-waste-vent_system

    Air admittance valves (AAVs, or commonly referred to in the UK as Durgo valves and in the US as Studor vents and Sure-Vent®) are negative-pressure-activated, one-way mechanical valves, used in a plumbing or drainage venting system to eliminate the need for conventional pipe venting and roof penetrations.

  3. Air admittance valve - Wikipedia

    en.wikipedia.org/?title=Air_admittance_valve&...

    Retrieved from "https://en.wikipedia.org/w/index.php?title=Air_admittance_valve&oldid=309883018"

  4. Portsmouth International Airport at Pease - Wikipedia

    en.wikipedia.org/wiki/Portsmouth_International...

    Portsmouth International Airport at Pease [1] [2] (IATA: PSM, ICAO: KPSM, FAA LID: PSM), formerly known as Pease International Airport, is a joint civil and military use airport located one nautical mile (2 km) west of the central business district of Portsmouth, a city in Rockingham County, New Hampshire, United States.

  5. List of valves - Wikipedia

    en.wikipedia.org/wiki/List_of_valves

    Choke valve, Butterfly valve used to limit air intake in internal combustion engine. (Not to be confused with choke valves used in industrial flow control, above.) Clapper valve: a type of check valve used in the Siamese fire appliance to allow only one hose to be connected instead of two (the clapper valve blocks the other side from leaking out)

  6. Air-operated valve - Wikipedia

    en.wikipedia.org/wiki/Air-operated_valve

    An air-operated valve, also known as a pneumatic valve, is a type of power-operated pipe valve that uses air pressure to perform a function similar to a solenoid. As air pressure is increased, the compressed air starts to push against the piston or diaphragm walls which causes the valve to actuate.

  7. Automatic bleeding valve - Wikipedia

    en.wikipedia.org/wiki/Automatic_bleeding_valve

    Brass-bodied float valve. An automatic bleeding valve or air release valve (ARV) is a plumbing valve used to automatically release trapped air from a heating system. Air, or other gas, may collect within plumbing. For water delivery systems to taps and basins, particularly with good main supply pressure, this air is usually flushed through with ...