BACKWATER CHECK VALVE. DIAPHRAGM VALVE DRAWING.

Backwater Check Valve

check valve
A check valve, clack valve, non-return valve or one-way valve is a mechanical device, a valve, which normally allows fluid (liquid or gas) to flow through it in only one direction.
A valve that closes to prevent backward flow of liquid
A mechanical device in a pipe that permits the flow of water or air in one direction only.
Limits the flow of gas to one direction only. Use a check valve between the bubbler and generator to prevent unwanted pressure build up in the generator, and a safety against a low level bubbler. A check valve, such as used on torches, is recommended.

backwater
An isolated or peaceful place
a body of water that was created by a flood or tide or by being held or forced back by a dam; "the bayous and backwaters are breeding grounds for mosquitos"
Before and After Science is the fifth studio album by British musician Brian Eno. Produced by Eno and Rhett Davies, it was originally released by Polydor Records in December 1977. Unlike Eno's previous albums which were written and recorded quickly, the album took over two years to complete.
A part of a river not reached by the current, where the water is stagnant
A place or condition in which no development or progress is taking place
a place or condition in which no development or progress is occurring; "the country is an economic backwater"

Backwaters Backwater
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