Check Valve Price

check valve
A valve that closes to prevent backward flow of liquid
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.
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 mechanical device in a pipe that permits the flow of water or air in one direction only.

price
monetary value: the property of having material worth (often indicated by the amount of money something would bring if sold); "the fluctuating monetary value of gold and silver"; "he puts a high price on his services"; "he couldn't calculate the cost of the collection"
Decide the amount required as payment for (something offered for sale)
the amount of money needed to purchase something; "the price of gasoline"; "he got his new car on excellent terms"; "how much is the damage?"
determine the price of; "The grocer priced his wares high"