One-Way Check Valve
#1
One-Way Check Valve
If you're not familiar, this Wikipedia article explains the basics of check valves:
https://en.wikipedia.org/wiki/Check_valve
The images show common examples of check valves in unpressurized and
pressurized systems. A toilet tank flush valve flapper and a water pump.
I'd like to add a check valve to a 1-1/2" sink drain. The question is, are there
check valves that will open from the flow of water going down a sink drain?
The only pressure on the mechanism would be a few ounces of water. A very
sensitive spring, ball float, or some other method I can't imagine is required.
The drain pipe is brass with chrome plating. A check valve that fits the 1-1/2"
drain would be great, but a larger diameter pvc or brass valve would be ok too.
I can build almost any kind of basic pipe adapter in my shop.
You may be wondering why I need a check valve. If you can help me find the
right valve I'll explain.
Thanks guys.
https://en.wikipedia.org/wiki/Check_valve
The images show common examples of check valves in unpressurized and
pressurized systems. A toilet tank flush valve flapper and a water pump.
I'd like to add a check valve to a 1-1/2" sink drain. The question is, are there
check valves that will open from the flow of water going down a sink drain?
The only pressure on the mechanism would be a few ounces of water. A very
sensitive spring, ball float, or some other method I can't imagine is required.
The drain pipe is brass with chrome plating. A check valve that fits the 1-1/2"
drain would be great, but a larger diameter pvc or brass valve would be ok too.
I can build almost any kind of basic pipe adapter in my shop.
You may be wondering why I need a check valve. If you can help me find the
right valve I'll explain.
Thanks guys.
#2
There are none that I'm aware of.
You'd need some type of floating ball system.
Something along this line..... Wager Co. Inc. - 2100 Mushroom Check Valve
You'd need some type of floating ball system.
Something along this line..... Wager Co. Inc. - 2100 Mushroom Check Valve
#4
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Join Date: Mar 2006
Location: Wet side of Washington state.
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With only one exception that I can think of ALL check valves are one-way. To the best of my knowledge they do not make check valves for most individual fixture drains, floor drains being the only exceptions to that I am aware of. They DO make a type of check valve for main sewer drains called a backwater valve but they are only used when there is a significant probability of a sewer running backwards.
#5
Perhaps I don't understand what you're asking for. Wouldn't a spring-check do what you're looking for? You might have to fiddle with the spring a bit to get it right. I'm sure you can get them in 1-1/2".
