35 replies to this topic

[Plane_pilot]

Were and how is the best place to put the check valve? Coming out of the pump at water level, above water level or horizontal? I have seen various way and wondered if one was better than the other.

Rick

[DrDave]

It doesn't matter where but vertical is better.

[DoDad]

Also make sure its the flapper type and not the spring type.

[DrDave]

Good point, you want gravity to work for you and the flapper type, if installed with the flow up, will allow gravity to assist in closing the valve.

[Plane_pilot]

Okay. I will have to find a flapper valve. All I have seen local is spring loaded?

[DoDad]

What size do you need?

Plane_pilot said:

Okay. I will have to find a flapper valve. All I have seen local is spring loaded?

[Plane_pilot]

2 1/2 inch

[3qtkidz]

From what I recently experienced - you best place to find a 2 1/2 inch is a plumbing supply store. (Lowes and Home Depot) did not have the flapper type in my area or the spring kind. My local plumbing supply had a huge selection of sizes. Good luck!

[Plane_pilot]

I will start calling around today to see what I can find.

Thanks!

[DoDad]

I never heard of a 2 1/2" check valve.
I only see 1" - 2 1/2" - 2" and 3"

[DrDave]

You might have better luck at 2". These are common.

[DrCase]

Are you measuring the out side of the pipe
2"sch 40 pipe is 2" on the inside and 2 1/2" on the outside

[DrDave]

Good point, not everyone knows that pipe is measured inside.

[Plane_pilot]

Yes it is 2" and I found one at the local plumbing store. Now to install.

[DrDave]

Just out of curiosity, what did it cost? I have 2 that were given to me and I have always wondered. Mine are laboratory grade with 2 flappers.