Searching for a one way valve so I can pump my bilges really dry. Problem is that the pump outlet is 1 1/8th and I can’t find a valve to suit. All I have found are multi fit ones with 1inch and then 1 1/4 inches.
Yes that is fairly obvious but the pump gets my bilge nearly dry but then a lot flows back when the pump is stopped ( a lot of sponge fulls!!)I suggest that it will never happen. Pumping a bilge totally dry is impossible, the pump cannot pick up once some air is being drawn into its inlet. The only way is to use a sponge or cloth for the last dregs.
Yep! makes sense...... all that standing water in the discharge pipe is too much for the pump but then( second thoughts?) once the pump has re-filed the pipe isn't it having the same work to do?Suggest you read these posts before installing a check valve in the outlet hose of a "Rule" type bilge pump. Not recommended.
If you put in a non-return valve, flow-back will still happen, only more slowly!
Yep! makes sense...... all that standing water in the discharge pipe is too much for the pump but then( second thoughts?) once the pump has re-filed the pipe isn't it having the same work to do?
My old boat has a little sump from which the main bilge pump drew.This is not a ‘main’ pump just a little one sited right in the lowest part of the bilge. It is not automatic. I think I will just keep a small hand pump to pump into a bucket for the times I want to get my bilges really dry.