RolHammer
New Member
Plumbing noob here with a first time post.
My sump pump packed it in and I'm replacing it with both a new unit as well as a battery backup unit.
Now, I notice that the old pump didn't have a check valve. Clearly, this is a violation of the orthodox 'a check valve is needed to prevent the water from running back into the sump' rule. I'll be adding a check valve in front of each pump as part of this but am curious: what happens to that water that's standing on top of the check valve(s) after the last rain has fallen and temperatures turn toward freezing?
I see the point of having the check valve in the first place but wonder about those couple of gallons sitting in the pipe. I've searched around online and don't really see the issue discussed much. So, I'll be drilling the usual relief hole just below the check valve to prevent airlocking and am wondering if a similar small hole just above the check valve might address the other concern. What have others done?
My sump pump packed it in and I'm replacing it with both a new unit as well as a battery backup unit.
Now, I notice that the old pump didn't have a check valve. Clearly, this is a violation of the orthodox 'a check valve is needed to prevent the water from running back into the sump' rule. I'll be adding a check valve in front of each pump as part of this but am curious: what happens to that water that's standing on top of the check valve(s) after the last rain has fallen and temperatures turn toward freezing?
I see the point of having the check valve in the first place but wonder about those couple of gallons sitting in the pipe. I've searched around online and don't really see the issue discussed much. So, I'll be drilling the usual relief hole just below the check valve to prevent airlocking and am wondering if a similar small hole just above the check valve might address the other concern. What have others done?