Piping for sump pump discharge
Piping for sump pump discharge
(OP)
I am working on a design for a sump pump discharge for the basement of a church located in southeast Pennsylvania. The pump discharge is 1 1/2" PVC. I need run the pipe a total of 175 feet to a curb side gutter. The existing grade is approximately 2% . The pipe will cross under a public alley (15 feet macadam) and through the gravel parking lot of the church (160 feet).
Ideally, the section through the gravel parking lot should be perforated to reduce the amount of water reaching the curb. Do to existing outlet, grade and curb limitations, I can only provide a little over 6" of cover. My concerns are :
1. Crushing of the pipe under traffic.
2. Freezing of the water in the pipe.
Can anyone provide me with technical assistance and product recomendations for this application ?
Ideally, the section through the gravel parking lot should be perforated to reduce the amount of water reaching the curb. Do to existing outlet, grade and curb limitations, I can only provide a little over 6" of cover. My concerns are :
1. Crushing of the pipe under traffic.
2. Freezing of the water in the pipe.
Can anyone provide me with technical assistance and product recomendations for this application ?





RE: Piping for sump pump discharge
For pipes running under vehicular loads, the ground cover is inadequate - you run the risk of having the pipes damaged without warning. Material should be ductile iron and cast in concrete if there is insufficient cover.
Hope that helps
RE: Piping for sump pump discharge
I don't think that ductile iron comes in 1-1/2" in our area at least. You may consider Schedule 80 steel with as much cover as possible.
Regarding freezing, you can remove the check valve on the main and allow it to drain back into the sump...but beware...you will need to adjust your float elevations to acccomodate the fluid draining back. That is, you don't want the pumps to fill the line, shut off, drain back, etc...
Hope this helps
RE: Piping for sump pump discharge