Wally Pfautz
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Hi all,
I'm adding to our DWV system, so am calculating overall sizing. I'm a little confused about drain and venting requirements for an existing sewage ejector pump which serves a 3/4 bath in our basement. The only thing I've read for sizing to plan on 2 F/Us per gal/min of flow. I don't know the Zoeller model we have, but from their website, pumps for this use have somewhere around 60-80 gal/min flow. So thats 120-160 F/Us. That relates to a 4" vent and drain requirement! The unit only has a 2" vent, and the discharge goes up with 2" pipe into a 1/4" per foot sloped 3" drain to the 4" main. Am I looking at this wrong?
My basic question is though, what number should I use for F/Us for the discharge so I can properly size the rest of the DWV system?
Thanks so much
Hazel
I'm adding to our DWV system, so am calculating overall sizing. I'm a little confused about drain and venting requirements for an existing sewage ejector pump which serves a 3/4 bath in our basement. The only thing I've read for sizing to plan on 2 F/Us per gal/min of flow. I don't know the Zoeller model we have, but from their website, pumps for this use have somewhere around 60-80 gal/min flow. So thats 120-160 F/Us. That relates to a 4" vent and drain requirement! The unit only has a 2" vent, and the discharge goes up with 2" pipe into a 1/4" per foot sloped 3" drain to the 4" main. Am I looking at this wrong?
My basic question is though, what number should I use for F/Us for the discharge so I can properly size the rest of the DWV system?
Thanks so much
Hazel