Grinder pump vs. sewage pump for ejector pit

[Brian Jordan]

Hi, I am adding a basement half bath that will be plumbed to an existing ejector pit. The existing (old) pump is connected to the main sewer with a 1.5" pipe and about 7 feet of head. The old pump only had to deal with graywater (utility sink & floor drain for furnace & AC condensation), so a new pump is required. We are connected to a municipal sewage system.

A sewage pump seems to be the obvious choice, but requires 2" piping. This requires cutting the 4" main drain to add a new 2" wye. A "socket saver' might work, but space is pretty tight as the main 4" horizontal drain is up in the ceiling joists.

Would a "residential" grinder pump be a be a better solution? The Zoeller model 803 "shark" has a 1.25" discharge that would easily connect to the existing plumbing.

I'm aware that grinder pumps cost more, but that is offset by not requiring a full discharge re-pipe.

Thanks!
-Brian

 

[Tuttles Revenge]

Both pumps work for their intended purpose. I have a sewage ejector that has been replaced recently after more than 20yrs of service. A grinder pump will allow you to not change the tie in connection. So the trade off is save cash but spend time or save time and spend the cash. If I had the cash, I would go with the grinder pump and spend my time doing something enjoyable.