Pump Installation Problem

[Well Newbie]

I'm installing a new sewage pump and I noticed a round venting hole in the old pipe at the connection to the pump. Does the pump exit pipe need venting? The unit that the pump sits in has a 4" vent already. Should the hole in the exit pipe be above or below the water level? It seems that the hole will sit underwater. Help! Thanks

 

[Teets]

Venting

That hole is ok as it prevents air-locking of the pump. As long as the system has a flapper check the system should work just fine.

 

[Sponsor]

 

[Leejosepho]

Should the hole in the exit pipe be above or below the water level? It seems that the hole will sit underwater.

Mine is low enough to be under most of the time, and I believe low is best. My sump does not have a sealed lid, and a high hole would result in a sharp stream of water spraying and splashing all around and even up and out whenever the pump is running.

 

[Well Newbie]

Thanks, but now I have another question!

Should the 4" vent in the sewage room be underwater as well? Cause the plumber who installed it initially left the vent pipe below waste level. Thanks, I'm trying to get this done tonight. I have the saw out and ready to cut the vent pipe but I figured I would ask first. Thanks

 

[Leejosepho]

As far as I know, there is no need to cut that vent pipe. As the pump discharges, air will come in.

 

[Well Newbie]

Is it ok to have the (pump room) vent pipe always under water even after the pump has discharged? It seems that the vent is too low to the ground in the sewage room? Thanks

 

[Leejosepho]

Is it ok to have the (pump room) vent pipe always under water even after the pump has discharged?

No, I think not, since that leaves no place for air to go as the sump fills ... but this system had been working okay before the pump went bad?