Robert Perkins
New Member
I am finishing out a basement which has the drain lines for a bath, toilet, and lavatory installed, stubbed up through the slab. The drain line runs under the slab, presumably, to a sewage sump about 25 ft away. Above the sump are a drain line connecting with the main drain to the street sewer piping, and a vent which goes through the roof. I assume the drains from the lav and bath connect to the toilet drain and continue to the sump in one pipe. The layout is a typical 5' x 8' bath, with lav, toilet, and bath all on one wall.
Questions:
1. I assume I need a sewage ejector pump instead of a standard sump pump? Is 1/2 hp sufficient? Any recommended brands?
2. One of the plumbers mentioned putting a Studor valve (air admittance valve?) in the small bath. Does that mean he doesn't intend to run a vent through the engineered floor joists above to connect to the sump vent? Is an AAV sufficient for a small bath with just the three fixtures, or possibly a bar sink on the other side of the bath wall?
3. If venting to the roof is really required, is there a slope required in the horizontal run (I assume the bath side would be lower?), and can it be connected to the vent above the sump?
Thanks for your replies. I noticed in a similar thread that the replies were well thought out and answered.
Questions:
1. I assume I need a sewage ejector pump instead of a standard sump pump? Is 1/2 hp sufficient? Any recommended brands?
2. One of the plumbers mentioned putting a Studor valve (air admittance valve?) in the small bath. Does that mean he doesn't intend to run a vent through the engineered floor joists above to connect to the sump vent? Is an AAV sufficient for a small bath with just the three fixtures, or possibly a bar sink on the other side of the bath wall?
3. If venting to the roof is really required, is there a slope required in the horizontal run (I assume the bath side would be lower?), and can it be connected to the vent above the sump?
Thanks for your replies. I noticed in a similar thread that the replies were well thought out and answered.