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I assume this means I will have to run a new vent through the roof for the basement bath. One vent is located near the kitchen/laundry, and one each near the two existing bathrooms on the main floor. I don't believe my house has a main vent stack as it appears there are 3 separate vents through the roof. My plan is to tie that vent back into the vent for the ejector pit in the basement ceiling and then run a vertical vent up through a chase into the attic and out the roof eventually. Based on extensively searching through many posts on these forums I have managed to put together what I think is the correct way to finish the DWV piping for this setup using a group vent that tees off where the vanity sink will connect to the 2" stub. About 10' away I have a pit for a sewage ejector pump. What I have is three stubs coming out of the slab, a 2" stub where a vanity sink would go, a 4" stub where a toilet would go and a 1-1/2" stub where a tub/shower would go. The basement has been plumbed (to some extent) for a bathroom underneath the slab. So do I use 160 DFU to also figure the ejector vent size in table 7.5? That would put it at a 4” vent but everything I’ve seen shows a 2” vent for an ejector basin.I have a 2 yr old house that had an unfinished basement when we bought it. So that would be about 160 dfu.īecause of that I'm planning on running the discharge line all the way over to my 4" main drain line rather than a closer 3" drain line. At my head pressure (10 ft) it looks like most small pumps are closer to 80 gpm. I've looked around and haven't found an ejector pump that small though. So the ejector pump would be minimum of 40 DFU if it was at the minimum of 20 gpm. Such as from a pump, sump ejector, air conditioning equipment, or similar device, two (2) fixture units shall be allowed for each gal1on per minute (3.78 Less than 20 ga11ons per minute (75.7 Lim).ħ02.3 For a continuous flow into a drainage system, The discharge of water closets or urinals:ħ10.3.1 Shall A sewage ejector or sewage pump receiving.But for the ejector basin vent it looks like these sections apply: For just the lav wet vent a 2" vent is plenty (lav (1) and WC(3) totals just 4 DFU). Thanks Eplummer, I'm glad you brought up vent sizing because I hadn't thought about the impact of the pump on that. Vent from an air-operating sewage ejector shall combine
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Total number of fixtures discharging into the sump. The vent, after leaving the sump, is combined with ventsįrom fixtures discharging into the sump, the size of theĬombined vent need not exceed that required for the When the foregoing requirements are met and Nor less than one and one-half (1-1/2) inches (40 mm) inĭiameter. Number and type of fixtures discharging into the sump, Less in size than that required by Table 7-5 for the Normal operating conditions and, in no case, shall be Maintain atmospheric pressure within the sump under all Through the roof or, when permitted, may be combined Provided with a vent pipe that shall extend separately
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Manhole or equivalent opening to permit access for With substantial covers having a bolt-and-gasket type UPC 710.10 Sumps and receiving tanks shall be provided But your area may want the separate vent.Ĭheck out the bold print in the code reference below:īTW- per table 7-5 you will need a 2" vent because of your toilet. It would be best for you to call your inspector.