The principles and requirements for plumbing vents can be very technical, so I'd recommend having a licensed plumber inspect and evaluate the system to determine the best and most cost-effective method to correct your specific problem. However, be aware that an AAV cannot be used for venting a sewage ejector tank. When properly installed, AAVs can be an inexpensive way to add venting in many places. If your jurisdiction allows it, you may be able to add an air admittance valve (AAV) to any plumbing fixtures that need venting.
#Sewage ejector pump venting diagram free#
I would also be sure to check the vent terminals (stack pipes) on the roof to establish that they are free from any obstructions. Determining the scope of the repair will require some investigation to ascertain the existence and adequacy of venting at all fixtures. Note 1: Where more than one drain connects to the sump, size vent on the basis of a drain. In your situation, I suspect that there is inadequate or even a total lack of venting at the ejector tank and possibly at the first-floor toilet as well. All pipe and fittings to be used on the venting system. In addition to the sewage ejector tank being vented, each of the plumbing fixtures connected to the tank must be properly vented, and all the plumbing fixtures in the remainder of the house must be correctly vented as well. The tank vent should be a dry vent that either terminates at the exterior of the house or connects to another dry vent that terminates at the exterior. The ejector tank should be vented by a connection to the top cover that's at least 1 1/2 inches in diameter, although 2-inch vent pipe is common in this application. But that shouldn't affect the traps connected to the sewage ejector tank if it's properly vented. What is the proper way to vent this system, and can I add venting to remedy this situation?Ī: Mike Casey, a licensed plumbing contractor and ICC Certified Combination Inspector in San Diego responds: Clothes washers pump out a lot of water quickly, which can put a load on the sewage ejector pump. When the washer drains and the tank pumps out, the liquid overwhelms the vent's ability to supply enough makeup air, causing a "pull" on nearby traps (mainly the first-floor toilet). I'm curious if the toilet and shower will be ok to wet vent from both the washer and the lav? Will 2 Studor vents be enough to vent all of this or should I also vent the toilet off the 4" run to it?Īny help would be greatly appreciated! I've included a rough sketch of the plan.Q: My client has a sewer ejection tank in his basement for a laundry and a half-bath. The lav and washer will each have clean outs where they break the floor along with Studor vents off of each. Then it goes to another 'Y' that runs to the lavatory and to the washer.
Off the tee is the toilet, while the main line continues to a 3" run then down to a 2" run and from there the shower connects using a 2" 'Y'. I've basically run 4" pipe off the ejector unit to a 4" tee. I know it may not be code, but is it ok to run it like this (given that I would need major renovations to run a new vent to the roof)?Īs for the basement, I plan on hooking in a washer, lav, shower & toilet. I know that this is a no-no but there is only one drain that dumps into the stack above this (upstairs bathroom lav). I plan on using an ejector pump that will be vented into my exisiting stack.
#Sewage ejector pump venting diagram install#
I'm installing a bathroom in my basement and had a couple questions:įirst though, it's a basement install where the sewer comes in half way up the wall.
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