Ejector causes upstairs toilet to burp

[John Tippett]

Hi,

I have a sewage ejector in my basement. When it cuts on, one of my toilets on the floor above will go ka-blurp, and a big air bubble and splash occurs from the toilet bowl.

I have a vent at the ejector and a vent in the ejector line (the vent is located upstream of the point where the ejector line intersects the drain for the upstairs toilet). I also installed another vent...one of those valve-type vents that screws into the pipe and allows it to suck air, but prevents water from coming out. That one is located downstream of the point where the upstairs toilet connects.

Anyway, I am trying to figure out how to prevent this rather unpleasant blurp/splash. Any advice is much appreciated!

John

 

[justin_dewan90]

Has this always happened or did it just start?

 

[John Tippett]

Well, I dont rememberng it being a problem in the first years after the ejector was installed. But it has been a problem in recent years. I am just finally getting around to troubleshooting it.

I should also note this tidbit: I have a shower in that bathroom (with the blurping toilet) that I do not use. So, the water in the shower's P-trap evaporates after a few months, and I get a sewer gas smell, so I run some water to refill it. When that P-trap is empty, I do NOT get the blurping in the toilet. I presume that the air is being pushed up through the open shower trap instead of through the toilet.

Thanks.

 

[justin_dewan90]

Sounds like it's not venting properly, if the trap of the shower is empty and you get no burping but when it's full you get the burping. That'd be my first guess. Picture of the plumbing for the ejector and bathroom and where the ejector Wye in would be good.

 

[frodo]

is the vent

Hi,

I have a sewage ejector in my basement.

I have a 1 vent at the ejector and a 2 vent in the ejector line (the vent is located upstream of the point where the ejector line intersects the drain for the upstairs toilet). I also installed another vent...one of those valve-type vents that screws into the pipe and allows it to suck air, but prevents water from coming out. That one is located downstream of the point where the upstairs



John

are all these vents the ''valve type'' or do your vents to out the roof?

picture of this area of plumbing

 

[Mr_David]

I have a vent at the ejector and a vent in the ejector line (the vent is located upstream of the point where the ejector line intersects the drain for the upstairs toilet).

can you clarify?
There should not be a vent on discharge line from pump to connection to main gravity flow drain.
discharge is under pressure.
Is that vent on discharge connected to any other vents?

" I also installed another vent...one of those valve-type vents that screws into the pipe and allows it to suck air, but prevents water from coming out. That one is located downstream of the point where the upstairs toilet connects. "

And why did you install that? ^

could be your connection to main drain is to close to toilet and the toilet should be vented upstream of the discharge connection

 

[frodo]

can you clarify?
There should not be a vent on discharge line from pump to connection to main gravity flow drain.
discharge is under pressure.
Is that vent on discharge connected to any other vents?

" I also installed another vent...one of those valve-type vents that screws into the pipe and allows it to suck air, but prevents water from coming out. That one is located downstream of the point where the upstairs toilet connects. "

And why did you install that? ^

could be your connection to main drain is to close to toilet and the toilet should be vented upstream of the discharge connection

i cant answer these questions with out a picture of what is going on