Where is it better to 'T' into the pipes in the basement. The kitchen will have a dishwasher and sinks that will use a holding tank containing a pump. Every thing has to be within 10 feet to not strain the pump. I'm worried about the position of the piping being down stream from an upstairs tiolet. We could directly 'T' into the 4" between the toilet and the tub or come into the smaller pipe with the tub. My concerns are if we 'T' into the big pipe , will we get toilet waste comiang down the pipe or if we 'T' into the tub pipe, will we pump the kitchen waste water up into the tub?

Any help here appreciated, Thanks Boots

Where is it better to 'T' into the pipes in the basement. The kitchen will have a dishwasher and sinks that will use a holding tank containing a pump. Every thing has to be within 10 feet to not strain the pump. I'm worried about the position of the piping being down stream from an upstairs tiolet. We could directly 'T' into the 4" inbetween the toilet and the tub or come into the smaller pipe with the tub. My concerns are if we 'T' into the big pipe , will we get toilet waste comiang down the pipe or if we 'T' into the tub pipe, will we pump the kitchen waste water up into the tub?

Any help here appreciated, Thanks Boots

Hi Boots,

While you have your layout in your minds eye you must realize that I don't.
The kitchen? Is it in the basement and the toilet and tub on the first floor?
You won't use a Tee to connect the pipe from the pump to the sewer. Instead use a Wye or a Combo, (combination wye and eighth bend) to make the tie in. I hope you plan on at least a 2" drain and refrain from installing a disposal in the sink. Using the fittings I recommended instead of a tee will remove the fear of connecting downstream from the first floor toilet. I can't remark on the tub tie in since you failed to inform me of how far away the tie in point will be from the tubs trap. If it's next to it then I would go with the 4" connection. Good luck, Tom

Hi Boots,

While you have your layout in your minds eye you must realize that I don't.
The kitchen? Is it in the basement and the toilet and tub on the first floor?
You won't use a Tee to connect the pipe from the pump to the sewer. Instead use a Wye or a Combo, (combination wye and eighth bend) to make the tie in. I hope you plan on at least a 2" drain and refrain from installing a disposal in the sink. Using the fittings I recommended instead of a tee will remove the fear of connecting downstream from the first floor toilet. I can't remark on the tub tie in since you failed to inform me of how far away the tie in point will be from the tubs trap. If it's next to it then I would go with the 4" connection. Good luck, Tom

Thanks for the quick response!! That's awesome!

I wish I could post a picture but I will do my best to describe the existing pipes. Sorry for describing the 'Y' as a 'T'.
Main line looks like this
Toilet'flange' ----2ft------upstairs kitchen'Y'from left-----2ft-----tub'Y' from right

The tub drain hole is 3 ft from the 'Y' at the main. Could we 'Y' into the tub pipe(2") at 1ft from the main. I was thinking we should bring the 7ft rise above the 2" on an angle and then into the tub pipe.
My worry about going in on the main is the 7ft drop to the pump housing down stream from the pooper. Plus as the upstairs kitchen and bath 'Y's are from different directions through the joist there is no room to move and will need a rubber expansion joint/clamp. So will the other but I am a little more comfortable with that one.

Again Thanks for all you help, Boots















Thanks for any advice, Boots

Here is a pic if it helps...

If you keep the elbos to a minimum and the tub drain line doesn't clog up to produce backpressure I think you'll be OK with connecting to the tubs drain line. How are you venting the holding tank and the basement sink? They both have to be vented you know. Regards, Tom

It worked great, and I don't have to worry about anything coming back up the pipe... forgot to tell the 7 year old not to flush the toilet... pipes were cut and it went right on by... PHEW!! LOL
Right now the vent hole on the pump is just open. The pump is directly under the sinks. We are going to have to make another hole in the wall to go to outside as the original vent is behind a wall that I don't want to destroy.
Your help has been invaluable!!

PS: I have to ask about your avatar... you? Your wife? Your mistress? Your boss? Or just wishfull thinking? LOL

PS: I have to ask about your avatar...you? your wife? your mistress? your boss? or just wishfull thinking? LOL
On another note thanks for remarking on my avatar. That's Teresa Marie, my best friend and companion for the last 12 years. She is a model and former dancer that still does photoshoots. She excises and works out daily and just turned 56 the 13th of last month. Pretty foxey for 56 huh? Regards, tom