Can someone tell me if I can tie a new shower drain line.(a second shower)
Into an existing kitchen sink drain line? The kitchen sink line runs about 25FT. To the main drain line, the shower line would be about 10ft. From the main
The kitchen line is 1 1/2" shower 2" and the main 3" schedule 30
Thanks guide

can someone tell me if I can tie a new shower drain line.(a second shower)
into an existing kitchen sink drain line?. the kitchen sink line runs about 25FT. to the main drain line, the shower line would be about 10ft. from the main
the kitchen line is 1 1/2" shower 2" and the main 3" schedule 30
thanks guide
Are you asking if this will work or if this configuration falls within code? Tom

Are you asking if this will work or if this configuration falls within code? Tom I can make it work, would it be code?
Thanks guide

"would it be code??" No, Code calls for a 2" drain to be vented not over 5' from the trap. At 10' you're way outta code. I can see why you'd want to connect to the kitchen drain but choking the flow down from 2" to 1 1/2" at the connection isn't the best of ideas. You're setting up a restriction that rotting hair matted with grease can build up as a clog. Your choicebutsince you're going to hafta vent the shower anyhow I would look for a better connection. Let me know what you decide. Tom

"would it be code??" No, Code calls for a 2" drain to be vented not over 5' from the trap. At 10' you're way outta code. I can see why you'd want to connect to the kitchen drain but choking the flow down from 2" to 1 1/2" at the connection isn't the best of ideas. You're setting up a restriction that rotting hair matted with grease can build up as a clog. Your choicebutsince you're gonna hafta vent the shower anyhow I would look for a better connection. Let me know what you decide. Tom
Tom, the shower trap& drain are in a crawl space, I could remove the 4" clean out plug where the main line goes thru the wall and use a 4x4x2" to tie into, then put the clean out plug back in. I still don't have a way of venting
The shower, could I use what they call a cheater vent by putting it in the 2" drain line with a tee? Between the drain and where it connects to the main line? in the crawl space. Thanks guide

" I could remove the 4" clean out plug where the main line goes through the wall and use a 4x4x2" to tie into, then put the clean out plug back in. I still don't have a way of venting
the shower, could I use what they call a cheater vent by puting it in the 2" drain line with a tee? Between the drain and where it connects to the main line? in the crawl space."

I fell a lot better about the layout already. You may drop the trap raiser low enough to install a 2" tee on its back in front of the trap and install a AAV(Air Admittance Valve) in the branch of the tee. The AAV must be installed upright. Just follow the directions that come with the AAV and the shower will be vented. Good luck Tom

Put the aav between the drain and the trap? Or between the trap and the main line? Thanks guide

put the aav between the drain and the trap?? or between the trap and the main line?? thanks guide

The AAV will install between the trap and the drain line. Keep the AAV elevated as high off the tee as you can to prevent any trash or debris from fouling it. Regards. Tom