I am finishing out the plumbing for a basement bathroom. I had someone come do the drains for the shower, sink and stool in the floor. I am doing the above floor work. A drain that was not changed is from the utility tub that the washing machine currently drains into. I want to relocate the washing machine by about 2 feet and the current utility tub by a further 3 feet. I was going to put a 2" copper stack from about 6 inches above floor level up to about 48-50 inches for the washing machine to drain into. The concern I have is that the current drain that goes into the floor for the utility tub (which I will still tie into due to location) is 1-1/4" copper and I wonder if it is too small.
Right now, I have two choices: work with 1-1/4 copper coming out of floor, run a trap just above the floor then switch to 2" copper after the trap and y to the sink (also having it's own trap) and the washing machine stack.
The other choice may be to dig out the existing 1-1/4 and replace it with 2" but I don't know how far under the floor it goes as 1-1/4 and it could be up to 6 feet (in which case I will opt from doing it and risk it?)
My concern is the volume of a washing machine going into the pipe and if it will overflow. There will be more than a 3/4" air gap in the stack to the inlet pipe so it should vent, I am just worried about necking it down like it is.
What should I look at, or can I test it somehow before making the decision?
Thanks in advance.
Oh yeah, I live in SE Michigan.
Chris
Right now, I have two choices: work with 1-1/4 copper coming out of floor, run a trap just above the floor then switch to 2" copper after the trap and y to the sink (also having it's own trap) and the washing machine stack.
The other choice may be to dig out the existing 1-1/4 and replace it with 2" but I don't know how far under the floor it goes as 1-1/4 and it could be up to 6 feet (in which case I will opt from doing it and risk it?)
My concern is the volume of a washing machine going into the pipe and if it will overflow. There will be more than a 3/4" air gap in the stack to the inlet pipe so it should vent, I am just worried about necking it down like it is.
What should I look at, or can I test it somehow before making the decision?
Thanks in advance.
Oh yeah, I live in SE Michigan.
Chris