Take the 2-minute tour ×
Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. It's 100% free, no registration required.

I currently have a washing machine and dryer in the basement and wish to move them both upstairs. I can tap into the same drain line, but it will be about 20' from the old p-trap. Should I install a new p-trap upstairs and take the old one out, or can I have 2 in the same line, or is the one in the basement sufficient?

Also there is no vent in the basement for this drain line just a p-trap and about 3' of pipe sticking up; will I need a vent now that I am moving it upstairs?

share|improve this question
add comment

1 Answer 1

Ideally, you should move the P-trap upstairs, and vent through the roof. Under no circumstances should you have two p-traps in one line. You get an air-lock between the two, and funny stuff happens.

You want something like this: enter image description here

share|improve this answer
1  
Awesome. I'd like to see Google Sketchup do that! –  Kaz Apr 2 '13 at 0:17
add comment

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.