Home>Discussions>PLUMBING>Adding laundry sink, need advice for drain. Much appreciated!
4 posts / 0 new
Last post
Zai
Adding laundry sink, need advice for drain. Much appreciated!
Zai

Hi All,

First - thank you in advance for your reply!

I am adding a laundry sink and wanted to get some advice on how I can add the drain into the existing washer drain pipe. The standpipe for the washer drain has a trap close to the floor that connects to the big drain pipe for the house. I added a picture and a diagram to help explain. 

My questions:
- Is the pipe in the middle the vent pipe? I'm not really sure about this, but the pipe goes up to the ceiling
- Where can I add the new drain pipe from the laundry sink? Can I add it to point (a) as in the diagram? Or do I need to add it to somewhere like point (b)?
- Do I still need a p-trap for the laundry sink if I can connect at point (a)? since there is a trap already downstream.

Thank you again!

Attachment: 
Jack
Re: Adding laundry sink, need advice for drain. Much...
Jack

I would say you can tie into (a), but I don't think you need a trap at the sink, you alrady have one on the washer drain. Ypu would want to use a  wye rather than a "T" fitting.

[IMG]https://images.homedepot-static.com/productImages/e9e24ad4-d858-4557-b7b...

 

Jack

Jack
Re: Adding laundry sink, need advice for drain. Much...
Jack
JLMCDANIEL wrote:

I would say you can tie into (a), but I don't think you need a trap at the sink, you alrady have one on the washer drain. Ypu would want to use a  wye rather than a "T" fitting.

[IMG]https://images.homedepot-static.com/productImages/e9e24ad4-d858-4557-b7b...

 

Jack

Zai
Re: Adding laundry sink, need advice for drain. Much...
Zai
JLMCDANIEL wrote:

I would say you can tie into (a), but I don't think you need a trap at the sink, you alrady have one on the washer drain. Ypu would want to use a  wye rather than a "T" fitting.

[IMG]https://images.homedepot-static.com/productImages/e9e24ad4-d858-4557-b7b..

Jack

Thank you, Jack. I wasn't really sure if I needed the sink to have it's own trap to be up to code but I'm just looking for the simplest solution for now, so I'm glad you agreed. Thanks for the link to the wye fitting as well!

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.