Go Back   DIY Chatroom Home Improvement Forum > Home Improvement > Plumbing

CLICK HERE AND JOIN OUR COMMUNITY TODAY...IT'S FREE!

Reply
 
Thread Tools Search this Thread Display Modes
Old 02-19-2009, 10:31 PM   #1
Newbie
 
Join Date: Feb 2009
Posts: 4
Rewards Points: 10
Default

Locate Return Recirculating Line


My 10 year old house was built with a dedicated hot water return line for a hot water recirculating system. The timered Grundfos pump is at the 75 gallon water heater. Since the water heater is just about ready to give up the ghost I am replacing it with a tankless. Because of the associated problems with tankless and recirculating, I am abandoning (removing) my my Grundfos and installing a D'mand pump at the master sink (that's the only place the recirc goes). I would like to use the return line instead of the cold line to plumb the D'mand. Where do I look to find the return line to splice into it. I have a slab construction and the copper tubing is in the slab. Would it have been common practice to stub up the two supply lines and the return line all together? In other words if I start tearing out sheetrock under the bathroom sink, is it likely that the hot and return are tee'd right there. I'm not asking for clairvoyance, just your opinion on where to start cutting.

Farmer Dean is offline   Reply With Quote
Old 02-19-2009, 10:54 PM   #2
Member
 
Join Date: Jan 2009
Location: Long Island
Posts: 348
Rewards Points: 250
Default

Locate Return Recirculating Line


some recircs use the cold water supply for their return. Do you see 3 pipes under the sink?

II Weeks is offline   Reply With Quote
Old 02-19-2009, 11:04 PM   #3
Newbie
 
Join Date: Feb 2009
Posts: 4
Rewards Points: 10
Default

Locate Return Recirculating Line


I know that my system uses a dedicated return. All I have are the two finished (valved) out supply lines (hot & cold) sticking out of the sheet rock under the sink. Logic would point to stubbing out the third (return) line right next to the hot supply so as to facilitate the finish work. After tee-ing into the hot supply, at that point you could/would 90 out of the wall under the sink to the shut off valve. Once it's sheetrocked you wouldn't see the third (return) line. At least that's how I'd do it, but then I'm not the/a builder. Where should I make the first exploratory cut?
Farmer Dean is offline   Reply With Quote
Old 02-20-2009, 07:13 AM   #4
Member
 
Join Date: Jan 2009
Location: Long Island
Posts: 348
Rewards Points: 250
Default

Locate Return Recirculating Line


without seeing it, is there a connection between the two pipes under the sink like pictured below?

If not, then how many pipes are going into and out of the boiler?
Attached Images
 
II Weeks is offline   Reply With Quote
Old 02-20-2009, 07:47 AM   #5
Newbie
 
Join Date: Feb 2009
Posts: 4
Rewards Points: 10
Default

Locate Return Recirculating Line


Nope, no exposed fittings. The utility room, at the water heater has three lines; cold, hot and hot water return,
Farmer Dean is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
question on return duct familyman HVAC 13 01-25-2009 12:05 PM
Hot Water Recirculating Line jdupre Plumbing 9 01-06-2008 08:49 AM
Help me locate a water line for my icemaker, PLEASE! curls00 Plumbing 11 07-23-2007 10:35 AM




Top of Page | View New Posts

Copyright © 2003-2014 Escalate Media. All Rights Reserved.