Go Back   EcoRenovator > Improvements > Conservation
Advanced Search

Blog Register 60+ Home Energy Saving Tips Recent Posts Search Today's Posts Mark Forums Read

Thread Tools Display Modes
Old 04-10-10, 11:19 AM   #21
Lex Parsimoniae
Xringer's Avatar
Join Date: Feb 2009
Location: Woburn, MA
Posts: 4,869
Thanks: 106
Thanked 244 Times in 224 Posts

Originally Posted by Xringer View Post

Today, (April 10, 2010) I got a reply about this Ebay item..

I apologize for the late response but our home burned down. The unit is designed for shower / tub drains, it is 18" long 1.5" drain in and out and 3/4 lines for inlets and outlets. The units is assembles from copper and is soldered. Unit is sealed in PVC and filled with foam to retain the heat. I have tested the units to 80 psi for city water pressure but not higher, I do believe they would hold 100 psi. The flow rate at 60 psi is 4.5 gpm.

- davee4089

Xringer is offline   Reply With Quote
Old 04-14-10, 02:13 PM   #22
Supreme EcoRenovator
AC_Hacker's Avatar
Join Date: Mar 2009
Location: Portland, OR
Posts: 4,002
Thanks: 303
Thanked 712 Times in 532 Posts
Default Making a Copper Coil...

Here is a scan from a book that is no longer in print:

...the picture tells the story.

The coil shown in the photo is meant to go into a chimney pipe for heat recovery, so the precise internal and external dimensions are not so critical. If the coil was intended to wrap around a waste pipe for heat recovery, the internal diameter of the coil would be critical. When wrapping such a coil, a certain amount of "spring-back" will occur, so some experimentation would be required to make a mandrel (a log in the picture) of such a diameter so that contact between the formed coil and the copper waste water pipe would happen. Then, soldering would really improve the situation.


Attached Thumbnails
Click image for larger version

Name:	make-coil.jpg
Views:	9611
Size:	59.3 KB
ID:	688  
AC_Hacker is offline   Reply With Quote
Old 01-10-12, 11:11 PM   #23
Uber Effecient
Solaris's Avatar
Join Date: Feb 2011
Location: Vancouver Island
Posts: 18
Thanks: 0
Thanked 2 Times in 2 Posts

I have a good commercial unit, and on inspection can see the copper water pipe was soldered to the copper drain pipe before starting the coil. It was wound so tight, the 1/2" copper looks pressed - with squared edges for extremely tight contact.

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
Solaris is offline   Reply With Quote
Old 10-19-13, 04:19 PM   #24
Lurking Renovator
Join Date: Oct 2013
Location: Russia, Moscow region, Dedovsk
Posts: 4
Thanks: 0
Thanked 1 Time in 1 Post

Another embodiment
Attached Thumbnails
Click image for larger version

Name:	IMAG1289.jpg
Views:	1356
Size:	76.6 KB
ID:	3510   Click image for larger version

Name:	IMAG1290.jpg
Views:	1489
Size:	71.8 KB
ID:	3511   Click image for larger version

Name:	IMAG1294.jpg
Views:	1200
Size:	200.1 KB
ID:	3512   Click image for larger version

Name:	waste water heat recovery.jpg
Views:	4505
Size:	110.9 KB
ID:	3513  
sdim is offline   Reply With Quote
The Following User Says Thank You to sdim For This Useful Post:
Piwoslaw (10-26-13)
Old 02-24-18, 05:33 PM   #25
Lurking Renovator
Join Date: Jan 2009
Posts: 4
Thanks: 0
Thanked 0 Times in 0 Posts

necro-ing, because 1/2 copper tubing was on clearance at my local Lowe's for $1.79. Just need to find some cheap copper DWV now.

Don't have enough posts for the link, search for "1/2-in dia x 20-ft L Copper L Coil" to check yours. Was only that price at one store, so ymmv.
gspong is offline   Reply With Quote
Old 02-24-18, 07:49 PM   #26
oil pan 4
Land owner
Join Date: Nov 2012
Location: NM
Posts: 1,006
Thanks: 12
Thanked 125 Times in 105 Posts

Here was my take on it.

oil pan 4 is offline   Reply With Quote

Thread Tools
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

Forum Jump

All times are GMT -5. The time now is 12:31 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Ad Management by RedTyger
Inactive Reminders By Icora Web Design