Purging Hot Water Risers To Baths - Plumbing - DIY Home Improvement | DIYChatroom


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

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

Reply
 
Thread Tools Display Modes
Old 03-18-2012, 01:47 PM   #1
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,630
Rewards Points: 2,000
Default

purging hot water risers to baths


saw "Ask This Old House" segment on this problem of running the hot water for showers and sinks taking 2-3 minutes to get hot water up there.old HWH was in the middle of the basement directly under the baths upstairs 1/2"...new tankless was installed on a basement wall and vented out on the gas and the contractor went to 3/4" copper on the hot water out.basiclly the pump (115V) is installed under a sink and pushing of a button sends the COOL water on the HOT water riser right over into the true cold side and a sensor shuts the pump off when it feels hot water at the pump...so the purge is complete and HOT water is upstairs...my question can a pump actually push the riser cooler water into the cold side of the house?? anybody try this might catch a video of it will add to this...the This Old House Plumber gut Rich T.did it so his word is GOD or what!

Advertisement

biggles is offline   Reply With Quote
Old 03-18-2012, 03:06 PM   #2
Member
 
Join Date: Jan 2012
Location: ohio
Posts: 1,122
Rewards Points: 552
Default

purging hot water risers to baths


i have not but watts backs a system like that. here is link.
http://www.watts.com/pages/_products...s.asp?pid=6677

Advertisement

__________________
"be careful at listening to just one persons advise" said me
"be careful at listening to just one persons advise" said myself
p.s. not all i say is a fact but not all i say is my opinion.
jaydevries is offline   Reply With Quote
Old 03-18-2012, 04:58 PM   #3
Member
 
biggles's Avatar
 
Join Date: Jan 2008
Location: Long Island
Posts: 3,630
Rewards Points: 2,000
Default

purging hot water risers to baths


just wondering how the pump sends the cooler water into the col water side against the pressure there.found that show it's up on my newer thread on the hot water up top

Last edited by biggles; 03-18-2012 at 05:12 PM.
biggles is offline   Reply With Quote
Old 03-18-2012, 05:22 PM   #4
GC/Master Plumber/Mech
 
Join Date: Feb 2009
Location: Hays, KS
Posts: 1,472
Rewards Points: 504
Default

purging hot water risers to baths


Quote:
Originally Posted by jaydevries View Post
i have not but watts backs a system like that. here is link.
http://www.watts.com/pages/_products...s.asp?pid=6677
So you think that this could be used on a tankless WH?
__________________
John Wayne once said "Life is tough and it is even tougher if you are stupid"

Tempstar and Trane Dealer
Plumber101 is offline   Reply With Quote
Old 03-18-2012, 05:57 PM   #5
Master Plumber
 
Javiles's Avatar
 
Join Date: Dec 2011
Location: Miami Florida
Posts: 1,465
Rewards Points: 718
Default

purging hot water risers to baths


In theory it should work with an aquastat only problem is that water heater would be working to keep that water at the preset temperature defeating the supposed purpose of a tank less unit.
__________________


Experience is Knowing what to do next, Skill is knowing how to do it

http://www.americandrain.net
Javiles is offline   Reply With Quote
Old 03-18-2012, 06:05 PM   #6
A "Handy Husband"
 
rjniles's Avatar
 
Join Date: Feb 2007
Location: South Carolina Low Country
Posts: 4,231
Rewards Points: 2,372
Default

purging hot water risers to baths


I have this system in my 80 foot ranch style house. WH in garage, master bath at opposite end of house. Pump is in crawl space under bath. Button on side of vanity. Push button and 45 seconds later -- Tada -- hot water. Plumbing is 3/4 inch PEX between garage and bath.
Works great.
__________________
Location:
Coastal South Carolina
rjniles is online now   Reply With Quote
Old 03-19-2012, 09:36 AM   #7
Member
 
Join Date: Nov 2007
Location: Nashua, NH, USA
Posts: 6,976
Rewards Points: 2,048
Default

purging hot water risers to baths


When all the water faucets are turned off while the main valve is still on, the pressure everywhere in the system is the same.

Also at that time it is possible to pump water in either direction around any loop (without check valves) that may exist in the plumbing system in without running against pressure.

If a faucet is on while a recirculating pump is in action, water to be recirculated may go out the faucet instead of going around the loop. Alternatively some incoming water may go around the loop in the same direction the pump is pushing instead of opposing the recirculation. Exactly what happens depends on how far the faucet is opened compared the gallons per minute rating of the pump.

Advertisement

__________________
Forget super sized fries. The Washington Redskins could promote healthy eating with First Lady Obama by choosing a (red skinned) turnip for a mascot.

Last edited by AllanJ; 03-19-2012 at 09:53 AM.
AllanJ is offline   Reply With Quote
Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Grossly insufficient water supply to toilet wasting water? mysterylectric Plumbing 8 01-17-2012 12:19 PM
Need advice RE: purging air from baseboard hot water heating system mikenri HVAC 2 01-19-2011 08:17 PM
Cold water is warm - hot water leak under slab? Homerepairguy Plumbing 9 10-13-2010 09:17 PM
Oil fired furnace and hot water heater question steveinpa Plumbing 3 08-10-2010 09:42 AM
How Do I Properly Shock Chlorinate a Water Softner classicflytyer Plumbing 5 07-14-2009 01:15 AM




Top of Page | View New Posts