Inadequate Hot Water After Installing New Water Lines - Plumbing - DIY Home Improvement | DIYChatroom
Advertisement


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

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

Like Tree7Likes
Reply
 
Thread Tools Search this Thread
Display Modes
Old 12-17-2017, 10:02 PM   #1
Newbie
 
Join Date: Nov 2017
Posts: 14
Rewards Points: 28
Default

Inadequate hot water after installing new water lines


After tapping into the main water lines to run new lines to a new bathroom in the basement, we run out of hot water much quicker than usual. Also, the water will fluctuate between warm to hot, then back to warm until we run out of hot water completely. It seems the water heater isn't able to fully heat all the water. This is a 4-month-old gas water heater. Power vent.

I know there is/was some air left in the new water lines since I only roughed in the plumbing for the new bathroom and capped off the nipples for the fixtures. We could hear some air coming out of the faucets in other rooms in the house, but now that isn't happening anymore. I'm thinking there's still air trapped somewhere in the water lines and that's what is causing our issue with the water heater.

Thoughts?
ttsellen is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-17-2017, 10:11 PM   #2
Member
 
hkstroud's Avatar
 
Join Date: Mar 2011
Location: Virginia
Posts: 3,356
Rewards Points: 6,694
Default

Re: Inadequate hot water after installing new water lines


Quote:
I'm thinking there's still air trapped somewhere in the water lines and that's what is causing our issue with the water heater.
Nope, that's not it.

Do you by any chance have a hot water recirculation system?

What kind of pipe?
MTN REMODEL LLC likes this.
__________________
Harold,
The Left Handed Widget Maker

Last edited by hkstroud; 12-17-2017 at 10:19 PM.
hkstroud is online now   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-18-2017, 03:00 AM   #3
Newbie
 
Join Date: Nov 2017
Posts: 14
Rewards Points: 28
Default

Re: Inadequate hot water after installing new water lines


No recirculation system. We have Pex
ttsellen is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-18-2017, 05:15 AM   #4
Naildriver
 
chandler48's Avatar
 
Join Date: Jun 2017
Location: Young Harris, Georgia
Posts: 9,480
Rewards Points: 3,596
Default

Re: Inadequate hot water after installing new water lines


How long are your runs from the water heater to the furthest point and what size PEX did you use for the main runs?
__________________
Larry......
Half of Communications is Listening, and You can't Listen with your Mouth.
chandler48 is offline   Reply With Quote
Old 12-18-2017, 05:21 AM   #5
Member
 
hkstroud's Avatar
 
Join Date: Mar 2011
Location: Virginia
Posts: 3,356
Rewards Points: 6,694
Default

Re: Inadequate hot water after installing new water lines


Does your water heater have heat trap nipples?
__________________
Harold,
The Left Handed Widget Maker
hkstroud is online now   Reply With Quote
Old 12-18-2017, 07:28 AM   #6
Peace be with you
 
DR P's Avatar
 
Join Date: Dec 2017
Location: in hills of Caroline USA
Posts: 933
Rewards Points: 1,860
Default

Re: Inadequate hot water after installing new water lines


install the guts/controls into the tub/shower valve or isolate that rough in piping and problem most likely goes back away

Peace
DR P is offline   Reply With Quote
Old 12-18-2017, 07:29 AM   #7
Plumber
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: North Idaho
Posts: 11,439
Rewards Points: 258
Default

Re: Inadequate hot water after installing new water lines


If you installed a new tub/shower valve, be sure it has a cartridge inside it.
MTN REMODEL LLC likes this.
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is online now   Reply With Quote
Old 12-18-2017, 07:32 AM   #8
Newbie
 
Join Date: Nov 2017
Posts: 14
Rewards Points: 28
Default

Re: Inadequate hot water after installing new water lines


No heat trap nipples. The main runs are 3/4". The furthest point in the system is about the same as is was before I tapped into the main lines. There is an existing bathroom that has lines going further than the new bathroom lines that I ran.

I really didn't change much except trapping air into the system, but it seems that's not the culprit from what you guys are saying.

This all started immediately after I ran the new lines off of the main.
ttsellen is offline   Reply With Quote
Old 12-18-2017, 07:35 AM   #9
Newbie
 
Join Date: Nov 2017
Posts: 14
Rewards Points: 28
Default

Re: Inadequate hot water after installing new water lines


Quote:
Originally Posted by TheEplumber View Post
If you installed a new tub/shower valve, be sure it has a cartridge inside it.
I did in fact install a new Delta shower/tub valve. Don't they come with the cartridge inside already? It was the rough in kit that I installed.
ttsellen is offline   Reply With Quote
Old 12-18-2017, 07:45 AM   #10
Newbie
 
Join Date: Nov 2017
Posts: 14
Rewards Points: 28
Default

Re: Inadequate hot water after installing new water lines


Here's what I installed. Delta Faucet R10000-UNBX MultiChoice Universal Tub and Shower Valve Body

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


Thank you for all the help so far guys.
ttsellen is offline   Reply With Quote
Old 12-18-2017, 07:53 AM   #11
Plumber
 
TheEplumber's Avatar
 
Join Date: Jul 2010
Location: North Idaho
Posts: 11,439
Rewards Points: 258
Default

Re: Inadequate hot water after installing new water lines


Quote:
Originally Posted by ttsellen View Post
Here's what I installed. Delta Faucet R10000-UNBX MultiChoice Universal Tub and Shower Valve Body

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


Thank you for all the help so far guys.
Delta's cartridge comes with the trim kit.
__________________
When posting in forums, letting us know your location will help others give better feedback/advice/solutions to your questions
TheEplumber is online now   Reply With Quote
Old 12-18-2017, 08:11 AM   #12
Newbie
 
Join Date: Nov 2017
Posts: 14
Rewards Points: 28
Default

Re: Inadequate hot water after installing new water lines


Quote:
Originally Posted by TheEplumber View Post
Delta's cartridge comes with the trim kit.
Okay. Thank you! I'll order the cartridge and see if that takes care of it.
ttsellen is offline   Reply With Quote
Old 12-18-2017, 09:27 AM   #13
Member
 
ZTMAN's Avatar
 
Join Date: Feb 2015
Location: Mountain Pa
Posts: 1,963
Rewards Points: 628
Default

Re: Inadequate hot water after installing new water lines


Quote:
Originally Posted by ttsellen View Post
Here's what I installed. Delta Faucet R10000-UNBX MultiChoice Universal Tub and Shower Valve Body

https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1


Thank you for all the help so far guys.
If you look at the description of what you bought, it does not come with a cartridge. I think you have identified your problem
__________________
I don't mind spending money, I mind wasting money.
ZTMAN is offline   Reply With Quote
Old 12-18-2017, 09:44 AM   #14
Remodel and New Build GC
 
MTN REMODEL LLC's Avatar
 
Join Date: Sep 2010
Location: Colorado @ 7651'
Posts: 9,029
Rewards Points: 1,870
Default

Re: Inadequate hot water after installing new water lines


Quote:
Originally Posted by ttsellen View Post
Okay. Thank you! I'll order the cartridge and see if that takes care of it.
As HK-E figured above, just back/reverse circulating hot/cold water at your shower valve with no cartridge.
akuhn235 likes this.
__________________
Never stop learning (xcep fer speling en typeing)
MTN REMODEL LLC is online now   Reply With Quote
Old 12-20-2017, 06:12 PM   #15
Member
 
Join Date: Aug 2017
Posts: 63
Rewards Points: 126
Default

Re: Inadequate hot water after installing new water lines


sounds like a cross flow problem as stated above! Don't new water heaters typically come with check valves to avoid this problem?
akuhn235 is offline   Reply With Quote
Sponsored Links
Advertisement
 
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
Installing a Water Softener amorak Plumbing 3 05-04-2012 10:56 PM
Air in hot water lines (well system) John_H Plumbing 3 04-29-2012 10:05 PM
For stacked dryer/washer - where to locate electrical outlets and water supply lines Cliffhanger Electrical 3 09-05-2010 09:48 AM
Will water lines freeze if placed behind insulated stud wall in basement? jpsmith Remodeling 22 03-05-2009 12:23 PM




Top of Page | View New Posts