Plumbing Forum - Professional & DIY Plumbing Forum > General Plumbing Discussion > General Plumbing Help > Freezing/Scalding showers



Reply
 
Thread Tools Display Modes
Old 03-03-2011, 03:30 PM   #1
Jayhawk
Junior Member
 
Join Date: Mar 2011
Location: Topeka, KS
Posts: 4
Default Freezing/Scalding showers

This is a problem we've dealt with but it's annoying and I want to fix it. We have a 15 year old (we've owned it for a couple of years), somewhat upscale for our area, 3.5 bath home with an issue I've never had before. When one shower is in use, and someone turns on water, flushes a toilet, etc., the water in the shower either goes colder or hotter. Is this a case of the builder using cheap valves, and they need to be replaced to fix the problem? We'll have to open walls to get at them, but I'm perfectly willing to do that if we can make this go away. Thanks for your help.



__________________
Jayhawk is offline  
 
Reply With Quote Quick reply to this message
Old 03-03-2011, 05:03 PM   #2
SlowDrip
Plumbing Sales
 
SlowDrip's Avatar
 
Join Date: Nov 2010
Location: Oshawa, Ontario
Posts: 395
Liked 1 Times on 1 Posts

Default

Yes, your house lacks anti-scald valves which are now code. Replacing them will fix your problem.



__________________
SlowDrip is offline  
 
Reply With Quote Quick reply to this message
Old 03-03-2011, 10:44 PM   #3
phishfood
Moderator
PLF_MODERATOR.png
 
Join Date: Jan 2010
Location: Orlando, FL
Posts: 4,619
Liked 565 Times on 455 Posts
Likes Given: 767

Default

Is this something that just started happening, or has it been a problem the entire time you have lived there?

__________________
phishfood is offline  
 
Reply With Quote Quick reply to this message
Old 03-04-2011, 01:02 PM   #4
Jayhawk
Junior Member
 
Join Date: Mar 2011
Location: Topeka, KS
Posts: 4
Default

It has always happened in this home. It just didn't seem like this builder, who is known for building quality homes, would have put these kind of (cheap) valves in the home. But it seems that's what he did. This is the fourth home I've owned over the course of 25 years and have never had this issue.

__________________
Jayhawk is offline  
 
Reply With Quote Quick reply to this message
Old 03-04-2011, 05:41 PM   #5
SlowDrip
Plumbing Sales
 
SlowDrip's Avatar
 
Join Date: Nov 2010
Location: Oshawa, Ontario
Posts: 395
Liked 1 Times on 1 Posts

Default

If it has always been an issue then it is defiantly "cheap" valves. 15 years ago many places did not legally require pressure balanced valves, now they are code almost everywhere.


To be fair to the builder (for some reason) most "contractor" series of valves back then did not have pressure balancing built in, and if you are buying dozens of valves you probably don't want to pay more for a fancy picture on the box like you do when buying retail.

__________________
SlowDrip is offline  
 
Reply With Quote Quick reply to this message
Old 03-26-2014, 03:32 PM   #6
sdseaman
Junior Member
 
Join Date: Mar 2014
Posts: 2
Default

We just purchased a house that was built in 1988 and are experiencing the same scalding / freezing issue when any other water source is used during a shower. The house has the original Moen single handle bath / shower controls. I have one local plumber saying that they are pressure balanced. What was the standard back in 1988? Our last house was built in 1993 and the showers were fine.

I have new faucets but am afraid to install them if it won't correct this issue. Please advise and see the attached pic. From my research, a Posi-Temp and MoenTrol were the two Moen lines of pressure balanced faucets and the faucet shows no reference of this name on it.

Moen Shower Knob.jpg  
__________________

Last edited by sdseaman; 03-26-2014 at 03:43 PM. Reason: added pic
sdseaman is offline  
 
Reply With Quote Quick reply to this message
Old 03-26-2014, 03:56 PM   #7
johnjh2o
Senior Member
 
johnjh2o's Avatar
 
Join Date: Jul 2011
Location: Melbourne, Florida
Posts: 2,657
Liked 456 Times on 358 Posts
Likes Given: 311

Default

That is a Moen faucet but it is not anti-scald.

__________________

John

johnjh2o is offline  
 
Reply With Quote Quick reply to this message
Old 03-26-2014, 06:59 PM   #8
sdseaman
Junior Member
 
Join Date: Mar 2014
Posts: 2
Default

Johnjh20, That was my thought but my plumber of 10 years swears it's a pressure balanced / anti-scald faucet. I'll just replace it and move on. Thanks for your help.

__________________
sdseaman is offline  
 
Reply With Quote Quick reply to this message
Old 03-26-2014, 07:08 PM   #9
johnjh2o
Senior Member
 
johnjh2o's Avatar
 
Join Date: Jul 2011
Location: Melbourne, Florida
Posts: 2,657
Liked 456 Times on 358 Posts
Likes Given: 311

Default

Quote:
Originally Posted by sdseaman View Post
Johnjh20, That was my thought but my plumber of 10 years swears it's a pressure balanced / anti-scald faucet. I'll just replace it and move on. Thanks for your help.
Your plumber of ten years more then likely has never installed a shower valve that is not balance pressure. Balance pressure has been required for more then ten years. I have been doing plumbing for over 50 years and that valve is not a balance pressure valve.
__________________

John

johnjh2o is offline  
 
Reply With Quote Quick reply to this message
Old 03-27-2014, 12:30 AM   #10
journeyman
the professional
 
journeyman's Avatar
 
Join Date: Oct 2012
Location: san diego, california
Posts: 267
Liked 83 Times on 64 Posts
Likes Given: 77

Default

John is right that is a moen shower valve. It is not pressure balanced



__________________
journeyman is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Oasis Platinum Steam showers by Ariel islandgirl Showers and Tubs 5 02-14-2013 12:57 AM
Impey Wetroom and Showers j5payne General Plumbing Help 1 03-18-2011 07:09 AM
Toilets bubbling when showers drain Gatorfreak General Plumbing Help 5 05-07-2010 03:16 PM
no hot water in upstairs showers????? jed General Plumbing Help 1 03-03-2010 10:12 PM