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 12-06-2012, 07:53 PM   #1
Solutions (handyman)
 
Join Date: Apr 2009
Location: Central Alberta Canada
Posts: 334
Rewards Points: 0
Share |
Default

Hot water gets hotter


We are on a well and the water comes in, through a pressure system to the water tank. (of course cold is seperate). When taking a shower, the water is cool until the hot kicks in at the showerhead level. The hot is too hot so we turn it down to a comfortable level. After about 90 seconds the water gets hotter once again. Doesn't make sense to me. Can someone explain what might be the cause? Thanks.

Mark Harvey is offline   Reply With Quote
Old 12-07-2012, 12:18 PM   #2
Member
 
Join Date: Apr 2007
Posts: 545
Rewards Points: 54
Default

Hot water gets hotter


Quote:
Originally Posted by Mark Harvey View Post
We are on a well and the water comes in, through a pressure system to the water tank. (of course cold is seperate). When taking a shower, the water is cool until the hot kicks in at the showerhead level. The hot is too hot so we turn it down to a comfortable level. After about 90 seconds the water gets hotter once again. Doesn't make sense to me. Can someone explain what might be the cause? Thanks.
Is it only at the shower? What about the sink next to it, or any other fixture(s) in the house? What kind of shower valve? Moen? Symmons? Kohler?

If this is happening only at that one shower valve, I suspect the stem/cartridge, or "balancing spool" (depending on the make of the valve) needs to be replaced.

Ishmael is online now   Reply With Quote
Old 12-07-2012, 12:33 PM   #3
Special User
 
Join Date: Jul 2012
Location: Idaho, US
Posts: 551
Rewards Points: 0
Default

Hot water gets hotter


If the house has galv or copper piping, you are sending hot water through cold metal pipes at the beginning of your shower. The cold pipes "steal" some the heat, cooling the water (particularly if the pipes are traveling through a cold basement or crawl, and/or if you turn your furnace thermostat down at night).

After a few minutes though, the metal pipes heat up and you get hotter water at your destination.

Ishmael is right, try it at a sink (before you shower, so the pipes are still cold). If it does the same thing there, it's probably the pipes. If the problem does not occur there, it's probably the shower valve.
__________________
The above post is for entertainment purposes only. Its contents may, and probably will, lead to legal liability and damage or loss of property, life, or limb. Use at your own risk.
tylernt is offline   Reply With Quote
Old 12-07-2012, 01:36 PM   #4
Solutions (handyman)
 
Join Date: Apr 2009
Location: Central Alberta Canada
Posts: 334
Rewards Points: 0
Default

Hot water gets hotter


Thanks, the valve makes sense (MOEN). The plumbing is all PEX and the distance from the tank to the shower is about 15 ft. Almost straight up. I'll try the sink but we don't run the water there too long because we have a holding tank. (rural people know what I'm talking about.)
Mark Harvey is offline   Reply With Quote
Old 12-07-2012, 01:37 PM   #5
Special User
 
Join Date: Jul 2012
Location: Idaho, US
Posts: 551
Rewards Points: 0
Default

Hot water gets hotter


Quote:
Originally Posted by Mark Harvey View Post
Thanks, the valve makes sense (MOEN). The plumbing is all PEX and the distance from the tank to the shower is about 15 ft. Almost straight up. I'll try the sink but we don't run the water there too long because we have a holding tank. (rural people know what I'm talking about.)
15ft of Pex has almost no thermal mass to speak of. I think it's your shower valve.
__________________
The above post is for entertainment purposes only. Its contents may, and probably will, lead to legal liability and damage or loss of property, life, or limb. Use at your own risk.
tylernt is offline   Reply With Quote
Old 12-07-2012, 01:48 PM   #6
Member
 
Join Date: Apr 2007
Posts: 545
Rewards Points: 54
Default

Hot water gets hotter


There's two basic Moen valves: "Positemp" and "Moentrol". The Positemp has a big, fat cylindrical stem. You turn it on and off by turning the handle. The Moentrol has a smaller cylindical stem that you pull out to turn the water on; push it in to turn the water off, and turn it to adjust the temperature.

If you have the Positemp, you just have to replace that stem. If yours is a Moentrol, then you need to replace the "balancing spool". When you remove the trim plate, you'll see a large screw head next to the stem; that's the balancing spool.

Make sure you shut the water off before you try to work on those valves!
Ishmael is online now   Reply With Quote
The Following User Says Thank You to Ishmael For This Useful Post:
Mark Harvey (12-07-2012)
Old 12-07-2012, 01:50 PM   #7
Special User
 
Join Date: Jul 2012
Location: Idaho, US
Posts: 551
Rewards Points: 0
Default

Hot water gets hotter


Quote:
Originally Posted by Ishmael View Post
Make sure you shut the water off before you try to work on those valves!
__________________
The above post is for entertainment purposes only. Its contents may, and probably will, lead to legal liability and damage or loss of property, life, or limb. Use at your own risk.
tylernt is offline   Reply With Quote
The Following User Says Thank You to tylernt For This Useful Post:
Mark Harvey (12-07-2012)
Old 12-07-2012, 02:05 PM   #8
Solutions (handyman)
 
Join Date: Apr 2009
Location: Central Alberta Canada
Posts: 334
Rewards Points: 0
Default

Hot water gets hotter


It must be the Positemp. Thanks for solving this mystery. It isn't a big issue but is baffeling.
Thanks again.

Mark Harvey 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
Warm Water out of Cold Water Outlet mb0709 Plumbing 9 08-26-2012 12:59 PM
Water Inside/Around American Standard Furnace michrob HVAC 8 12-08-2011 03:51 PM
Oil fired furnace and hot water heater question steveinpa Plumbing 3 08-10-2010 08:42 AM
How Do I Properly Shock Chlorinate a Water Softner classicflytyer Plumbing 5 07-14-2009 12:15 AM
low hot water pressure angus242 Plumbing 10 01-08-2009 11:41 AM




Top of Page | View New Posts

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