RV.Net Open Roads Forum: Class A Motorhomes: Hot Water Tank Mixing Valve

RV Blog

  |  

RV Sales

  |  

Campgrounds

  |  

RV Parks

  |  

RV Club

  |  

RV Buyers Guide

  |  

Roadside Assistance

  |  

Extended Service Plan

  |  

RV Travel Assistance

  |  

RV Credit Card

  |  

RV Loans

Open Roads Forum Already a member? Login here.   If not, Register Today!  |  Help

Newest  |  Active  |  Popular  |  RVing FAQ Forum Rules  |  Forum Help and Support  |  Contact

Search:   Advanced Search

Search only in Class A Motorhomes

Open Roads Forum  >  Class A Motorhomes

 > Hot Water Tank Mixing Valve

This Topic Is Closed  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next
Sponsored By:
mtd

chambersburg

New Member

Joined: 06/23/2011

View Profile





Offline
Posted: 03/25/12 05:59am Link  |  Print  |  Notify Moderator

The water pressure on the hot side has decreased since eliminating the mixing valve on a Atwood water heater Any thoughts on how to increase the hot side pressure ?

Lady Fitzgerald

Tempe, AZ, USA, Earth

Senior Member

Joined: 04/26/2011

View Profile


Offline
Posted: 03/25/12 06:04am Link  |  Print  |  Notify Moderator

Why did you eliminate the mixing valve?


Jeannie

hohenwald48

Hohenwald, TN

Senior Member

Joined: 07/27/2002

View Profile


Offline
Posted: 03/25/12 06:05am Link  |  Print  |  Notify Moderator

Never heard of a "mixing valve" on a hot water heater. Are you talking about the water heater bypass valve?

And sometimes the check valve in the water heater line gets clogged or goes bad.


2008 Fleetwood Jamboree 25G
1999 Jeep Wrangler
100% Solar Powered Home
When seconds count, the police are only minutes away.

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 03/25/12 07:21am Link  |  Print  |  Notify Moderator

I HOPE you changed the tstat when you removed the mixing valve. The TEMP of the Atwood XT is about 165 to 170 WITHOUT the mixing valve installed. The normal temp of an Atwood is 140. Doug

ScottG

Bothell Wa.

Senior Member

Joined: 02/25/2005

View Profile


Offline
Posted: 03/25/12 10:43am Link  |  Print  |  Notify Moderator

hohenwald48 wrote:

Never heard of a "mixing valve" on a hot water heater. Are you talking about the water heater bypass valve?

And sometimes the check valve in the water heater line gets clogged or goes bad.


Some Atwood WH's super heat the water and then mix it down with cold water to give a higher capacity without added water volume.
In theory this all sounds like a good idea but there have been lots of problems with the mixing valve.


Scott, Grace and Wesly
2003 Dodge 3500 4x4, 6 speed Cummins (lightly bombed),
2004 Forest River 25RKS many, many mods.
POS H0NDA eu2000i

Buck62

Charleston, South Carolina

Senior Member

Joined: 04/28/2005

View Profile



Good Sam RV Club Member

Offline
Posted: 03/26/12 04:32pm Link  |  Print  |  Notify Moderator

ScottG wrote:

hohenwald48 wrote:

Never heard of a "mixing valve" on a hot water heater. Are you talking about the water heater bypass valve?

And sometimes the check valve in the water heater line gets clogged or goes bad.


Some Atwood WH's super heat the water and then mix it down with cold water to give a higher capacity without added water volume.
In theory this all sounds like a good idea but there have been lots of problems with the mixing valve.


The superheating of the tank water allows Atwood to specifie a 10 gallon hot water tank using an actual 6 gallon size. The mixing valve mixes cold with hot water to get a "normal" hot water temperature at the faucets. Mixing valves sometimes leak or just fail to mix water properly and are replaced. If you eliminate the mixing valve you change the design operation of the hot water tank. You cannot eliminate it and it must be replaced to operate the water tank as designed.

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 03/26/12 06:16pm Link  |  Print  |  Notify Moderator

It would help if you explained WHY you removed the mixing valve and what you were trying to accomplish by doing that. Doug

* This post was edited 03/27/12 07:10am by an administrator/moderator *

dougrainer

Carrolton, Texas

Senior Member

Joined: 06/11/2007

View Profile


Offline
Posted: 03/26/12 06:21pm Link  |  Print  |  Notify Moderator

hohenwald48 wrote:

Never heard of a "mixing valve" on a hot water heater. Are you talking about the water heater bypass valve?

And sometimes the check valve in the water heater line gets clogged or goes bad.


The 6 gallon Atwood produces 9 gallons of Hot water by superheating the 6 gallons and then mixing with cold to produce the 9 gallons of 140 degree water
The 10 gallon does the same thing but produces 16 gallons of 140 degree water
The mixing valves are prone to fail with high mineral content water supplies. Doug

JohnandCara2

Evergreen CO.

Senior Member

Joined: 08/22/2005

View Profile



Good Sam RV Club Member


Posted: 03/26/12 08:13pm Link  |  Print  |  Notify Moderator

If you read my previous posts you will find that I removed the mixing valve due to it clogging after winterization . I ran hot and cold straight out of each. This works with a single adjusting valve in shower just watch how hot you turn it.And no more hot/cold temp changes in the shower or sink. Thought mixing valve was defective but they (Atwood ) wouldn't replace wanted owner to fork over $245 + shipping for it. Junk part thru in trash.

RckyMtnVia

Colorado

Senior Member

Joined: 10/24/2005

View Profile



Good Sam RV Club Member


Posted: 03/27/12 09:00am Link  |  Print  |  Notify Moderator

On the Atwood XT the above posts give a good explanation of how the mixer valve works. These mixing valves get clogged very easily and need replaced. From other posts on this topic on the forum, I understand people have replaced the Atwood valve with one from Home Depot or Lowes, and that it is not as expensive and better quality. If you do not replace it, be very careful if you ever have young kids in your rv because the hot water could scald them.


2013 Winnebago Via 25T
2002 Jeep Liberty Sport (Occasionally)

This Topic Is Closed  |  Print Topic  |  Post New Topic  | 
Page of 2  
Next

Open Roads Forum  >  Class A Motorhomes

 > Hot Water Tank Mixing Valve
Search:   Advanced Search

Search only in Class A Motorhomes


New posts No new posts
Closed, new posts Closed, no new posts
Moved, new posts Moved, no new posts

Adjust text size:

© 2014 RV.Net | Terms & Conditions | PRIVACY POLICY | YOUR PRIVACY RIGHTS