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Author Topic: water bypass switch hot water heater  (Read 1348 times)
PattersonFL
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« on: May 05, 2013, 07:58:26 AM »

I've never used the hot water heater.  Tinkering with it now.  I cannot find the owners manual for the heater. The camper manual states to open the bypass valve for the hot water tank.  I found a valve under the sofa but cannot tell which way is open or closed.  If I turn the hot water faucet on,  I get water regardless of the position of the valve.   I want to make sure it's correct before firing up the heater though.

Any tips on knowing if it's open or closed / correct position?

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yooperguy
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« Reply #1 on: May 05, 2013, 08:07:04 AM »

Couple of thoughts...  on mine - the oval knob for the inline valve is indicitive of whether the valve is open or not.  Say the line is horizontal... then the knob will look "vertical" when the valve is closed and "horizontal" or oriented the same as the line when open.  Hope that made sense and maybe yours aren't like that so...

You could always drain the water heater by pulling the anode rod.  The anode rod should be inspected anyway.  Then replace the rod/plug and run the hot water.  If you hear the tank filling... the valve is open.  If the tank does not fill and you get water right away, the valve is in bypass position.  Hope that makes sense too...   Smiley



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kfriceman
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« Reply #2 on: May 05, 2013, 08:30:34 AM »

If the valve handle is perpenducular to the the line it is closed, if parralell it is open.  As to what this valve is for I'm not sure from your description.  By passess for the water heater are generally an optioned item and not stock, your heater may or may not have them.

The by-pass is usually placed directly off the water heater tank itself, look there for a valve.

-Kevin

« Last Edit: May 05, 2013, 08:31:30 AM by kfriceman » Logged

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beemerphile1
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« Reply #3 on: May 05, 2013, 01:12:26 PM »

Need pictures.  There are different valving systems for water heater bypass.  Some have one valve, some two, and some three.  However they are configured they are typically right on the water heater.
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PattersonFL
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« Reply #4 on: May 05, 2013, 01:21:07 PM »

Thanks all,  I think I have it figured out.  I left the water hooked up and turned on for a while with the valve in both positions.  I fugured this way I was sure to have the hot water tank filled.

I then turned on the LP,  hit the rocker switch inside the camper and the heater fired up.  I left it burning until it shut itself off.

Then I turned off the heater via the rocker switch,  turned off the LP tank.  Turned on the hot water faucet at the sink and had nice hot water.  Then turned the valve at the heater to the other position.  The sink faucet then ran cold instead of hot.  So I figured out the correct position to get the hot water.   

Odd though,  the outside shower hot faucet produced hot water regardless of where the valve lever at the heater was positioned.     
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« Reply #5 on: May 05, 2013, 04:14:39 PM »

I've never used the hot water heater.  Tinkering with it now.  I cannot find the owners manual for the heater.

First identify just which water heater make (Suburban or Dometic) and model you have and download the owners manual from the manufacturer's respective website - Suburban or Atwood.

Quote
The camper manual states to open the bypass valve for the hot water tank.  I found a valve under the sofa but cannot tell which way is open or closed.

Any bypass system will be installed on the end of the water heater and may make use of one, two, or three valves so that valve you found under your sofa isn't it.  Since it's the trailer manufacturer that would install this bypass you won't find any information in the water heater manual but rather your trailer owner's manual. Provide a link to pics of your water heater and we can tell you how to set those valves for correct operation.
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