Leaking T&P Valve on Hot Water Tank - Escape Trailer Owners Community

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Old 07-25-2016, 10:27 AM   #1
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Leaking T&P Valve on Hot Water Tank

We had the new to us unit out for a shakedown trip this past weekend. It is amazing how many things you don't realize you need when switching from a tent to a trailer!

I fired up the hot water heater (what a luxury!) and noticed a small drip coming from the back corner of the trailer. I opened the exterior cover on the hot water heater and there a small drip coming from the T&P valve. It appears that this has been going on for a while as the T&P valve is covered in a blue-green coating. It looks like I might need to replace the valve. Has anyone else experienced this problem with their hot water heater?
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Old 07-25-2016, 10:40 AM   #2
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Before swapping it out, try opening it a few times by pulling the lever and allowing some water to flow as there may be some debris on the valve seat preventing a good seal.

You'll need to ensure your system is pressurized for this to work.
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Old 07-25-2016, 10:47 AM   #3
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From the Escape manual:

Pressure Relief Valve - Weeping or Dripping
As in residential water heaters, the water heater equipped in recreational vehicles contains a pressure
relief valve, located behind the exterior water heater door. It is designed to open if the temperature of the
water within reaches 210 degrees F or if excessive pressure is built up. When pressure reaches 150
pounds, the relief valve will open and water will drip from the valve. The valve will close automatically
once the pressure falls below 150 pounds. This dripping is normal and does not indicate a malfunctioning
or defective valve.
52
Also, as water is heated, it expands and with the closed water system in a recreational vehicle, water
expansion will cause weeping at the pressure relief valve.
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Old 07-25-2016, 11:45 AM   #4
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Quote:
Originally Posted by msweet View Post
We had the new to us unit out for a shakedown trip this past weekend. It is amazing how many things you don't realize you need when switching from a tent to a trailer!

I fired up the hot water heater (what a luxury!) and noticed a small drip coming from the back corner of the trailer. I opened the exterior cover on the hot water heater and there a small drip coming from the T&P valve. It appears that this has been going on for a while as the T&P valve is covered in a blue-green coating. It looks like I might need to replace the valve. Has anyone else experienced this problem with their hot water heater?
Ours always decided to leak at the hot water line in the bath. Several things to consider:
The system is closed and not long and pressure builds up. We found differences by making sure the lines were not still pressurized when first heating the hot water; e.g release pressure if on the pump and have it off or turn off city water until the fist initial heating of water is done.

Ultimately I added an accumulator which gave the heating hot water a place to expand to as well as giving us a quieter pump and one that did not pulse on low volume at a tap. Best recent addition we have made. Should have added it years ago.
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Old 07-25-2016, 11:52 AM   #5
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An accumulator sounds like a good idea. What type/brand of accumulator and where did you install it? Is it possible to see a picture of it installed?
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Old 07-25-2016, 12:45 PM   #6
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Originally Posted by ve7ztw View Post
An accumulator sounds like a good idea. What type/brand of accumulator and where did you install it? Is it possible to see a picture of it installed?
Bought a Shurflo accumulator (available on-line or almost any RV store). I installed it right next to the pump in a straight line. That way all I had to do was slightly lift the braided flex up and connect it to a longer piece of braid flex coming off of the accumulator. You can see that I bought some 90 degree PEX fittings with the swivel connectors and some fixed 90 degree fittings to make the smoothest transition. The large loop up from the accumulator in picture number two is my addition. Your layout may be different. HINT: the braided "thin wall" flex that ETI uses is difficult to come by. I bought thicker wall braided flex at Home Depot and made some adjustments which I won't go into here. If anyone wants more details they can PM me, but this post will give you some ideas on how to proceed. A search will turn up others who have added an accumulator to solve noise or pulsing problems. I didn't realize that it would solve my hot water heater startup leaking problem as well.
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Old 07-25-2016, 01:54 PM   #7
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Quote:
Originally Posted by gbaglo View Post
From the Escape manual:

Pressure Relief Valve - Weeping or Dripping
I should have read the manual first... Thanks!
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Old 07-25-2016, 01:56 PM   #8
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Quote:
Originally Posted by techfan View Post
Bought a Shurflo accumulator (available on-line or almost any RV store). I installed it right next to the pump in a straight line. That way all I had to do was slightly lift the braided flex up and connect it to a longer piece of braid flex coming off of the accumulator. You can see that I bought some 90 degree PEX fittings with the swivel connectors and some fixed 90 degree fittings to make the smoothest transition. The large loop up from the accumulator in picture number two is my addition. Your layout may be different. HINT: the braided "thin wall" flex that ETI uses is difficult to come by. I bought thicker wall braided flex at Home Depot and made some adjustments which I won't go into here. If anyone wants more details they can PM me, but this post will give you some ideas on how to proceed. A search will turn up others who have added an accumulator to solve noise or pulsing problems. I didn't realize that it would solve my hot water heater startup leaking problem as well.
This sounds like a great addition! I'll put that on the to-do list. Thanks!
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Old 07-25-2016, 02:05 PM   #9
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Thanks, Tim.
Been wanting to add that myself. Good explanation and pics.
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Old 07-25-2016, 02:09 PM   #10
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Quote:
Originally Posted by ve7ztw View Post
An accumulator sounds like a good idea. What type/brand of accumulator and where did you install it? Is it possible to see a picture of it installed?

I added a PST-1, what they call a 1 gallon tank that really holds 1/2 a gallon. Would have gone for a 2 gallon like I had in my last trailer but there's not enough room.

Groco, Accumulator Tank
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