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06-06-2015, 07:29 AM
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#1
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Member
Join Date: May 2015
Location: Erie
Posts: 97
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Pressure relieve valve
What position do I put the pressure relieve valve when filling up the camper with water? I assume closed? And how about when I light the water heater pilot and turn on the water heater? Should it be open first and then closed?
Thanks
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06-06-2015, 09:12 AM
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#2
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Senior Member
Join Date: Jan 2015
Location: Surprise
Posts: 2,623
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If your talking about the pressure relief on the tank, you do nothing with it. It only opens when the tank overheats and pressure raises.
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2011 Toyota Tundra double cab
2015 27RLS
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06-06-2015, 09:14 AM
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#3
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Senior Member
Join Date: Nov 2013
Location: north az
Posts: 305
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Pressure relief valve on w/h are there to pop open in case the w/h overheats. Its also a easy way to break the vacuum while draining the tank. All other times it should be closed, for water will exit thru it while filling.
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06-06-2015, 09:34 AM
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#4
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Senior Member
Join Date: Sep 2014
Location: Blaine
Posts: 152
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The relief valve can be opened when your filling up with water to purge the air out when water flows out close it. This is what I do, makes for less spitting at the faucets the first time.
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06-06-2015, 09:58 AM
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#5
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Senior Member
Join Date: Mar 2015
Location: Bartonville
Posts: 513
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The relief valve should normally be closed, but should be opened now and again to make sure it operates freely, if needed. I use the relief a few times each year to drain the water heater, if the camper sits for more than two weeks. (The water can get pretty skunky just sitting in it!) Using it for draining also exercises it, so it's a win-win.
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Scoutr2 (Mike)
2015 Jay Flight 32RLDS Elite
2012 Chevy 2500HD Crew Cab LTZ (6.6L Duramax/Allison)
Equalizer Hitch (1200# bars)
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06-06-2015, 10:30 AM
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#6
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Senior Member
Join Date: Aug 2013
Location: Bellingham,Wa.
Posts: 6,680
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Never open it when it's hot 140deg. You'll get almost scalded. If your in the process of draining the hot water heater and you have the drain plug OFF then you can open it.
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2010 Jayco Hybrid EXP21M
2013 Toureg TDI
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06-06-2015, 01:04 PM
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#7
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Senior Member
Join Date: Mar 2013
Location: Kansas City
Posts: 1,712
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Quote:
Originally Posted by rabalin
The relief valve can be opened when your filling up with water to purge the air out when water flows out close it. This is what I do, makes for less spitting at the faucets the first time.
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x2
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2018 28BHBE
2017 Ford F250 XLT, 6.2 gasser
2013 26BH (traded)
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06-06-2015, 02:46 PM
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#8
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Senior Member
Join Date: Apr 2010
Location: Minneapolis, MN
Posts: 224
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Quote:
Originally Posted by rabalin
The relief valve can be opened when your filling up with water to purge the air out when water flows out close it. This is what I do, makes for less spitting at the faucets the first time.
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That is a great idea! I will try it when I fill up this week.
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2010 Jayco 17Z
2007 Jeep Commander Overland 4x4 HEMI
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06-08-2015, 02:06 PM
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#9
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Member
Join Date: May 2015
Location: Erie
Posts: 97
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Great tip
Thanks
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07-08-2015, 02:28 PM
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#10
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Senior Member
Join Date: Mar 2015
Location: KENOSHA
Posts: 120
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I'd like to get a clarification on these posts re: pressure relief valve. I drain our Jayco travel trailer's water heater before breaking camp. However, the w/h plastic drain plug becomes a missile when I unscrew it even after unhooking the municipal water source, opening the low point drain and opening faucets inside the trailer. I interpret the postings here to suggest using the valve to ease the pressure before unscrewing the plug ("it's an easy way to break the vacuum while draining the tank"). But another posting seems to say the plug comes out first, then the valve can be opened ("If you're ... draining the water heater and you have the drain plug OFF, then you can open it"). Can somebody explain a proper procedure to drain the w/h without the drain plug becoming a weapon? Thanks much. John K, dedlnr@aol.com
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07-08-2015, 03:04 PM
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#11
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Member
Join Date: Mar 2014
Posts: 59
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Quote:
Originally Posted by John K.
Can somebody explain a proper procedure to drain the w/h without the drain plug becoming a weapon?[/email]
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I'm with you....I'm worried about using the relief valve while it's HOT...
Here's an excerpt from the Manual:
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2013 Jayco x23B
2014 Toyota Tundra 5.7
2012 Jayco 17Z (sold 7/18)
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07-08-2015, 03:54 PM
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#12
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Senior Member
Join Date: Sep 2013
Location: South Texas
Posts: 7,216
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IMO, the biggest danger in relieving the pressure is if the water is still hot. We don't travel with the WH on, so I just drain it in the driveway when I get home. I know the heater hasn't been on in a long time, and the water is no longer hot. So I lift the valve (and open the HW faucets) and that relieves all the pressure. Then I pull the plug. When all the water is out, I close the valve and replace the plug. Just make sure you're not hooked up to water and your pump is off or it'll try to refill the tank. Be careful to stand aside when you lift the pressure relief valve if the water is still hot, but the procedure still stands, you just have to be more careful; you could get burned.
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-2018 Greyhawk 29MV
-2020 Jeep Wrangler Unlimited (JLU) (Primary Toad)
-1994 Jeep Wrangler YJ (Secondary Toad)
-2014 Jay Flight 28BHBE & Ram 2500 6.4L CC 4x4 (sold)
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07-08-2015, 03:56 PM
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#13
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Senior Member
Join Date: Aug 2012
Location: Kalamazoo
Posts: 769
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Quote:
Originally Posted by rabalin
The relief valve can be opened when your filling up with water to purge the air out when water flows out close it. This is what I do, makes for less spitting at the faucets the first time.
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X2
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2019 Jayco 26BHX Eagle HTX Fifth Wheel
2018 Chevrolet Silverado Double Cab 2500HD 4X4 6.0L 4.10 axle
Reese 16K Round Tube Slider Hitch
HD Trailering Package with Integrated Brake Controller
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07-09-2015, 09:32 AM
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#14
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Senior Member
Join Date: Mar 2015
Location: KENOSHA
Posts: 120
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Thanks to everyone for the assistance in the process for draining the water heater tank. We've been on trips where we've not even heated water in the tank, but, when we do, I make sure the contents are no more than warm -- cold is better -- before draining the tank.
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