Water Heater Pressure Relief Valve Outlet Size?
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 09:16 AM
This is what I am trying to avoid doing:
Unfortunately I can't do much by trial and error because the trailer is at a remote campsite. The nearest hardware store is 80+ miles each way. The campsite is also 4 hours from my home. I am going up this weekend to get this and a few other projects done but time is very limited. I really don't want to pull the valve from the water heater if I can avoid it.
I guess the question is: are the outlets a universal size or should I bring a selection of sizes? I'm guessing 1/2"? NPT I'm assuming?
Thanks!
2017 Grey Wolf 26DBH
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-22-2017 05:33 AM
cpaulsen wrote:wa8yxm wrote:
There are two sizes common 1/2 and 3/4. but on RV's only the 1/2 is used.
Mine is 3/4".
Shot that in the foot.... 2 times., make it 3. My Sub is 3/4 as well.
1997 Ford 7.3 OBS 4x4 CC LB
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-22-2017 03:01 AM
wa8yxm wrote:
There are two sizes common 1/2 and 3/4. but on RV's only the 1/2 is used.
Mine is 3/4".
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 09:06 PM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 08:21 PM
wa8yxm wrote:
There are two sizes common 1/2 and 3/4. but on RV's only the 1/2 is used.
Not so....
Suburban uses a 3/4" NPT
Atwood used two sizes......1/2" NT & 3/4" NPT depending on year/model
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 04:18 PM
2005 Damon Intruder 377 Alas declared a total loss
after a semi "nicked" it. Still have the radios
Kenwood TS-2000, ICOM ID-5100, ID-51A+2, ID-880 REF030C most times
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 04:03 PM
1997 Ford 7.3 OBS 4x4 CC LB
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 04:01 PM
JoshInReno wrote:SidecarFlip wrote:
It's a standard box store / hardware store T&P valve just like you have on your residential HWH. One size basically fits all.
Well that's why I asked. I'm going through my handy Grainger catalog here and I'm seeing valves with an outlet size of 1/2, 3/4, 1 and even larger. I'm not seeing much consistency.
I think I'm just going to take 3/8, 1/2 and 3/4 fittings to be safe.
Lowes, Home Despot or your local hardware will be cheaper than Grainger. Grainger works for specialty items. A T&P valve is not a specialty item.
Get them from a box store, you can return the unused ones.
1997 Ford 7.3 OBS 4x4 CC LB
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 03:36 PM
Dusty
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 03:04 PM
SoundGuy wrote:
Atwood water heater relief valve, 1/2", Mfg Part #92655.
That part number is for a 75 psi 1/2" NPT relief valve. Not the one used on typically Atwood RV Water Heater
There are FOUR (4) different part numbers for Atwood Water heaters.
These 2 are most common based on year/model
91604 Relief Valve (150 psi) 1/2” - NPT
90028 Relief Valve (150 psi) 3/4” - NPT
These two are less common---mostly used for 'marine applications'
92655 Relief Valve (75 psi) 1/2” - NPT
92647 Relief Valve (75 psi) 3/4” - NPT
Suburban water heater relief valve, 3/4", Mfg Part #161230.
Atwood.....can be confusing----based on year/model and application (RV/Marine)
Suburban.....straight forward---one size
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 01:49 PM
Suburban water heater relief valve, 3/4", Mfg Part #161230.
2014 Coachmen Freedom Express 192RBS
2003 Fleetwood Yuma * 2008 K-Z Spree 240BH-LX
2007 TrailCruiser C21RBH * 2000 Fleetwood Santa Fe
1998 Jayco 10UD * 1969 Coleman CT380
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 01:48 PM
Atwood uses a 1/2" NPT IF it is a 2003 and older model
Atwood uses a 3/4" NPT IF it is a 2004 and newer model
Really don't need any fittings, adapters etc
Just remove T&P Relief Valve and pour vinegar (4 gal to 2 gal water) or Hydrogen Peroxide solutions in thru opening using a FUNNEL'
2007 DODGE 3500 QC SRW 5.9L CTD In-Bed 'quiet gen'
2007 HitchHiker II 32.5 UKTG 2000W Xantex Inverter
US NAVY------USS Decatur DDG31
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 01:24 PM
SidecarFlip wrote:
It's a standard box store / hardware store T&P valve just like you have on your residential HWH. One size basically fits all.
Well that's why I asked. I'm going through my handy Grainger catalog here and I'm seeing valves with an outlet size of 1/2, 3/4, 1 and even larger. I'm not seeing much consistency.
I think I'm just going to take 3/8, 1/2 and 3/4 fittings to be safe.
2017 Grey Wolf 26DBH
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 12:12 PM
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report Inappropriate Content
Sep-21-2017 11:44 AM
1997 Ford 7.3 OBS 4x4 CC LB