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04-15-2008, 07:27 PM
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Member
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Join Date: Mar 2007
Location: Charleston, WV
Posts: 48
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TPR Discharge pipe reduction
I came across this water tank today. When I looked at the tpr valve I snapped a picture and moved on just thinking it was incorrect. Now when I look at the picture, I don't see a reduction fitting at the top of the tank. I have never seen a 1/2 inch fitting (in the body of the tank) for a tpr valve. I see a reduction in pipe size after the valve quite often but I have never seen a reduction between the tank and the valve. Am I missing something?
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Greg Jenkins
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04-15-2008, 08:00 PM
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Join Date: Mar 2007
Location: Camp Verde, Arizona
Posts: 463
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Re: TPR Discharge pipe reduction
That is odd. I wonder if there was another 3/4 fitting somewhere else on the water heater they were supposed to use for the T&P.
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04-15-2008, 08:25 PM
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Join Date: Mar 2007
Location: Santa Rosa, CA
Posts: 764
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Re: TPR Discharge pipe reduction
I would agree with Fritz. Could that be where the sacrificial anode rod goes?
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The apostrophe troll.
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04-15-2008, 08:49 PM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,732
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Re: TPR Discharge pipe reduction
Originally Posted by Gunnar Alquist
I would agree with Fritz. Could that be where the sacrificial anode rod goes?
That's what I'm thinking too, and that this particular water heater is like some I've side, side T&P *only*, no top opening for the T&P (most tanks with a side T&P opening have that as an "alternate" opening, with the preferred location being in the top of the tank, but, I've seen a couple of tanks in the past which *only had* the side opening for the T&P).
Of course, if that is for the anode rod, that tank is probably gone now any way.  |
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04-16-2008, 06:24 AM
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Member
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Join Date: Mar 2007
Location: Charleston, WV
Posts: 48
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Re: TPR Discharge pipe reduction
Good call. I now know to look elsewhere on the tank for another fitting. You learn something everyday in this business.
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Greg Jenkins
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04-16-2008, 07:07 AM
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Join Date: Mar 2007
Location: Spring Hill (Nashville), TN
Posts: 1,754
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Re: TPR Discharge pipe reduction
How old is that tank? I haven't seen that Harvest Gold color in ages!
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04-16-2008, 07:21 AM
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Join Date: Mar 2007
Location: Spring City/Surrounding Philadelphia area
Posts: 762
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Re: TPR Discharge pipe reduction
Interesting call on the color Scott. I was thinking Gulden's Mustard.
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04-16-2008, 07:30 AM
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Join Date: Mar 2007
Location: Ormond Beach, Florida
Posts: 7,732
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Re: TPR Discharge pipe reduction
Originally Posted by Scott Patterson
How old is that tank? I haven't seen that Harvest Gold color in ages!
1960s to 1970s. 
Back when you wanted your water heater to match the clothes washer and clothes dryer next to it ... until you replaced them with white appliances ...  |
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04-16-2008, 08:07 AM
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Member
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Join Date: Mar 2007
Location: Longwood, FL
Posts: 307
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Re: TPR Discharge pipe reduction
It looks like a modern 3/4 inch valve in an older tank with a 1/2 inch opening.
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04-16-2008, 10:45 AM
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Join Date: Mar 2007
Location: Hudson, WI
Posts: 436
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Re: TPR Discharge pipe reduction
Temp probe may be too short to be effective as well. From the Watts site:
"Alternate" ONLY when the tappings are not provided:
Use standard or extra length extension thermostat which permits the end of the thermostat to extend into the top 6" of the tank.
For Heaters with Direct Top Tapping:
Always use an extension type thermostat T&P relief valve which permits the end of the thermostat to extend into the top 6" of the tank. |
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04-16-2008, 10:50 AM
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Join Date: Mar 2007
Location: Camp Verde, Arizona
Posts: 463
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Re: TPR Discharge pipe reduction
I'm guessing its not that old. Aren't those plastic caps where they put in foam insulation?
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