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Old 08-08-2008, 07:17 AM   #1
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Another Gas WH question


I have two older Bradford White 40 gallon gas-fired wter heaters plumbed in parallel. I have both units set to about 120 deg. Yesterday and today I notice a very cooler shower. I have a anti-scold shower mixing valve. Normally, the first couple of muinutes of the shower is hot, then it slightly tapers off. The last two days, it has been much cooler.

I check the heaters and both are running (burners working, etc.) I felt the copper outlet pipe on both. One is hot, the other is only slightly warm. I am thinking that maybe I have an obstruction in the outlet pipe on the cooler WH that is keeping the water from flowing. I am going to try each WH separately tonight and see what else I can find.

Thoughts/ Comments?

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Old 08-08-2008, 09:31 AM   #2
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Another Gas WH question


Hows the pressure at the shower when you use full hot water?

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Old 08-08-2008, 09:33 AM   #3
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Another Gas WH question


Honestly, it is fair, but it has never been that great. I find the anti-scald valves usually have a huge pressure drop.
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Old 08-08-2008, 10:19 AM   #4
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Another Gas WH question


Javan:

Prolly broken dip tube in the cooler water heater.

Water supply pipe blockages are pretty rare. Broken dip tubes are pretty common. If you're gonna replace one, you may as well do them both.

Do this:

Release some water from the drain valve of each heater. If the dip tube isn't broken, then the water coming out of the heater will be luke warm at best. That's because the cold water comes into the heater through the bottom of the dip tube which is near the bottom of the tank where the drain valve is, so the released water contains lots of cold water.

If the water released from the drain valve is HOT, then you know there's no cold water in it. Ergo, dip tube is busted.

Last edited by Nestor_Kelebay; 08-08-2008 at 10:26 AM.
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Old 08-08-2008, 10:39 AM   #5
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Another Gas WH question


Most likely the case!

Glad that I am already planning to replace!!
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Old 08-08-2008, 12:46 PM   #6
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Another Gas WH question


Found the problem!

Feel like an idiot!

I got home and the WH was running. I shut the water off of one, then ran the hot water at the tap. Just tepid. I shut the HW off at the other, ran the tap, Hot! I check the burner again, no flame!

I just looked outside. No Meter! I told the guy as NYSEG last week that we had two services to the house and wanted to get rid of the Apartment service when we put in the new WH and Furnace. They jumped the gun. First thing I saw was the lock on the shutoff valve. 2nd thing I saw was the lack of a 2nd meter! My thinking is that they shuoff the gas yesterday and came by today to remove the meter.

Oh well. Guess we have to live with a small WH until we get the new one!

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