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Old 12-14-2010, 09:58 PM   #16
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dual water heaters: parallel or series??


just wondering... are these gas or electric tanks. I'm a big fan of the Bradford White GX high performance tanks. if i remember right the 55 gallon tank has like a 200 gallon first hour rating. if ya haven't seen it and it'll work, i'd consider it

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Old 12-14-2010, 10:34 PM   #17
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dual water heaters: parallel or series??


I don't put valves on hot lines for residentual but it seems like almost all commercial tanks have h&c shut off valves. Can anyone tell me where in the UPC it says not to? I'm to lazy to get my code book out of the truck
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Old 12-14-2010, 10:51 PM   #18
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I don't put valves on hot lines for residentual but it seems like almost all commercial tanks have h&c shut off valves. Can anyone tell me where in the UPC it says not to? I'm to lazy to get my code book out of the truck

I think it is a local code around here. Some of those are just ridiculous
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Old 12-14-2010, 10:53 PM   #19
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dual water heaters: parallel or series??


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I don't put valves on hot lines for residentual but it seems like almost all commercial tanks have h&c shut off valves. Can anyone tell me where in the UPC it says not to? I'm to lazy to get my code book out of the truck
lazy b@$terd :P i'll go grab mine and look it up
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Old 12-14-2010, 11:03 PM   #20
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dual water heaters: parallel or series??


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lazy b@$terd :P i'll go grab mine and look it up
I'll be waiting
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Old 12-14-2010, 11:30 PM   #21
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dual water heaters: parallel or series??


from what i've seen, its not prohibited. 605.2 specifies cold water inlet valve, but also says that one shall be installed on the discharge piping from water supply tanks. Does a water heater count? 608.3 says that anytime restriction of thermal expansion is restricted, an expansion tank is required. Does that (required) valve count? 608.6 doesn't say anything about it, but does talk about valves piped in after the water heater but before a water storage tank. From all that, all my customers now need a valve on the outlet and an expansion tank
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Old 12-15-2010, 12:10 AM   #22
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Good luck with that... We were losing a bunch of jobs when we were following the new Local code that said All houses needed a PRV, Dual Check and exspansion tank. Now we tell them the new code requires them but id you do not want them we understand the difference in the price is _____ , It is bad when some follow the code and others do not know it. I have had to e-mail the code to show we were telling the truth
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Old 12-15-2010, 05:52 AM   #23
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There is nothing in the code against valves on the hot side. The only stipulation is there has to be one on the cold supply before the thermal expansion tank. Doc must be dealing with a local addendum.
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Old 12-15-2010, 08:53 AM   #24
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Good luck with that... We were losing a bunch of jobs when we were following the new Local code that said All houses needed a PRV, Dual Check and exspansion tank. Now we tell them the new code requires them but id you do not want them we understand the difference in the price is _____ , It is bad when some follow the code and others do not know it. I have had to e-mail the code to show we were telling the truth
My city is asking for double checks on commercial now. We remodeled a shower rm, it had an existing WH that served this bathrm/shower group. The inspector wanted an expansion tank on it because of the new double check. He was so happy about the correction notice that missed the other 2 WH in the bldg
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Old 12-15-2010, 09:16 AM   #25
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LOL, I agree this day and age the codes have moved way overboard. Problem is that overtime when we (The Plumbing Profession) improve things the result is always opposite and equal. Frigging Newton pisses me off. Not to mention the blatant violators that cause the increased strigency of the code.

I used to be under UPC and at that time they required rpz check valves on all domestic supplies . Now I am under IPC and they don't but are moving that way. They just started requiring thermal expansion on water heaters, and that is even at the inspector's discretion.
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Old 12-15-2010, 09:31 AM   #26
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from what i've seen, its not prohibited. 605.2 specifies cold water inlet valve, but also says that one shall be installed on the discharge piping from water supply tanks. Does a water heater count? 608.3 says that anytime restriction of thermal expansion is restricted, an expansion tank is required. Does that (required) valve count? 608.6 doesn't say anything about it, but does talk about valves piped in after the water heater but before a water storage tank. From all that, all my customers now need a valve on the outlet and an expansion tank
dont forget to put a vacuum breaker on the faucet on the bottom of the water heater

Last edited by Ltnicks; 12-15-2010 at 09:33 AM.
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Old 12-15-2010, 10:17 AM   #27
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dual water heaters: parallel or series??


AO Smith's opinion: Parallel vs. Series Piping - Technical Bulletin Number 64
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Old 12-15-2010, 12:44 PM   #28
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dual water heaters: parallel or series??


Like I said parallel!!!! I'm right...... I win!!!!!!
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Old 12-15-2010, 01:03 PM   #29
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dual water heaters: parallel or series??


Work4living:congratulations!! I will mail you your reward.

The reward is the old leaky 50 gallon water heater I removed.

All you have to do is pay shipping and handling.
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Old 12-15-2010, 01:12 PM   #30
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Woooooooooo Hoooooooooooo.....

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