shutoff valve location, black pipe

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Old 01-31-09, 05:27 PM
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Question shutoff valve location, black pipe

Ok, here's the gig : I'm finishing up an install on a on-demand water heater and it's time to run the gas line. I'm coming through the wall horizontally to a Tee (down for the drip leg and up to the heater). My question is should I put the shutoff valve in the verticle run between the union and the drip leg or in the horizontal run between the Tee and the outside wall ? I know as far as gas flow it makes no difference, but I was wondering if there was an industry standard or preference.
 
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Old 02-01-09, 04:54 AM
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The gas shut off should be installed before the drip leg if possible to make for easy servicing but it is not written in stone. If the drip leg is before the gas stop, you will need to shut off the gas main to service the drip leg.

PS - I have never had to service a drip leg in 25 years.
 
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