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Author:
Lanceboys (NY)
I need to run an 1-1/2 gas line to my pool heater as it is 400,000 btu, can I go from a 1 inch tee at the meter? And my meter has large enough capacity. The line will run approximately 100 feet.
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Author:
bernabeu (SC)
yes, you CAN
? SHOULD YOU ?
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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
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Author:
packy (MA)
we really need to know what else you have in the house and how far from the meter to the pool heater??
you might be better off contacting the gas company and talking to them.
they need to know that an additional load of almost 1/2 million btu's will need to be taken from their street main..
just sayin.. but some areas are pushing the limit of their understreet mains.
they are around here. they are upgrading as fast as they can because they can't keep up with the demand of people convertin from oil to gas..
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Author:
bernabeu (SC)
sorry, Vic, couldn't help myself
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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
Edited 1 times.
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Author:
stuckinlodi (MO)
If you already have other gas appliances in the home then adding that large of a new gas consumption for that distance of new pipe could "starve" one of the other gas appliances when the pool heater opens it's gas valve and fires. As suggested I'd talk to the gas company experts.
Edited 1 times.
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Author:
Lanceboys (NY)
I am 638 as well but have done sprinks for the last 32 years. I have a hot water heater and stove from the gas now, my boiler is oil. My line coming in is 1-1/2 to the meter breaks down to 1" and 1" to each appliance
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Author:
packy (MA)
if your only gas appliances are a stove and a water heater, i doubt that you have a 500,000 BTU gas meter. BUT, you might ?? check with the gas company if you have any doubt . but as it stands you should be OK with the pool heater depending on distance and changes of direction.
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Author:
Lanceboys (NY)
Thank you packy my gas mains in the street were just upgraded to high pressure , I know gas goes by volume but was concerned about going from 1" to 1-1/2
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Author:
packy (MA)
the larger size pipe going to the heater acts like a storage tank. gives you some more volume to draw from for initial startup. after that you should be good to go..
sometimes the gas company can adjust your regulator to give you a touch more pressure in your piping if you are going to be having a big draw like you will have..
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Author:
Lanceboys (NY)
Hi can I use cast iron fittings for gas in my house?
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Author:
bernabeu (SC)
Absolutely Positively NOT
NO NO NO NO
MUST be malleable fittings
Since you, and I, are skilled piping tradesmen, we know that cast iron fittings may have 'sandholes', and are both porous AND brittle.
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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
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Author:
Lanceboys (NY)
I thought so, just checking I don't use mal for sprinks so I guess I have to go and buy them!
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Author:
stuckinlodi (MO)
The fittings I've seen that are appropriate and approved for flammable gas (natural gas, propane) usually have a tag saying so. Typically this is black steel pipe, copper (copper not approved in some areas), yellow brass and now there are flexible pipe lengths that are usually colored yellow. You can't just use any piping, even if it is airtight material it might break down over time with the chemical nature of the gas inside. That's why copper is not approved in some areas, the natural gas in that region contains stuff that corrodes copper and causes pinholeing.
Here is a better list of materials for gas lines:
[www.engineeringtoolbox.com]
Need to be careful about this project, a mistake with a water line will just give you a water leak. But with a gas line leak you can have a serious & dangerous problem. Worse if indoors, but even an outdoor leak is a no-no.
Edited 2 times.
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Author:
bernabeu (SC)
the 'crap' found in our water + rust 'seals' the CI fittings
PERMATEX fills any 'gaps' in the threads
the coefficient of expansion is greater for steel than for CI so the expansion of the steam pipe seals the joint
however, they ARE easy to remove with a hammer
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"Measure Twice & Cut Once" - Retired U.A. Local 1 & 638
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Author:
hj (AZ)
quote; they ARE easy to remove with a hammer
One job, every morning when they turned on the boilers there was loud "bang" from the piping. One morning after it happened there was huge steam leak in the service tunnel. The piping expansion was driving a cast iron elbow into the wall every morning and eventually it broke.
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