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Old 01-13-2009, 08:45 PM   #1
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hooking up a boiler


i want to replace my boiler with another used one. the one i have now is very old, and the water lines comming out of it are very large (3-4" diameter) steel lines. the one i want to buy had 2" copper lines comming out. what is involved in hooking this up to the large steel lines i have now?

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Old 01-13-2009, 09:20 PM   #2
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hooking up a boiler


Big reducing couplings.

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Old 01-13-2009, 09:24 PM   #3
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hooking up a boiler


you can get reducing adapters that are copper and thread them onto the exsisting 4" ans then pipe into the new boiler with copper from the 2" side of the adapter.....check HD for fittings........exsisting 4" lines are your running steam or HW for heating
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Old 01-13-2009, 09:28 PM   #4
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hooking up a boiler


Quote:
Originally Posted by beenthere View Post
Big reducing couplings.
Thats funny!!! I needed that
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Old 01-13-2009, 10:07 PM   #5
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hooking up a boiler


yes its a hot water system.
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Old 01-13-2009, 10:13 PM   #6
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hooking up a boiler


LOL...

Ok, they reducing bell couplings.

I use cast iron ones.
Using copper female adapters on pipe that large can present small leaks problems when the system comes up to temp.

Guessing his system was gravity at one time.
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Old 01-13-2009, 10:27 PM   #7
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hooking up a boiler


so does the copper sweat into the cast iron bell coupling?
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Old 01-14-2009, 05:28 AM   #8
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hooking up a boiler


You would use a male adapter.

It has a threaded end for screwing into cast/steel fittings, and a sweat end for copper to copper connections.

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