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Old 10-14-2009, 07:14 PM   #1
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Best fittings from the boiler?


I was looking for input as to the best fittings from the boiler to the taco pumps in a radiant heat system.(T's reducers, stubs, etc.) Cast iron would be my first choice. There is also black, galvanized, and bronze. I don't want copper in this section of the piping if at all possible. I have a system where the zones are controlled by individual thermastatically controlled pumps. Thanks in advance.

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Old 10-22-2009, 02:28 PM   #2
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Best fittings from the boiler?


waiting for answer on this one, just wanted to bring to top!!

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Old 10-22-2009, 03:09 PM   #3
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Best fittings from the boiler?


if the boiler is copper tubed...i would use a dielectric union and go to black pipe.

I would personally put the pump (if the boiler doesn't have a pump) if designed properly at the supply side of the boiler with a pressure and temperature gauge on the discharge side of the boiler.

Last edited by Viper16; 10-22-2009 at 03:15 PM.
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Old 10-22-2009, 03:25 PM   #4
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Best fittings from the boiler?


Black pipe, if your radiant loops are using Hpex. or some other oxygen barrier material.
If not, then copper, brass or some other non ferrus material.
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Old 10-22-2009, 04:51 PM   #5
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Best fittings from the boiler?


Quote:
Originally Posted by Viper16 View Post
if the boiler is copper tubed...i would use a dielectric union and go to black pipe.

I would personally put the pump (if the boiler doesn't have a pump) if designed properly at the supply side of the boiler with a pressure and temperature gauge on the discharge side of the boiler.
Pumps go on the return
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Old 10-22-2009, 05:43 PM   #6
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Best fittings from the boiler?


thanks everyone...I do have oxy barrier tubing so I think that black pipe would be the best choice for me
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Old 10-22-2009, 07:06 PM   #7
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Best fittings from the boiler?


Quote:
Originally Posted by Plumber101 View Post
Pumps go on the return

Why?

Circs on the supply can have several advantages over having them on the return.
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Old 10-23-2009, 11:46 AM   #8
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Best fittings from the boiler?


Quote:
Originally Posted by jr67z View Post
thanks everyone...I do have oxy barrier tubing so I think that black pipe would be the best choice for me
Don't forget the dielectric union if the boiler is copper...you will cause some nasty corrosion.
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Old 10-23-2009, 01:33 PM   #9
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Best fittings from the boiler?


will do...thanks

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