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M-SO Message Board » 2004 Attic » Home Fix-it » Archive through March 23, 2004 » Hot water loop on steam boiler, what model circulator « Previous Next »

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tjohn
Citizen
Username: Tjohn

Post Number: 2363
Registered: 12-2001


Posted on Sunday, March 14, 2004 - 9:24 am:   Edit PostDelete PostPrint Post   Move Post (Moderator/Admin Only)

I suppose this is a question for Master Plumber or equivalent. I have a hot water loop on a steam boiler. I just replaced the BG100 bronze with a Red Fox. Is a Red Fox a suitable circulator for a hot water loop. The guy at Palmer Supply figured a Red Fox would be good for 3 years and a Bronze Fox, somewhat longer than that.

Is there a recommended circulator pump for hot water loops on steam boilers.
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Master Plvmber
Citizen
Username: Master_plvmber

Post Number: 194
Registered: 3-2003


Posted on Sunday, March 14, 2004 - 11:55 am:   Edit PostDelete PostPrint Post   Move Post (Moderator/Admin Only)

In theory, returning condensate being more corrosive than ordinary water to an iron body pump, a hot water loop off a steam boiler should require the use of a bronze pump.
Because of particulate matter inevitably found in that loop, it is recommended that a pump with the largest volute (water passageway) possible will work best and last longest.

In practice, if the piping is done well, nearly any pump will work, bronze or iron, large or small.
I don't know how ANYONE could comment on life expectancy with so many factors at hand.

If your piping is 3/4" I would continue using the 100 series. If the pipe size is 1/2", the Red fox is probably going to work better because it can overcome more head (friction).
Master_Plvmber

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tjohn
Citizen
Username: Tjohn

Post Number: 2379
Registered: 12-2001


Posted on Monday, March 15, 2004 - 6:12 pm:   Edit PostDelete PostPrint Post   Move Post (Moderator/Admin Only)

Thanks MP. I'll see how things go with my$60 Red Fox. If it fails too quickly, I'll go with a Bronze Fox. If that fails too quickly, I'll go back to a B&G 100 Bronze.

If I can get 3 years out of a Red Fox, the cheapest option is to replace it every three years. The bronze pumps cost a bunch more.
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Master Plvmber
Citizen
Username: Master_plvmber

Post Number: 195
Registered: 3-2003


Posted on Monday, March 15, 2004 - 6:27 pm:   Edit PostDelete PostPrint Post   Move Post (Moderator/Admin Only)

Agreed.
Master_Plvmber

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