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Hot water heating system

Asked Dec 31, 2005, 04:17 AM — 3 Answers
Thans for your help in adavance,

I have a hot water heating system boiler with a red pump at the side of the boiler. I would like to know does the pump pushes the water through the
System.or pull the water back to the boiler.

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3 Answers
labman's Avatar
labman Posts: 10,673, Reputation: 3050
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#2

Dec 31, 2005, 07:37 AM
Pumps do a much better job of pushing than sucking. The least little leak on the suction side of a pump draws air in and keeps the pump from pumping water. Therefore, the pump pushes water from the boiler through the system and back.
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karen85's Avatar
karen85 Posts: 6, Reputation: 1
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#3

Dec 31, 2005, 08:50 AM
In real hot water
Thank you for your reply.
I have add a new zone for the attic with a one way thermostat controlled valve.but I find the water rise via the assumed return line.
I have then asked many people the same question that I pose to you and the reply was 50...50.
I do concur with your theory,for that reason I have installed the way I did.

Thanks
Karen
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doug1932's Avatar
doug1932 Posts: 4, Reputation: 1
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#4

May 16, 2012, 01:56 PM
Quote:
Originally Posted by karen85 View Post
Thans for your help in adavance,

I have a hot water heating system boiler with a red pump at the side of the boiler. I would like to know does the pump pushes the water through the
System.or pull the water back to the boiler.
It is not a pump, it is a circulator. It only works in a closed , full system and moves the water in the direction of the arrow. Air in the system comstitutes a blockage ( just like you put a cork in the pipe ) And has to be purged out .
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