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Master Circ pump + one for each zone?

pickncrew
Member Posts: 13
in Oil Heating
I am a little confused by this video showing circulator pump replacement. Each zone has a circulator, so why is there one master circ pump in-line here? I thought you would only have one master circ pump if you were using zone valves but that doesn't appear to be the case here. Thanks...
<a href="https://www.youtube.com/watch?v=RFou8--DOWU">https://www.youtube.com/watch?v=RFou8--DOWU</a>
<a href="https://www.youtube.com/watch?v=RFou8--DOWU">https://www.youtube.com/watch?v=RFou8--DOWU</a>
0
Comments
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It appears...
The black circ is on the boiler loop. It circulates water thru the boiler when any zone calls for heat.steve0 -
Redundant
It seems redundant… haven't seen too many like this have you?0 -
I/O Manuals:
Do ya' think that is piped like the Weil-McLain manual calls for in a Primary Secondary piping scheme?
Looks like another variation on that "Closely Spaced Tee's" theory.
IE: Close is that it is in the boiler room. NOT 4 to 6 pipe diameters apart.0
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