2 pumps, different flow velocities?

  • Active since 1995, Hearth.com is THE place on the internet for free information and advice about wood stoves, pellet stoves and other energy saving equipment.

    We strive to provide opinions, articles, discussions and history related to Hearth Products and in a more general sense, energy issues.

    We promote the EFFICIENT, RESPONSIBLE, CLEAN and SAFE use of all fuels, whether renewable or fossil.
Status
Not open for further replies.
Ok so if anyone could help me get a better idea on this, that would be awesome. I'm trying to figure out flow velocities and pipe sizes. Basically how can you have a 1-1/4 supply lines and 3/4" baseboard tubes? Flows don't seem to be compatible unless i'm missing something.

My system will be almost exactly like the diagram except that I wont have the solar, and the heating sources will be 3 zones of baseboards, all coming from a manifold.

THE PROBLEM: I want to use 1-1/4" thermopex from the wood boiler to the storage tank, and a pump that is pumping @ 11 gpm so my boiler can run full bore (BIOMASS 40 boiler) and warm the storage as well as heat the baseboards. But I was thinking of making the zone loops 5/8" pex, and the max flow is 3.3 gpm. Also thought of reducing to 1" right after the inlet to the storage tank.

Can there be 2 separate flow velocities in the system? Would the extra flow just go into the storage tank? Or what do I need to do?

HELP!
Eric
 

Attachments

  • Solar-or-Wood-Buring-Boiler-Diagram.png
    Solar-or-Wood-Buring-Boiler-Diagram.png
    5 KB · Views: 469
Last edited:
Different flow rates in different parts of a system are common. Use balancing valves or circuit setter type valves to obtain the flow you want in each part of the system.
 
Status
Not open for further replies.