IFC Pump on return side or Flow Check Valve on supply side?

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Old 12-15-15, 02:15 PM
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IFC Pump on return side or Flow Check Valve on supply side?

IFC Pump on return side or Flow Check Valve on supply side?

Where is the preferred location when it comes to preventing gravity heat circulation ?

Price wise, the pump and the valve are about the same. Work wise, installing a flow check valve on the supply side would require some minor redoing of the pipes.
 
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Old 12-15-15, 07:24 PM
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First off pump should always be pumping away from the expansion tank connection. IFC pump especially should never be on the return side of the boiler. The only time it is OK to pump the return side of the boiler would be primary/secondary piping and a mod/con boiler.
See a simple manifold piping diagram here.
Comfort Calc
Pay special attention as at first look it appears to be p/s piping but is not.
I feel every and all boilers should be p/s piping.
The flow checks could be done away with if using IFC pumps.
 
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Old 12-16-15, 07:50 AM
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What is the particular reason that it is ok to have a pump on the return side but not a IFC pump?
 
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