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BillG · 01-26-18, 10:58 AM

Why do you need a 4-port? You should easily be able to do this with a standard 3-port valve. Hot water goes in one inlet, return teed into the other inlet, and circulating pump for the zone on the mixed outlet port.

01-26-18, 10:58 AM	#22
BillG Lurking Renovator Join Date: Jul 2016 Location: Minneapolis Posts: 16 Thanks: 2 Thanked 3 Times in 2 Posts	Why do you need a 4-port? You should easily be able to do this with a standard 3-port valve. Hot water goes in one inlet, return teed into the other inlet, and circulating pump for the zone on the mixed outlet port.