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Taco's 550 Series heat motor zone valves are designed for high-head capacity applications such as high-rise residential and commercial buildings. Heavy-duty construction enables this series to operate up to 150 feet of pump head. They are available in 1/2" - 1" sweat connections.
Taco Heat Motor Zone Valves provide a convenient way to create individual zones or equipment isolation in a hydronic heating system. Utilizing one pump along with multiple zone valves, flow can be started, stopped, or diverted through the system to provide individual room or area comfort control and energy savings.
Reviewed by 1 customer
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Comments about 1" Sweat 557 Heat Motor Zone Valve:
I replaced existing (old) zone valves in my home heating system. The new valves were exact replacements for the Taco valves that were originally installed in the house (since 1965). I hope these last 50 years also.
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Q:Do you sell only the head and can the head be replaced without draining the system?
A:Yes. You will need part 555-050RP ( http://www.pexsupply.com/Taco-555-050RP-Zone-Valve-Power-Head-Series-570-3708000-p ). You will not need to drain the system.