Two way zone valve

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James Ascherl

Member
Jun 6, 2010
78
Hinckley, Ohio
I have installed a Taco 573-2 zone valve at the top of my storage. Water will flow both directions depending on whether the tanks are charging or the demand is from storage. The valve has a directional arrow on it. Which way should I install it?
 
If it has a directional arrow, then is is designed to flow one direction. Most two way zone valves are designed to shut off against flow with a spring return or thermo electric operators. Those big, boxy White Rogers 1311 could possible flow either direction. It has a slotted spool and motors open and close.can

A three way zone valve can flow one of two different directions. Or a motorized ball valve could flow either direction.

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