Short story, my 571-2 taco zone valve end switch stopped working, so for the $12 difference in price of solenoid or complete valve, I bought this. Switched power heads, but end switch will not work with new power head; but put new power head back on new body and the end switch works ? So this seems to mean there is always a chance you cannot just replace a power head and the end switch will work ? For information, the end switch is only connected to one side of 24 vac terminal 3, for wire connection to cheapen out on a 4 th terminal. so short of shorting out to ground the end switch, it will operate independently. Probably will go back to a Honeywell zone valve in future. UPDATED; tried again and the end switch started working ? Thinking oxidize contacts sitting in stock .

It's good

Just needed the top. Replaced old valve which died after 20 years.Simple to do. No plumber needed!!

My business uses a lot of these zone valve power heads and the price is the best around

Perfect

same as i remembered

Good service and quality

so it performed as expected My plumber told me when he installed the system that is extremely rare that the valves go bad but just in case I ordered a complete valve and head My plumber was right it was the head so I was able to replace it in about 10 minutes I have a spare valve the bottom part) if anyone needs one

a little disappointed that i had to buy the whole assembly when i only needed the electrical part but it worked so im satisfied with it

Just what I needed

Same product as our big box store but the entire unit for the price of just the control coil

Installed 2 of these on my boiler to seperate first and second floor heating Works fine One did get stuck in open position so I had to open the valve and adjust it manually So far working great

What I expected

Replacement for original Good price Fast service