3/4" Geo-Sentry GeoThermal Zone Valve Normally Closed (Threaded)

This valve helped quiet down a noisy geothermal system where the original installer used a pilot operated solenoid valve connected to undersized piping. The high water velocity in the 3/4 piping would cause a pronounced water hammer throughout the home whenever the old valve closed. This slow open and close TACO valve was the least cost option compared to replacement of the entire supply and discharge piping. No more water hammer and a now, a new a customer who can get a nights rest without a disturbing Ka-Thump every 15 or so minutes. From experience, if using any form of a motorized water valve it is best to keep a spare power head on your shelf as an emergency replacement. These motors get a great deal of cycling wear and eventually need to be replaced. With Geothermal systems if there is no water flow there is no heat or AC and you are left only with emergency heat or no AC. So; be certain to order a replacement power head for the same style valve and pay close attention to the designation for "normally open" and "normally closed" as this valve will use a "normally closed" power head.

I use this ball valve on my geo-thermo system. Exactly what this valve was designed for. Before switching to ball valve I used regular Taco seat valve which lasted just between 6 and 12 months. This one costs twice as much and lasted 3 1/2 years at relatively rare usage. Better than seat valve but still insanely short term for ball valve which opens/closes in average about 5 times per day in my case which amounts to roughly 6000 opening/closing lifespan of valve. I guess at more active usage this special geo-thermo valve would not last more than a year. Unfortunately, I didn't find anything better available for my WaterFurnace. This is pretty strange because ClimatMaster provides their own valve which lasted at my neighbor system already 9 years and counting. Shame to WaterFurnace and shame to Taco.