Just wondering what type of failure you are anticipating. The only failure I might think about would be a rupture of an "old" Washing Machine hose. Replace the hoses every few years and you should be fine. BTW: Don't forget to hook up a
Ground wire from the washing machine to the copper pipe behind the faucet that the hoses are connected to. (To prevent galvanic corrosion at the metal hose connection.)
One other thing I just thought of: The way this valve works.... you must turn your faucet ON..then OFF, then ON again to get steady flow for normal use. Herein I see a problem with the washing machine which draws water according to its OWN programing..automatically. I wonder if there is some kind of programming for the
Valve to "work around" this, since the washing machine isn't human and doesn't know about the ON..OFF..ON required by the
Valve. The
Valve is on the Main Feed for the entire house.
$750 seems a little steep for a solenoid valve..even with a "controller". For some reason I would think such a
Valve would cost just a little more than heating system Zone Valve. I would NOT consider using a "Polymer" valve.
NB