The bypass valve allows you to isolate the softener for maintenance without cutting off the home's water supply. How to Install a Water Softener in 9 Steps | Aquasana
Connect the hose from the softener's outlet port back to your "soft" water internal plumbing. harvey hv3 water softener installation manual free
The HV3 is unique because it uses water pressure to operate (rather than electricity), but this demands specific placement: The bypass valve allows you to isolate the
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