Posted 1/12/2021 22:49 (#8746846 - in reply to #8746823) Subject: RE: Whole house tankless water heaters
SE SD
Flushing a tankless is not the huge of a deal.
YouTube it. Gear yourself up and just do it every six months.
As far as keeping the old heater hooked up for stand by.........
Think of haveing a spare car in the garage, let it sit for a year, then expect it to
Run when you hop in it.