This happened on my old boat as well- and I am a bit mystified.
Especially when hot water
tank is freshly hot, my shower
sink take a lot of running to get cold water
out. I'll have diverter handle on galley
sink all the way to cold and it will remain burning hot for 10-20 seconds until it finally runs cold. Then if I turn it off to wash more dishes, same happens. Water temps also fluctuate a lot in shower
when turning on and off at shower head
. I thought this was the mixer valve but same happens at shower where I have separate hot and cold water knobs. I have a single
water pump, and an accumulator tank.
Is hot water somehow backing into cold water plumbing
, needing to get flushed out? I'm a bit stumped on how (if at all) to fix this to prevent scalding and improve shower quality. Saving water would be nice also.