Still need some help on the hot water issue. Left the rally and returned to the resort in Foley Alabama and hooked up as usual with electric and CITY water. Cut the shower water on and hot and cold ...
Showers have flow restrictors....pump pulsates due to low demand Hot/Cold fluctuates due to variances in pump flow Remove the restrictors for better flow (in end of hose or shower handle...if not removable drill them out sing 1/4" bit)
Or install an accumulator tank on pump discharge to even out pump flow