We've only used our pump during travel to flush and wash hands. But we've spent several vacations on sailboats which have fresh water tanks and pump similar to our TT's. House rule, turn it on when needed. One trip the pump was on all night, water heater developed a leak and one of the fresh tanks (there were 3) was pumped into the bilge. Good news was the bilge pump pumped the water overboard. Bad news, we lost 1/3 of our water and house battery was low. IMHO, on as needed.
2013 F-350 CC SB 2WD 6.7PS
2013 Eagle Premier 351 RLTS
-SOLD- 2012 X23B
-SOLD- 2003 Ford Expedition 5.4, Bilstein shocks