Just bought first 5th wheel...2002 Keystone Montana. Had the intro briefing from service tech, but can't remember everything. On the monitoring panel, there is a switch for heater and pump. I understa...
It becomes much clearer when you recconize that city water by-passes the fresh water storage tank and pressurizes lines leading to facuets, water heater and toilet. The pump is there to pull water from storage tank and send it to facuets ect as needed when not connected to city water. While you are getting aquanted with your trailer you should ask someone to check for water heater by-pass and show how it works.