Originally Posted by FirefightinLV
Over the winter I drained all the line and to begin the season I sanitized the system. We are getting very low water pressure and the pump will kick on every 45 seconds or so to build pressure. No leaks so thinking I have some air trapped in the system. I have ran 2 tanks through and flushed every faucet and line I could find.
I also attached to city water and flushed again. Any ideas?
Also where is the water pump located. It sounds like its in the rear of the trailer assuming under the bunks.
How's the filter on the inlet side of the water pump?
Even if you have air in the system, since it's a closed system, the water pump will pump up the pressure--including pressurizing any pockets of air--and then turn off...sealing the existing pressure in the system. The only way the water pump will then detect a pressure change is if there's actually a reduction of pressure somewhere in the closed system. If there were air in the system, it would have to cool (and shrink in volume) drastically in order to spur the pump turning on consistently every 45 seconds. Not a realistic scenario. I also doubt you have any appreciable air left in the system after running 2 tankfuls of water through it. What's that...somewhere close to 60 gallons in the 185 Baja model?
If I knew for sure that I didn't have any water leaks, then I'd be looking at a pump failure: The valve is allowing water to bleed off backward through the pump which makes the pump turn on and pump the pressure back up. The fact that the pump is also giving you low pressure while in operation would also make me lean toward pump valve/seal failure.