wkearney99
Guru
- Joined
- Feb 17, 2018
- Messages
- 2,164
- Location
- USA
- Vessel Name
- Solstice
- Vessel Make
- Grand Banks 47 Eastbay FB
The Jabsco pump in my Eastbay died, so I replaced it with the same model. Just unplugged the old hoses and wires and put in a new one. No other changes to the freshwater system at all.
When running cold water taps the flow is steady and the pump makes a consistent noise. When running hot (or any portion of warm utilizing hot) the pump seems to pulse instead of pumping steady. The flow itself is only slightly interrupted, it doesn't chatter at the spigot. But I can definitely hear the pump going on/off at about a half-second interval. There's also some dip in the 12v system, revealed by the lights dipping in time with the pump pulsations. This happens at any of the galley and head taps or shower heads. I did not try the hot/cold washdown at the transom.
I couldn't diagnose what failed in the old pump as the screws attaching the wet end (with the impeller/diaphragm in it) were stripped. Trying to drill them out fails as the housing plastic starts melting.
Since the problem only occurs when using hot water, I'm wondering if there's potentially a restriction or something that might be causing a pressure problem?
Anyone else run into a similar kind of problem? And found a fix?
When running cold water taps the flow is steady and the pump makes a consistent noise. When running hot (or any portion of warm utilizing hot) the pump seems to pulse instead of pumping steady. The flow itself is only slightly interrupted, it doesn't chatter at the spigot. But I can definitely hear the pump going on/off at about a half-second interval. There's also some dip in the 12v system, revealed by the lights dipping in time with the pump pulsations. This happens at any of the galley and head taps or shower heads. I did not try the hot/cold washdown at the transom.
I couldn't diagnose what failed in the old pump as the screws attaching the wet end (with the impeller/diaphragm in it) were stripped. Trying to drill them out fails as the housing plastic starts melting.
Since the problem only occurs when using hot water, I'm wondering if there's potentially a restriction or something that might be causing a pressure problem?
Anyone else run into a similar kind of problem? And found a fix?