Jabsco electric conversion

[Bob 04 H260]

I just bought a boat with a new Jabsco macerator conversion system installed. The installer removed the vented loop from the head water supply line. It appears from the installation manual that the vented loop could cause loss of prime on this pump. I suspect that was why it was disconnected. Is there any solution to this problem ? Am I better off the to just toss it and install the Raritan ? I have very little tolerance with Jabsco products.
The boat has a 30 gallon holding tank with deck pump out, and macerator pump/discharge.
thanks, Bob

 

[gettinthere]

We have that, or something similar. We have an in-line shut off valve between the intake seacock & the head.
Serves 2 purposes; eliminates the need for syphon loop (if you normally keep it closed) and restricts how much water goes in the bowl. Ours has no other way of dry flushing the bowl.

Seems to work fine, and we use it every day

 

[efhughes3]

I've got a vented loop in mine, works fine....

 

[Peggie Hall HeadMistress]

Bob...If the vented loop was in the line between the thru-hull and the pump, it was in the wrong place--which may explain why the installer removed it. However, that wouldn't explain why he removed it altogether instead of moving it to the right place: between the pump and the bowl, which requires replacing the short piece of hose that connects 'em now. You need to put it back, but in the right place. And yes it would make a LOT more sense to replace the whole toilet with a Raritan SeaEra or any other toilet that has an average life expectancy that's longer than a season.

Gettinthere, if your toilet intake pump is an impeller pump, closing the valve to flush dry is destroying the impeller. If you keep doing that, the impeller will cease to bring in any water at all.

 

[gettinthere]

Peggy

How do I flush dry then? This has been working for several years, perhaps I have a different model?

 

[BillyK]

And yes it would make a LOT more sense to replace the whole toilet with a Raritan SeaEra or any other toilet that has an average life expectancy that's longer than a season.

I don't agree with this comment.. My jabesco has lasted years with zero trouble.. I know of many boats that's have these toilets and are fine for years. While they may not be over engineered like a raritan, they are servicing the need. your mileage may vary but with the proper use, care and maintenance they should be fairly trouble free. They wouldn't still be in the head business otherwise.

Peggie, i bought your book and you are considered an expert on these boards, speaking in absolutes like this reduces your authority for me on the topic.

 

[bria46]

I have a Groco Head. Origonally installed in 1986. I used their major rebuild kit twice over that period. It still works great!

 

[saltwaterlakey]

Does anyone know about the inflatable holding tanks that can be hardend to form in a confined space?

 

[Joe2954]

Related info - I have the Sea Era installed using freshwater flush, which uses a solenoid valve to supply flushwater. I installed a SPDT switch with off in the middle on the supply to the solenoid valve - it allows one to prefill the bowl on ON, switch to AUTO to flush and OFF to empty the bowl. If the Jabsco has a separate supply side pump from the macerator, you may be able to interrupt the connection to the supply side with a similar switch. My siphon breaker is immediately downstream of the solenoid valve and other than having to occasionally take it apart to clean it out it works fine.

The Sea Era is a good serviceable toilet but a bit noisy. However, I'm not sure any centrifugal pump with a macerator blade could be much quieter.

Joe