Jabsco Toilet - How Hard?

[langstonelayabout]

Yes, it should be very easy. Mine requires a little more pressure since I fitted a syphon break on the inlet side, requiring a lift of a foot or two, but this hasn't been commented on by others using it.

When replacing the Jabsco T&L head on a previous boat I installed the siphon break and above waterline pipe that the surveyor had demanded.

I also made the mistake of installing the inlet with the siphon break at the same height. It seemed so easy whilst ashore in the boatyard.

Launch day +1. Pumping the new head through the new piping was a total basket. Hard work was an understatement. I read the Jabsco instructions again...

I then removed the siphon break and loop on the inlet and ran it straight from the seacock to the head. What a difference! I'll never make that mistake again.

 

[LittleSister]

When replacing the Jabsco T&L head on a previous boat I installed the siphon break and above waterline pipe that the surveyor had demanded.

I also made the mistake of installing the inlet with the siphon break at the same height. It seemed so easy whilst ashore in the boatyard.

Launch day +1. Pumping the new head through the new piping was a total basket. Hard work was an understatement. I read the Jabsco instructions again...

I then removed the siphon break and loop on the inlet and ran it straight from the seacock to the head. What a difference! I'll never make that mistake again.

I'm not clear from your description whether or not you eventually realised this, but the inlet siphon break should be between the pump and the bowl (i.e. under pressure when pumping), not between the seacock and the pump (under suction when pumping).

The outlet siphon break does go between the pump and the outlet seacock, however.

The siphon valves should close under the pressure of pumping (and not spurt water or worse), but open under suction (i.e. when pumping stops) allowing air in (sucked in by the liquid level in the pipes falling under gravity) to break the siphon.

(Note that Lavacs have a different arrangement, though.)

 

[prv]

I also made the mistake of installing the inlet with the siphon break at the same height. It seemed so easy whilst ashore in the boatyard.

Launch day +1. Pumping the new head through the new piping was a total basket. Hard work was an understatement.

Dunno what your problem was; I have loops up to just under the side deck, so about shoulder height to someone standing on the cabin sole, with anti-siphon valves on the tops of them. The toilet pumps smoothly and easily.

The only slight downside is the need for 20 strokes to push everything out to sea because of all that up-and-down pipe, but on the positive side it's totally safe from any in-flow without having to mess about with seacocks.

Pete

 

[WestWittering]

I replaced mine last week - semi - not full pump replacement. £29 for the kit with all the good bits in, you keep your plunger & top section.
You will need a flathead screwdriver and a bucket.

Undo 12 screws, stand about in diluted urine for about 10 minutes while you swap it all over and tis done. If you can’t get the two hoses off the fittings (as I couldn’t) check you have enough to retain your loop & cut them off with a kitchen devil at the end of the fitting.

I was so proud of myself I treated myself to a brew in the ‘Engineer’ mug. And a foot shower.

Dianne

 

[Dull Spark]

Before you start to strip out piping, it may be worth going over the side with a wire brush and scraping off any barnacles from the through-hull fittings. Good luck!

 

[Daydream believer]

Undo 12 screws, stand about in diluted urine for about 10 minutes

to retain your loop & cut them off with a kitchen devil at the end of the fitting.

I was so proud of myself I treated myself to a brew in the ‘Engineer’ mug. And a foot shower.

Dianne

Standing in urine is a new one on me --Was all this the result of the blood moon the other night?- .:ambivalence:
Some people start by flushing loads of fresh water& disinfectant though first. But whatever turns you on !!!