New Jabsco toilet

[Cspirit]

I’m currently refitting my new-to-me LM27 motor sailor and I’m replacing the toilet with a new Jabsco. The existing toilet had no plumbing loops above the waterline for both inlet and outlet due to the design of the heads - there’s no room to fit these. The previous owners did not report any backfilling of the toilet, and since both heads seacocks were frozen I guess that was the case. I have looked hard at the possibilities of installing siphon break loops to the pipes but sadly I don’t think that this is possible .

So, given that I don’t want to rely upon the valves in the Jabsco, I intend to install further gate valves in the plumbing in both inlet and outlet pipes, close to the toilet seat. Users will have to close/open the valves before and after use, but i feel that this inconvenience outweighs the safety factor. I suppose I could experiment by leaving the valves open to see if the heads floods, in which case I’ve just wasted the cost of two valves....

Does anyone think that this idea is impractical or ridiculous?

 

[vyv_cox]

Gate valves are not recommended for seawater service (unless they are in a more corrosion resistant metal than brass). The gate fouls easily and the small stem between the gate and the wheel dezincifies, with the result that the valve fails closed.

Also, you cannot tell if the valve is open or closed, unlike a ball valve.

 

[Cspirit]

Apologies Vyv but I should have said ball valves....

 

[vyv_cox]

The need for loops depends upon the height of the toilet above the water line. If it is well above so that it cannot be flooded when heeled it is acceptable not to have loops. My discharge has a loop as it goes into the holding tank but none on the suction side.

 

[RupertW]

The need for loops depends upon the height of the toilet above the water line. If it is well above so that it cannot be flooded when heeled it is acceptable not to have loops. My discharge has a loop as it goes into the holding tank but none on the suction side.

I’m the same but have always been a bit concerned about flooding when heeled from inlet as the bowl is well below the waterline when heeled. It never has shown any signs of flooding whether the twist and lock is locked or not.

 

[bluerm166]

I don't think I would want to leave the frozen valves in place .
Preferable to make them serviceable or 'simply' replace them,whether you add more convenient valves or not.

 

[Plum]

I’m currently refitting my new-to-me LM27 motor sailor and I’m replacing the toilet with a new Jabsco. The existing toilet had no plumbing loops above the waterline for both inlet and outlet due to the design of the heads - there’s no room to fit these. The previous owners did not report any backfilling of the toilet, and since both heads seacocks were frozen I guess that was the case. I have looked hard at the possibilities of installing siphon break loops to the pipes but sadly I don’t think that this is possible .

So, given that I don’t want to rely upon the valves in the Jabsco, I intend to install further gate valves in the plumbing in both inlet and outlet pipes, close to the toilet seat. Users will have to close/open the valves before and after use, but i feel that this inconvenience outweighs the safety factor. I suppose I could experiment by leaving the valves open to see if the heads floods, in which case I’ve just wasted the cost of two valves....

Does anyone think that this idea is impractical or ridiculous?

as other have said, no loops are needed if the bowl is above the heeled waterline. I recommend you do the job properly and replace the frozen valves with proper marine ball valves (eg DZR material from ASAP Supplies) so that they can easily be closes (and checked) easily. I always close seacocks after every use of the heads so in theory I could do away with a vented loop.

www.solocoastalsailing.co.uk

 

[Cspirit]

Thanks - I have replaced all the boat’s seacocks with Trufit apart from servicing two Blake’s for the toilet.
Bob

 

[Cspirit]

Correction - TruDesign!

 

[LadyInBed]

This one doesn't look to have loops afaict
LM27 motor sailer archive details - Yachtsnet Ltd. online UK yacht brokers - yacht brokerage and boat sales.
Is your heads in the same place?

 

[Cspirit]

Yes, same place (but the sink is a less lurid colour...). I’ve measured and I’m sure that the toilet is below the waterline & certainly so when heeled. I’m installing additional ball valves next to the toilet to be closed after every use, since the hull Blakes seacocks are not easily accessible although they work perfectly and will be turned off when leaving the boat. I’m sure that all this is belt and braces, but its a cheap insurance. Bob