anti syphon bend erupting

[trowell]

Is there a fault with my toilet installation. My outlet antisyphon emits spits of sea water with each pump of the toilet handle with dire future consequences if I dont get it right. Should the valves be tightened down; are they removable simply to replace perished rubber valves? The bowl doesn't seem to get much water into it; some of the porcelain remains dry...any clues greatly received. Thanks

 

[sarabande]

Spitting

either partial blockage of the outlet pump valve or seacock, or the valve seat/disc is dislocated.


in all cases, it's a mucky but satisfying job to fix it.

Not filling

Seat Suction seal failing
Pump seals failing
Inlet seacock partially blocked
Rim channel blocked


In all cases, it's a mucky......

 

[sailorman]

The a/s hole should be very small. About 1/64 '

 

[Chris_Robb]

The a/s hole should be very small. About 1/64 '

I am not sure what you are referring to

 

[NormanS]

Is there a fault with my toilet installation. My outlet antisyphon emits spits of sea water with each pump of the toilet handle with dire future consequences if I dont get it right. Should the valves be tightened down; are they removable simply to replace perished rubber valves? The bowl doesn't seem to get much water into it; some of the porcelain remains dry...any clues greatly received. Thanks

I thought the wee hole (antisyphon) should be on the inlet pipe. I would think that any hole on the outlet pipe would have predictable, and dire, results.

 

[sailorman]

I am not sure what you are referring to

LAvac anti siphon of course

 

[VicS]

What type of toilet are we talking about?

A Lavac does NOT have a vent in the outlet pipe, it just has a pin hole in the inlet pipe ... but who said it was a Lavac ?

 

[misterg]

On the anti-syphon valve, is it something like this?

If so, the valve (knobbly bit on the top) is probably clogged with crud. You might be able to get it to work satisfactorily by dismantling it and cleaning it. Service kits are available for the Jabsco item (probably others, too) for a few £.

On the inlet side, you could have a problem with the pump, a blockage in the inlet pipework, a blockage in the channel in the toilet pan, or a similarly leaky anti-syphon valve in the inlet pipework. (Or maybe that's just the way it is !)

Andy

 

[jfkal]

Valve

The idea is: It should close when you pump . And open (breathe) when you are not, in order to break the siphon effect. No more no less. Probably clogged with debris. But as long as water or whatever else spills out, air should be able to get in also. So. No immediate danger but put a valve replacement/cleaning job on the priority B list.

Is there a fault with my toilet installation. My outlet antisyphon emits spits of sea water with each pump of the toilet handle with dire future consequences if I dont get it right. Should the valves be tightened down; are they removable simply to replace perished rubber valves? The bowl doesn't seem to get much water into it; some of the porcelain remains dry...any clues greatly received. Thanks

 

[rob2]

It may help to remove it and submerge it in vinegar for a week, that should clear out any calcium deposits but won't help if its an acidic build up such as happens in urinal traps.

Rob.

 

[trowell]

ok... so next

What type of toilet are we talking about?

A Lavac does NOT have a vent in the outlet pipe, it just has a pin hole in the inlet pipe ... but who said it was a Lavac ?

i was instructed to install an anti syphon bend like the one pictured in this thread on both the inlet and outlet. i went to the boat yesterday and blocked both valves with my fingers and when pumping, the water throughput was absolutely fine.

Conclusion:no blockages anywhere.

The valve on the outlet could perhaps be replaced with a "U" bend connection and to hell with the antisyphon at this point. But will I potentially get a syphon effect on the outlet side?

What concearns me, however, is the fact that my recent surveyor concluded commented that the installation was sound. I s he wrong?....

so I still seek combobulation

 

[snowleopard]

A leak from the anti-syphon valve on the outlet pipe indicates a fault in the valve. Unscrew the cap and clean it out. If the rubber valve is defective replace it. If it functions correctly it should close when pressure is applied and open when it is released.

A common type of valve is a short length of rubber tube with the end flattened like a miniature joker valve. A bit of crud holding the flattened section is the most likely fault.

 

[rob2]

On a DIY note, I used to have a car brake bleeding tube (neoprene) which had a stud blocking the end and lengthwys slits near the end. This was a very effective one-way valve and could be used on anti syphon bends to great effect!

Rob.

 

[Stemar]

On a DIY note, I used to have a car brake bleeding tube (neoprene) which had a stud blocking the end and lengthwys slits near the end. This was a very effective one-way valve and could be used on anti syphon bends to great effect!

Rob.

If I've understood correctly, that would work in the opposite way to the anti-syphon valve - it would open under pressure - when pumping - and close when sucking - syphoning. Not quite the desired result!

 

[VicS]

i was instructed to install an anti syphon bend like the one pictured in this thread on both the inlet and outlet. i went to the boat yesterday and blocked both valves with my fingers and when pumping, the water throughput was absolutely fine.

Conclusion:no blockages anywhere.

The valve on the outlet could perhaps be replaced with a "U" bend connection and to hell with the antisyphon at this point. But will I potentially get a syphon effect on the outlet side?

What concearns me, however, is the fact that my recent surveyor concluded commented that the installation was sound. I s he wrong?....

so I still seek combobulation

BUT what type of toilet is it ???????


Is it a Lavac or is it not a Lavac.

IF is is a LaVac then install it exactly according to the instructions ( on the website) with a pin hole only at the highest point in the loop in the inlet pipe and nothing in loop in the outlet pipe.

If it is any other type
Follow the instruction for that.
Any anti-syphon vent in the outlet must be in good condition and close properly or it will spray you with sh*t.
An antisyphon vent on the inlet must go in a loop between pump and bowl. If it is between inlet seacock and pump then it will always let air in and the bog wont flush.