Toilet syphon completely foxing me!

[The Plumber Guy]

My customer had a broken diaphragm on a syphon that operates with a handle at the front of the cistern. Instead of replacing the plastic part he changed the entire syphon - 3 times - but the same thing keeps happening. When you pull up on the wire the syphon works but it doesn't dump the water from the cistern. Instead it just trickles out like a newer syphon that overflows into the pan until the water has been used, then it stops and refills fine.

For the life of me I can't work out why the syphon only works to a certain extent. One thing I've noticed is that when you flush water comes out of the rod housing (the rod on the diaphragm pull) and I think this should go down the syphon - but this has happened on all 3 new syphons.

Any takers?! Hopefully it's just me having a long day and overlooking something obvious.

 

[SimonG]

Is it low level or close coupled?

 

[Resolute]

Is the plastic from the old diaphragm blocking the flush?

 

[PlumbersMate]

Check outlet on siphon could be blocked and check that the plastic cap is inserted which converts from 6L flush to a 9L flush. But my guess would be that the actual siphon has a blockage or the outlet on the pan where the siphon sits through (where your doughnut sits)

 

[kirkgas]

If the syphon has been changed then changed again it's unlikely to be faulty, if the first one failed because the diaphragm was damaged it's likely that there is a piece inside the pan, take the cistern off and pour water into the pan at the doughnut, if it's clear it will pour round the rim like a flush, if it backs up it's blocked, sometimes pouring the water in here dislodges the bit of diaphragm (or lid from bic type razor) you might need to poke around in it to dislodge the blockage

 

[Phil]

Water level not high enough?

 

[Resolute]

Let us know what the fault turns out to be!

 

[Rybo_1]

I had a similar problem, replaced a siphon but it wouldn't flush properly. On the end of the old siphon was something that appeared to be redundant. Turned out it was along the lines of a dip tube which helped the water flow into the bowl. Can't remember the exact name but solved the problem. Could be an idea

 

[The Plumber Guy]

Is it low level or close coupled?

It's low level.

 

[Phil]

I had a similar problem, replaced a siphon but it wouldn't flush properly. On the end of the old siphon was something that appeared to be redundant. Turned out it was along the lines of a dip tube which helped the water flow into the bowl. Can't remember the exact name but solved the problem. Could be an idea

Not at all redundant......it was a syphonic aspirator which is needed to clear the bowl properly.

 

[stani]

It's a syphonic toilet.

 

[PlumbersMate]

I've found siphonic toilets back up when flushed and not replaced properly, not empty cistern slowly IMO

 

[stani]

Customer has replaced the syphon 3 times and probably thrown the old bomb away. It would be really really bad luck to get 3 new syphons all failing, still reckon its a syphonic.

 

[The Plumber Guy]

It's a syphonic toilet.

Any chance you could tell me a bit more about syphonic toilets please? Apologies for my lack of knowledge!

 

[stani]

http://www.ukplumbersforums.co.uk/plumbing-forum/12229-syphonic-double-trap-toilet.html


Try this link it's not bad at an explanation.

 

[SimonG]

....and the clock is running to see if you can fix it quicker than the last syphonic thread

 

[helpsy]

Had toilets before where entry into the pan from cistern is shallow and the flush valve or syphon protrudes to far and limits the spread of fluid. Fix cut down the threaded tube.

 

[The Plumber Guy]

I'm replying to everyone - hopefully as I'm not quite sure how this page works yet - just to say thanks for your help with the syphon. It's sorted now and the reason it didn't work was... the pipe and pan were blocked by components of a mobile phone!! Absolutely NO idea how that happened

 

[Dotty]

You only need write it once PG.....

 

[rpm]

I'm replying to everyone - hopefully as I'm not quite sure how this page works yet - just to say thanks for your help with the syphon. It's sorted now and the reason it didn't work was... the pipe and pan were blocked by components of a mobile phone!! Absolutely NO idea how that happened

Well I`ve heard of a "Burn phone" but that`s a new one on me!

 

[kirkgas]

I'm replying to everyone - hopefully as I'm not quite sure how this page works yet - just to say thanks for your help with the syphon. It's sorted now and the reason it didn't work was... the pipe and pan were blocked by components of a mobile phone!! Absolutely NO idea how that happened

1/2 point for me with "lid from BIC razor or similar"
Thank you

 

[SimonG]

Its the new internet toilet. You can flush it from anywhere with your mobile

 

[PlumbersMate]

1/2 point for me with "lid from BIC razor or similar"
Thank you

I get the other 1/2, that mean we only get a single whiskey each?

 

[Ermintrude]

Its the new internet toilet. You can flush it from anywhere with your mobile

Not quite that simple mr G!

You need the BG hive
BG sanitary appliances annual service contract
BG platinum controls package
BG app and annual subscription for the IT support
And the £5000.00 armature gas loo. With I pad doc and LED illumination

 

[PlumbersMate]

Not quite that simple mr G!

You need the BG hive
BG sanitary appliances annual service contract
BG platinum controls package
BG app and annual subscription for the IT support
And the £5000.00 armature gas loo. With I pad doc and LED illumination

and Kyle has to get first use