Replacing toilet syphon...

Shimmyhill

Shimmyhill

Shimmyhill

Soldato
Joined
26 Oct 2002
Posts
4,171
Location
Norwich
The toilet doesn't flush properly and i know it's the syphon, i have already replaced other parts before but not this one - i didn't realise until i looked up some how to guides that i need to take the whole toilet apart to do it :(

I have a new syphon, got a recommended one that can be serviced without taking it apart, and the new coupler bit but i am putting the job off - anyone done it did you use silicone to help seal or not?
 
Mine just kept dripping the first time so I had to take all out again and seal it so I would recommend you do. Bit of an awkward job but not the worst.
 
Shouldn't need silicone if you get a new coupling kit. Make sure the donut is well seated and not over tightened and it ought to seal OK.

Not a bad job overall. Bit of a pain but doable.
 
I've done this before and the hardest part was lining everything back up to be parallel with the back wall.

Try to avoid getting the thin metal coupling plates as they can bend when tightened. Metal ones in general are also prone to rust.

I used a plastic one which won't rust but it was thicker than the metal ones by quite a bit so raised the cistern higher than it was before meaning when it came to screwing it into the back wall I had to put the screws in at an angle.
 
I replaced the exact same just yesterday.

I ended up getting Fluidmaster 1/2" Brass Shank Valve as well as

Fluidmaster Lever Dual Flush Valve

and finally

Close Coupling Kit Metal.

all from Toolstation

After 30 mins of sawing through the old coupling nuts, it was easy to replace the old for new.

My only issue with the install was the the spongy ring, as part of the kit from Toolstation was to large, so I had to go to B&Q to get a smaller one.

I would suggest getting the thing apart before buying the kit, because as others suggested you need the right size kit.

I thought about the plastic coupling kit from B&Q, but it looked a bit thin and weedy.

My only issue is with the system is the amount of water now going into the pan, even on the lowest settings for both full and half flush it puts out quite a bit of water.

Jon
 
If you have space inside the cistern, put a plastic bottle filled with water in there and it will reduce the amount of water used each flush. A brick would do the same job too.
 
I've done it before, probably a thousand times..

Turn the water off and take your time, make sure the shop is open while you're doing it in-case you need to run away for parts..

Sometimes they're straight forward and other times they aren't..
 
Cheers, i have a new close coupling kit but i cant find my adjustable spanners to get to the bolts..... perfect excuse to delay it again!!

I have sprayed the wing nuts so will let that soak in....
 
One other thing to check - if the syphon is a different shape/size to the old one, make sure it doesn't foul the ballcock. I replaced mine and ended up having to replace the fill valve assembly as well, as the old one was getting stuck open :(
 
I have already changed the fill valve thing and got a new fangled one without a ballcock!

Still putting the job off, i did realise i dont need to disconnect the fill valve from underneath as i fitted a flexi pipe!
 
Are there different sizes with the rubber washer/bung with the closure plate?

It sits high, the cistern doesnt rest on the pan - just sitting on the rubber bung bit??
 
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Yeah it may be raised a little. Just make sure it's perfectly centred and you tightened the wingnuts equally so one side isn't any higher than the other.
 
With the old setup there was no gap, looks like the bung is foam on the old one - it is a Trent toilet and would appear they use a setup that some use with a foam washer that is much smaller.
 
Yeah my new washer was a lot bigger than the old one. It's not a problem so long as it seals even and you can still screw the cistern to the wall.
 
Imy said:
Yeah my new washer was a lot bigger than the old one. It's not a problem so long as it seals even and you can still screw the cistern to the wall.
Click to expand...

The issue i have is that the over flow pipe is a weird setup, pipe goes into it and plastic nut screwed over it and clamps it down - the inner pipe isn't long enough for this to happen :(
 
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