How to turn off water to a back to wall toilet?

[Crfb]

Hi, we need to fix the flush in our back to wall toilet, the part the fills water into the cistern is running really slowly and spraying water. I was planning to buy a new part, but first I need to drain the cistern and I can’t work out how to find the inlet pipe to turn off the water? It’s a vitra s50, and its fits onto the wall, so the pipes aren’t visible. Does anyone have any advice please? Thanks!

 

[Koolpc]

Official Website | VitrA UK | Inspiring Bathroom Solutions

Discover VitrA's premium bathroom solutions - from sleek sanitary ware to elegant tiles. Transform your space today. Click to explore our collection!

www.vitra.co.uk

 

[terryplumb]

Have you got access to below the cistern to look for an isolation valve ?

 

[Crfb]

Hi, no I haven’t the toilet pan fits directly onto the wall

 

[Crfb]

Official Website | VitrA UK | Inspiring Bathroom Solutions

Discover VitrA's premium bathroom solutions - from sleek sanitary ware to elegant tiles. Transform your space today. Click to explore our collection!

www.vitra.co.uk

Thanks, I’ve looked on their website, but I’m still non the wiser

 

[terryplumb]

Show us some pics of your set up particularly what access you have to the cistern.

 

[Crfb]

 

[yorksbuilder]

You may be best to turn your water off at the stopcock to investigate the cistern issue

 

[terryplumb]

Unfortunately,with that type of toilet you have to free up the toilet pan from floor and wall ,then pull it forward ( away from wall) to be able to replace the float valve. Once away from the wall several inches you will see the isolation valve ( assuming one is fitted ,which they invariably are). In the unlikely event that an isolation valve hasn't been fitted,turn off the mains cold water stopcock ,and fit one .

 

[Elkato531]

If the cistern is filling really slowly and its spraying, it is likely to be a Siamp fill valve. Does it look like this one?

SIAMP 99T Bottom Entry Inlet Valve with 1/2" Brass Connection Thread 30992110

an be installed into ceramic or plastic cisterns, as a replacement for a pre-installed products from Vitra, Twyford, Lecico, Roca and many more

www.plumb2u.com

If it is this one, just change the washer. Simple job

https://www.screwfix.com/p/arctic-hayes-siamp-diaphragm-washer-29mm/5006j

Turn the water off first though.

 

[Mottie]

Unfortunately,with that type of toilet you have to free up the toilet pan from floor and wall ,then pull it forward ( away from wall) to be able to replace the float valve. Once away from the wall several inches you will see the isolation valve ( assuming one is fitted ,which they invariably are).

That’s how mine is fitted. Isolation valve onto a flexi pipe with a flexible pan connector. Slide it out a bit, turn the water off and do the reverse when refitting it.

 

[Rodders53]

Probably much easier to turn off the water at the main stop tap, rather than breaking the sealant and all that palaver if it's not easily accessed.

Swapping a Siamp diaphragm washer takes a matter of a few minutes. {I had to do two of mine in quite quick succession, recently.}
Other similar torbeck style valve diaphragms the same.
Hardest part was undoing the plastic 'nut' on one of the two. Use a smear of silicone grease on the threads when re-assembling for the next time.

DO check what is fitted in the cistern first and get a washer ready to do the change in case it's not a Siamp.

 

[Crfb]

Thanks everyone! I fixed it by turning off the water at the mains and replaced the siamp diaphragm, which fixed it. Thanks again!