Toilet Cistern Hissing

[OPJ]

Hi all,

I noticed a while ago that my toilet is almost constantly hissing and, as I'd much expected, the system is constantly draining and refilling at a very low rate.

I'll include some photos:

(Yes, there was a small milk bottle in there!)

If I lift the ball cock manually, it doesn't completely stop the water from coming in.

Sorry, I'm not a plumber so I'm not familiar with many technical terms.

Another thing I've noticed is that after flushing with the valve switched off, it doesn't all drain away and you can see some blue bits left in the water as well.

If you can shed any light on why or how to stop the water coming in, I'd be very grateful.

Thank you for your time,

Olly

 

[inspiredvision]

Hi the hissing coming from this should just be the water passing the ball cran inside the cistern try tightening the small screw just at the end the float so it shuts off sooner as it fills this should stop it, if not you would need to change the inlet valve, part should be bout £15 and easy enough to change, the blue at bottom looks like what's left of a cistern block that's been used

Hope this is of help

 

[45yearsagasman]

Turn off the supply and undo the knurled nut near the blue spout and replace the washer that is inside the valve assy. Easily obtained from your local merchant for not a lot of money. If the repair fails then replace the complete fill assy with a Fluidmaster fill valve and you will have no further problems.
The design the flush valve prevents the cistern emptying completely, and its not a concern.

 

[Blagard]

You need to replace the Diaphragm washer. They come in different types so unless someone knows which one for yours take the old one with you for an exact replacement.

To access, turn off the water to the WC ideally use the isolation valve if one is fitted on the supply pipe below the cistern.

Flush the WC to remove water from the cistern and check no more enters.

Undo the big white plastic nut to the right of the blue water outlet pipe and carefully note how it goes together.

Remove the big rubber washer noting which way round it goes and go get a new one the same type.

Refit and you should be good to go.

One common type is
http://www.wickes.co.uk/ball-valve-diaphragm-washer-pk2/invt/421629/

Refit in the reverse order.

 

[Bosswhite]

I would guess someone has put " Loo Blue" in the cistern, dreadful stuff gunges up the diaphragm,
strip out the inside and fit a fluidmaster as suggested and a Flapper valve and you can forget about your problems.

 

[OPJ]

Hi and many thanks to you all for your replies.

I bought a couple of new diaphragm washers (they came in a pack of 2) last night but I've only just gotten around to looking at this, where I've noticed now that there's a slight crack in the screw thread 'housing', which basically means that the screw thread doesn't hold and just gets pushed back as the water raises.

This might well be something I've done while fiddling with it but, as it now looks as though I'll require a new float arm, I'm close to deciding to also replace the other part, as previously suggested.

 

[inspiredvision]

Try just adjusting the screw to were u need and a drop of super glue to stop it slipping back that should temp fix it in place so it will stop the flow of water as it rises when it fills back up after the flush, much simpler fix than changing the inlet just now

 

[OPJ]

Hi and apologies for dragging this one up again. But after today receiving my first water bill in this property (£200 for 4 months of living on my own!!), it's clear that I need to hurry up and do something about this.

I did attempt the superglue fix as suggested by inspiredvision but although it made some improvement, it wasn't strong enough to completely halt the constant trickle of water.

So, going back to the suggestion of buying and fitting a Fluidmaster valve...

Could someone please tell me whether I require one with a side or bottom entry? Thank you.

 

[inspiredvision]

Bottom entry

 

[OPJ]

Typical!

One last question - brass or plastic shank?

 

[dreadnoughtheating]

Brass. Every time, and while you are at the merchants, get a new 'rubber' (or whatever they are made of) sealing washer to fit between the inlet pipe connection and the brass shank. (remove the old one first....)

DH