Toilet overfilling - what shall i do?

wazza

Hope the following makes sense.

The toilet system is approx. 8 years old. After flushing the toilet tank fills up as normal but the fill valve does not shut off completely when full. Excess water goes into the toilet pan. You can see water slowly dribbling in the pan.

I have a Torbeck valve fitted as shown in this link

http://www.toolstation.com/shop/Torbeck+Adjustable+Height+Valve/p32033

Had the same problem about 3 years ago. Replaced the diaphram washer which looks like this

http://www.toolstation.com/shop/Plumbing/Washers+Fixings/Torbeck+Diaphragm+Washer/d20/sd2703/p62694

which cured the problem. Today i installed a new washer but the problem exists. Now sometimes when the tank is full there is a 'hammering' effect at the valve.

I was thinking if ..

1. if the new washer is defective

2. maybe the torbeck unit is worn out. The washer has a plastic pin which moves in a hole in the valve body. Is the hole worn out?

3. if the body needs replacing is it best to use the same brand/design or can i use another design? This link shows diffenent designs. Mine is a bottom entry valve..

http://www.screwfix.com/c/heating-plumbing/fill-flush-valves/cat831618

4. Have a flexible pipe attached to the unit. Any idea what type of washer i need?

http://www.screwfix.com/c/heating-plumbing/plumbing-washers/cat831584


Thanks in advance for any advice given.

ariba10

I know it sounds elementary, but have you tried adjusting the float?

wazza

ariba10 wrote: »

I know it sounds elementary, but have you tried adjusting the float?

When i lift up the arm i can still hear water entering the tank. Lifting the arm does not shut off the valve

daveyjp

For £10 I'd fit a new valve assembly.

keystone

Ditch the torbec and fit a decent Fluidmaster.

Cheers

Wookey

When the float arm lifts up it pushes the pin inwards which in turn pushes the washer against an orifice, check the orifice for any small pieces of grit, the water hammer you say you are experiencing probably means the WC is mains fed, grit/dirt can enter the mains system when the water supply has been turned of for repairs. If there is dirt present then chances are the new washer may have been damaged and will need replacing again.

Dognobs

Do smaller poos.

ormus

id change the whole assembly.
and put a service valve in the feed pipe.
that way you can adjust the pressure somewhat. might stop any hammering.

wazza

keystone wrote: »

Ditch the torbec and fit a decent Fluidmaster.

Cheers

any particular model from the link i posted earlier?

keystone

wazza wrote: »

any particular model from the link i posted earlier?

840074 will do you but for preference I'd fit 81274. I'm assuming you have half inch tap connector. You should have an isolating valve but if you do throttle it back you'll only reduce the flow rate. The fill valves come with flow restrictors in any event which you can either leave in or take out depending on your circumstances.

Cheers

Canucklehead

Hi,

Did you clean the filter?

GSR.