Plumbers? - Toilet continuously "overflowing" into pan

[DorsetDude]

My bloody lavatory is overflowing into the pan again, thought Id fixed this a year or so ago.
Its a close coupled loo. Ive lifted the lid off the cistern when its doing it and the level of the water is high enough that water is going down the overflow which discharges to the bowl.
If I close the isolator water valve to the cistern, the flow stops. So it seems to me to be the input valve not stopping the water when the float is at top.
So do I just need yet another input valve to cure? Or maybe can the current one be cleaned out or something?

Cheers all.

 

[Steep]

Check the float is sound and doesn't have water in it, other than that I'd say yes, a new valve/float assembly.

 

[ecoleman]

You should have a screw on the float arm that adjusts the arm level. You need to adjust that so that the float closes the valve quicker.

 

[canonrebel]

You should have a screw on the float arm that adjusts the arm level. You need to adjust that so that the float closes the valve quicker.

or bend the arm slightly

 

[stryvya]

or fit a new washer.

 

[DorsetDude]

or bend the arm slightly

Its plastic dont think I can. Hoping there is an adjustment screw as ecoleman says.

or fit a new washer.

Where does the washer go? Inside the inlet valve plastic pipe thing somewhere?

 

[ecoleman]

5397007127591_01c by ecoleman on Talk Photography

 

[DorsetDude]

[QUOTE="ecoleman, post: 7910003, member: 184]
5397007127591_01c by ecoleman on Talk Photography[/QUOTE]
Thanks, My arm though has a float that travels up and down the outside of the pipe if that makes sense.
Like this

 

[mrgubby]

The rod on the right is threaded and adjusts the float height

 

[ecoleman]

That's a small image, but I would guess that the shaft on the right may be adjustable to set the float and the washer would be inside the top cap.

 

[stevewestern]

Do you have hard water - limescale can build up which causes the float to get stuck at times.
Have a look in the cistern, and if it is a bit scaled up then turn off the valve, flush the toilet and squirt some viakal or similar around the float mechanism to dissolve the limescale.
Otherwise, the replies above should sort you out..

 

[Nod]

DORSET in Keith's user name hints at a hard water area.

https://www.amazon.co.uk/Ecozone-Limescale-Treatment-AllergyUK-Certified/dp/B002HORFJ6 might help reduce the problem but an inline water descaler in the supply would be my choice.

 

[Box Brownie]

Perhaps this site and video will help???

http://www.fluidmaster.com/products/toilet/fill-valves/400a-universal-fill-valve/

If not maybe they can advise you?

PS FWIW we have the type in post #7 and I have changed the diaphragm washer approx 4 times over the past 12 years to overcome loss of flow as the rubber they are made of ages and no longer "move" like it does when brand new.

 

[DorsetDude]

Took the inlet valve out and got the top bit off last night to expose the seal. Washer/seal looked ok but gave it a gentle scrub and also the seat. Put it back together and now seems to be working again. Probably temporary fix but thanks all!

 

[stevewestern]

Should have said earlier, but a smear of grease (I would use white lithium grease, but that's 'cos I have some) may help keep things working now you've cleaned it up..

 

[Matt-]

Is yours the fluidmaster one as you put in the pic? Isolate the water if you have a valve at the inlet to your wc, if not, isolate at your main stopcock and flush the toilet to make sure it doesn't refill.

If it is that model, just below half way up from the bottom is a black ring (height adjuster). You can pull that up, then pull the whole valve up and out.

You will need a new Fluidmaster inlet valve so you can slot it straight back on whole, or buy a Fluidmaster washer which you can replace. Unhook the arm and pop the black cover off and you'll see where to fit the washer, make sure it's free inside from any little pieces of debris. Then put back together and push the ring down to hold it in place.

 

[Matt-]

Bloody hell, just replied above, then read the two posts above mine Glad you sorted it!!