Toilet not filling up enough

[spottydog10]

Hi everybody, nice to be here.

The toilet is maybe flushing 1 in every 10 attempts and it looks like it's the amount of water in the tank.
If I pushdown on the float to fill the tank up further, it usually flushes OK.
I understand there is a screw that regulates the amount of refill water but I have that turned to the right as far as it will go.
Any advice on this please?
I'm no plumber so a simple explanation or fix would be appreciated!
Thanks.

 

[ShaunCorbs]

That looks the correct level identified by the bulge / step out in the cistern would look at the flush valve / siphon

 

[spottydog10]

That looks the correct level identified by the bulge / step out in the cistern would look at the flush valve / siphon

Thanks mate, is a new flush valve easy to fit?

 

[steadyon]

1. There is a diaphragm washer in the syphon mechanism. These go hard / crack over time and need to be replaced. You can cut one out from reasonably thick polythene sheeting, such as a plastic bag. Symptoms are multiple presses of the handle to flush.
2. However, unless you have a certain type of syphon (Dudley Turbo 88), then if its a low level, close coupled WC (cistern mounted directly on the bowl) you need to separate the cistern and bowl. This will almost certainly require a "Doughnut" washer and a close coupling kit to reassemble. The doughnut washer needs to be the right one for the WC.

 

[ShaunCorbs]

Thanks mate, is a new flush valve easy to fit?

can you take a pic of said valve ?

 

[JCplumb]

My guess is old fashioned 'proper' syphon with a split diaphragm.

 

[spottydog10]

can you take a pic of said valve ?

I'm a novice unfortunately, which bit is the valve?

 

[ShaunCorbs]

The bit that flushes

 

[spottydog10]

The bit that flushes

~Is this the bit you mean?

 

[ShaunCorbs]

Yep would replace with a dudley 88 adjustable

 

[Ben-gee]

That is one of the cleanest cisterns I’ve seen!

No crusty old scale like round my way, must make life a lot easier - mind you less work generated.