Water fills cistern very slowly

[jwills64]

The toilet in my bathroom fills very slowly and I don't know what to do to make it fill quicker. I'm posting a picture so hopefully someone can tell me what I need to do.

 

[oldbuffer]

1. Is this something new, or has it always filled slowly? All options below require the water to the WC cistern to be shut off. Then:

2. If its a new problem, I'd suggest your first step is to change the diaphragm washer in the inlet valve. I'm afraid I can't tell from the photograph what type of inlet valve it is.

3. If it has been like this since installation, then:
3a. If your water supply to the WC cistern is low pressure (cold water storage cistern in loft), they may have left the pressure reducer in the valve when fitting it. Usually in the bottom of the stem of the inlet valve. Remove it.
3b. If the water supply is high pressure (mains), as 2. above.

4. If all else fails, change the inlet valve. Fluidmaster with brass shank is generally good if you have the room for it.

 

[jwills64]

Ok thanks, I'll take closer look and see what can be deduced

 

[just pumps]

Did you clean it all before taking the photo?

 

[jwills64]

I didn't. It's five years old, maybe that's why.

 

[CBW]

Siamp washer required - a 2 minute job usually. They’re prone to failure, they get a split or hole in the washer.

https://shop.siamp.co.uk/diaphragm-washer-5

 

[jwills64]

Thanks for all the replies. I decided to go with The Novice's advice first as that seemed easy. I googled siamp washer, saw a link to screwfix and a YouTube video showing how to fit them. Bought the washer, watched the video, followed the instructions and now the cistern fills in about 40 seconds instead of about 10 minutes

I'm a very pleased newbie on this forum