Cistern Water Suppy Issue

[Plumb37]

Hi,

I’ve just replaced my WC cistern fill valve (bottom feed) with a brand new one from Toolstation as the cistern wasn’t filling up. The water feed to the cistern has an isolating valve which seems to be working fine.

After fitting the new valve the cistern filled up and flushed 4/5 times as it should do but then just stopped filling up reverting back to the original problem.

Before fitting the new fill valve I changed the washer in the original one and the same thing happened.

This makes me think there must be an issue with the water supply coming in but I have never seen a cistern fill correctly 4/5 times and then stop filling.

Any advice would be really appreciated.
Gary

 

[rpm]

Check the float isn`t getting snagged on anything in the cistern.

 

[Plumb37]

Thanks for the reply.

The float is ok and there is plenty of clearance. I had the same issue with the original fill valve & float which is why I changed it. I thought this may have solved it.
What’s confusing is it all works as it should do for 5 flushes and then the water pressure seems to drop and it trickles.

 

[rpm]

Guess you need to trace back to where the water is supplied from.

 

[townfanjon]

Who the manufacturer of the valve ?

 

[Rob Foster]

Hi,

I’ve just replaced my WC cistern fill valve (bottom feed) with a brand new one from Toolstation as the cistern wasn’t filling up. The water feed to the cistern has an isolating valve which seems to be working fine.

After fitting the new valve the cistern filled up and flushed 4/5 times as it should do but then just stopped filling up reverting back to the original problem.

Before fitting the new fill valve I changed the washer in the original one and the same thing happened.

This makes me think there must be an issue with the water supply coming in but I have never seen a cistern fill correctly 4/5 times and then stop filling.

Any advice would be really appreciated.
Gary

I wonder if this cistern is tank or mains fed > if its mains fed then it should refill grand style however if its a tanky one then this might be the answer.send us some pics hey

 

[DAVE01]

Hi,

I’ve just replaced my WC cistern fill valve (bottom feed) with a brand new one from Toolstation as the cistern wasn’t filling up. The water feed to the cistern has an isolating valve which seems to be working fine.

After fitting the new valve the cistern filled up and flushed 4/5 times as it should do but then just stopped filling up reverting back to the original problem.

Before fitting the new fill valve I changed the washer in the original one and the same thing happened.

This makes me think there must be an issue with the water supply coming in but I have never seen a cistern fill correctly 4/5 times and then stop filling.

Any advice would be really appreciated.
Gary

Best thing to do is put a penny valve on cold supply to cistern close penny valve turn back on to see if there is a issue with water supply If cold to cistern and its a standard ball cock it should have a low pressure orfice if its comeing from cold mains should be high pressure orfice use a torbeck valve it comes in a kit with high and low pressure and medium pressure orfice

 

[Best]

Best thing to do is put a penny valve on cold supply to cistern close penny valve turn back on to see if there is a issue with water supply If cold to cistern and its a standard ball cock it should have a low pressure orfice if its comeing from cold mains should be high pressure orfice use a torbeck valve it comes in a kit with high and low pressure and medium pressure orfice

Most plumbers now don’t use the Torbeck valves as they started to give a lot of trouble when they were redesigned.
Fluidmaster Pro45b (brass tail) is one of the preferred valves

 

[Plumb37]

Thank you for the responses.

This is the valve I fitted:

 

[rpm]

Nice valve, I'm happy to fit them