The short answer: If you can show the existing part, its connections, its measurements and the job it does, we have a much better starting point for finding a suitable replacement. Below is our practical guide for this particular enquiry.
What the fill valve does
The fill valve controls incoming water after a flush and stops the cistern filling at the intended level. Common symptoms of a problem include continuous refilling, slow filling or water not entering the cistern. These symptoms can have other causes too, so look at the mechanism rather than ordering a replacement by symptom alone.
What the flush valve does
The flush mechanism releases water from the cistern when you operate the button, lever or other control. If the flush does not release properly or water continues to pass into the pan, the fault might involve a flush valve, seal, button or connecting part. A leaking cistern is not always a fill-valve issue.
What to photograph
Photograph the complete inside of the cistern without disturbing components unnecessarily. Take close-ups of the inlet connection, existing valve, button or lever mechanism and any make or model markings. Note whether the inlet comes from below or the side, the cistern style and the overall dimensions.
Send the details to BM
Baz & Kaz can help narrow the search when you send pictures and dimensions along with a description of the symptom. Identify the make where possible and ask whether seals or replacement components may be relevant. Isolate the water appropriately before maintenance, and seek a plumber if you are unsure.
Need help buying the part in Leicester?
Visit Toilet cistern spares in Leicester, telephone 0116 269 6677, or send your pictures to BM on WhatsApp. The team can check stock and compatibility details before confirming your order.
Our approach: You do not have to know the name of every weird and wonderful fitting. Send the photo; we will help you work out what to ask for.