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Fluidmaster Pro bottom entry fill valve, brass shank, PRO45B-1

Fluidmaster

Fluidmaster Pro bottom entry fill valve, brass shank, PRO45B-1

A bottom entry toilet cistern fill valve with a heavy-duty 1/2 inch brass shank, for quiet, corrosion-resistant refilling.

At a glance

  • Also known as 5410002
Manufacturer part no.
PRO45B-1
Showing prices

£20.78

£17.32 ex. VAT · VAT at 20%

Available to order · 7 working days
Available to order · 7 working days
Not certain it's the right part? The technical team verifies fitment before dispatch — no charge, and it stops a second trip.Call the technical teamSend a technical question

Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The PRO45B-1 is a Fluidmaster Pro bottom entry fill valve with a heavy-duty 1/2 inch brass shank, for refilling toilet cisterns from a bottom water connection. The brass shank resists cracking, corrosion and stripping, and is designed to reduce water hammer noise.

Signs this part needs replacing

  • The cistern refills slowly, noisily, or not at all
  • Water keeps running or hissing after the cistern is full
  • Water hammer or banging in the pipework when filling
  • Visible leaking or corrosion around the shank

Before you order

  • Confirm your cistern uses bottom water entry, not side entry
  • Check the connection is 1/2 inch and you need a brass (not plastic) shank
  • Isolate the water supply before removing the old valve
  • Measure the cistern height to set the new valve correctly

Not sure which part?

Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.