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Fluidmaster B661AT1/2B Bottom Entry Brass Shank Fill Valve

Fluidmaster

Fluidmaster B661AT1/2B Bottom Entry Brass Shank Fill Valve

Fluidmaster bottom entry fill valve with a brass shank, part number B661AT1/2B, for refilling a toilet cistern.

At a glance

  • Also known as 5410004
Manufacturer part no.
B661AT1/2B
Showing prices

£21.88

£18.23 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 Fluidmaster B661AT1/2B is a bottom entry fill valve with a brass shank, manufactured by Fluidmaster. It is fitted inside a toilet cistern and refills the cistern with water after a flush. The bottom entry design takes the supply connection through the base of the cistern rather than the side wall.

Before you order

  • Confirm the cistern uses a bottom entry inlet, not a side entry inlet.
  • Check the existing valve part number and shank arrangement against B661AT1/2B.
  • Confirm the shank thread matches the cistern inlet before fitting.

Not sure which part?

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