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Alpha seal kit 735 water complete for Alpha 240/280 6.1000735

Alpha

Alpha seal kit 735 water complete for Alpha 240/280 6.1000735

Genuine Alpha "water complete" seal kit for the Alpha 240 and 280 boilers, part number 6.1000735.

At a glance

  • Also known as 1250818
  • Fitting should be carried out or checked by a Gas Safe registered engineer
Manufacturer part no.
6.1000735
GC number
343-708
Showing prices

£59.95

£49.96 ex. VAT · VAT at 20%

Available to order · 3 working days
Available to order · 3 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

This is the "water complete" seal kit for the water assembly on the Alpha 240 and 280 boilers, used to reseal the hydraulic block when it is removed for servicing or replacement. It is a genuine Alpha part, number 6.1000735.

Signs this part needs replacing

  • Water leaking from the hydraulic block or its joints
  • Visible perishing, cracking or hardening of the old seals
  • Seals damaged during removal of the water assembly for servicing
  • A drop in system pressure with no obvious external cause

Before you order

  • Match this part number against the seal kit fitted to your boiler
  • Isolate and drain the system before starting work
  • Fitting should be carried out or checked by a Gas Safe registered engineer

Not sure which part?

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