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Alpha Isolation Valve 6.5629170A

Alpha

Alpha Isolation Valve 6.5629170A

Alpha 6.5629170A 3/4 CH return isolation valve with seal kit for Alpha 240 and 280 series boilers up to serial number A73900001.

At a glance

  • Also known as 1251192
Manufacturer part no.
6.5629170A
Showing prices

£116.51

£97.09 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

The Alpha 6.5629170A is a central heating return isolation valve with seal kit, sized 3/4, used on Alpha 240 and 280 series gas boilers. It isolates the CH return connection so the appliance can be drained and serviced safely. This version is specified for appliances up to serial number A73900001.

Signs this part needs replacing

  • Water weeping from the valve body, spindle or gland
  • The valve spindle is seized and will not turn
  • The valve will not shut off fully, so the boiler cannot be isolated
  • Corrosion or scale build-up around the valve and connections
  • A damaged or perished seal causing a persistent drip at the joint

Before you order

  • Confirm the appliance serial number is up to A73900001, as this valve is specified for that range
  • Check the boiler model and GC number against the fitment list
  • Verify the connection size is 3/4 before fitting
  • Check whether the complete valve is required or the seal kit alone

Not sure which part?

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