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Alpha Seal Kit Water Complete 3.013386

Alpha

Alpha Seal Kit Water Complete 3.013386

Alpha Water Complete Seal Kit 3.013386 for the diverter valve section of Alpha C23, C27 and CB series combi boilers.

At a glance

  • Part type: Gaskets, seals and washers
  • Also known as 1250611
Manufacturer part no.
3.013386
Showing prices

£37.96

£31.63 ex. VAT · VAT at 20%

In stock
Cut-off passed — dispatches next working day
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Same-day dispatch

Ordered by 4pm Mon–Fri, 10:30am Sat.

30-day returns

Unused, in original packaging.

What it is

The Alpha Water Complete Seal Kit is a service kit of gaskets, O-rings, seals and washers for the water section of Alpha combi boilers. It is built around the diverter valve assembly, the mechanism that switches the boiler between central heating and domestic hot water production. Replacing the seals in this section restores a sound seal on the water-carrying components and is a common step when the diverter valve area is stripped down for repair.

Signs this part needs replacing

  • Water weeping or dripping from the diverter valve area of the boiler
  • Traces of scale or corrosion around the water section joints
  • Loss of domestic hot water while central heating continues to run, or the reverse
  • Boiler losing pressure with no visible leak elsewhere on the system
  • Seals found flattened, hardened or split when the diverter valve is opened up

Before you order

  • Check the GC number on the appliance data badge against the compatibility list to confirm the kit suits your model
  • Confirm the part number on the existing component or in the boiler manual matches 3.013386
  • Note the alternative numbers 1250611 and 013386, which may appear on older documentation or packaging

Not sure which part?

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