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Andrews Header - Heat Exchanger (Rev) 7871631

Andrews

Andrews Header - Heat Exchanger (Rev) 7871631

Replacement heat exchanger header for Andrews water heaters, manufacturer part number 7871631.

At a glance

  • Appliance family: Andrews water heaters
  • Also known as 1824793
Manufacturer part no.
7871631
Showing prices

£8,088.60

£6,740.50 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 header for the heat exchanger is a manufacturer-supplied component for Andrews water heaters. It forms the end connection of the heat exchanger assembly, directing water flow through the exchanger body. This is the revised (REV) version of the part, listed under manufacturer part number 7871631.

Signs this part needs replacing

  • Water weeping or dripping from the header joint or its sealing faces
  • Visible corrosion, pitting or scale build-up on the header body
  • Reduced hot water output or unstable temperatures linked to restricted flow through the exchanger
  • Loss of system pressure with no other obvious source of leakage
  • Distortion or cracking around the header connections

Before you order

  • Confirm your appliance model and serial number against the manufacturer's parts list
  • Check that the existing header is the revised (REV) type before ordering
  • Verify the part number 7871631 matches the component being replaced
  • Inspect the mating seals and gaskets, as these are not supplied with the header

Not sure which part?

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