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Remeha Avanta 3-Way Diverter Valve Inner Assembly 720557601

Remeha

Remeha Avanta 3-Way Diverter Valve Inner Assembly 720557601

Genuine Remeha 3-way diverter valve inner assembly that directs hot water between heating and domestic hot water, fitted to Avanta Plus Combi 28C, 35C and 39C boilers.

At a glance

  • Also known as 2200312
Manufacturer part no.
S100217/DD
Showing prices

£126.72

£105.60 ex. VAT · VAT at 20%

Available to order · 1 working day
Available to order · 1 working day
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 720557601 (also listed as S100217) is a genuine Remeha 3-way diverter valve inner assembly, also known as the hydraulic outlet assembly or motorised valve cartridge. It directs the flow of hot water inside the boiler to either the central heating circuit (radiators) or the domestic hot water circuit (taps).

Signs this part needs replacing

  • No hot water at taps while the boiler continues to heat radiators, or vice versa
  • Cross-flow between the heating and hot water circuits
  • Water hammer or a ticking/grinding noise from the valve
  • Valve motor runs but the boiler doesn't switch modes correctly

Before you order

  • Confirm the part number printed on the existing assembly matches 720557601 or S100217
  • Isolate power and shut off the water supply before opening the valve body
  • Inspect the valve body and seals for wear at the same time

Not sure which part?

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