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Potterton Myson PowerExtra MPE322 three port mid-position valve, 22mm

Potterton

Potterton Myson PowerExtra MPE322 three port mid-position valve, 22mm

A Potterton Myson PowerExtra 22mm three-port mid-position motorised valve that diverts hot water between the heating and hot water circuits.

At a glance

  • Also known as 1126066
Manufacturer part no.
MPE322
Showing prices

£204.48

£170.40 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 MPE322 is a Potterton Myson PowerExtra three-port mid-position motorised valve, 22mm, used on Y-plan and similar heating systems to direct hot water to the central heating circuit, the hot water cylinder, or both. It uses a Class F insulated 6W motor for extended motor life and enough torque to open reliably after long periods shut down.

Signs this part needs replacing

  • Heating or hot water runs when it shouldn't, or won't run at all
  • Valve motor hums or stalls without moving the spindle
  • Valve stuck mid-travel, giving lukewarm heating and hot water together
  • Visible leaking from the valve body or actuator failing to seat

Before you order

  • Match the part number printed on the existing valve or actuator before ordering
  • Isolate electrical supply and drain down the system before removal
  • Check whether only the actuator (ACT322) needs replacing rather than the full valve body

Not sure which part?

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