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Potterton Non-Return Valve 567540

Potterton

Potterton Non-Return Valve 567540

Potterton non-return valve with G 1 1/4 inch connections for Sirius 2 FS Cascade boiler installations.

Manufacturer part no.
567540
Showing prices

£79.20

£66.00 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 NON RETURN VALVE G 1 1/4 INCH is a Potterton non-return valve supplied as a spare for Potterton Commercial appliances. It sits in the pipework of the boiler system and allows flow in one direction only, preventing backflow and reverse circulation through the circuit. It is listed by the manufacturer under part number 567540.

Signs this part needs replacing

  • Reverse circulation in the system, with heat showing at the wrong part of the circuit
  • The valve fails to hold against backflow when the pump stops
  • Noisy operation or vibration through the pipework around the valve position
  • Boiler lockout or flow-related faults traced to a stuck or seized valve
  • Visible leakage, scale build-up or corrosion at the valve body or connections

Before you order

  • Confirm the connection size required is G 1 1/4 inch
  • Check the appliance model against the fit list above before ordering
  • Inspect the surrounding pipework and connections for damage that may also need attention
  • Verify the existing valve position and flow direction so the replacement is fitted the correct way round

Not sure which part?

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