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Hamworthy 3/4 Inch Non Return (Check) Valve 531911003

Hamworthy

Hamworthy 3/4 Inch Non Return (Check) Valve 531911003

Hamworthy 3/4 inch non return (check) valve, part number 531911003, a brass swing check valve for compatible Hamworthy boiler and water heater applications.

At a glance

  • Also known as 8911987
Manufacturer part no.
531911003
Showing prices

£75.41

£62.84 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 Hamworthy 531911003 is a 3/4 inch non return (check) valve for Hamworthy boiler and water heater applications. It is a brass swing check valve that allows flow in one direction and prevents reverse flow through the connected circuit. The valve is listed for use with compatible Hamworthy appliances and forms part of the manufacturer's spare parts range.

Signs this part needs replacing

  • Reverse flow or backflow occurs where the valve should prevent it.
  • The valve does not hold against return flow in the system.
  • Debris, scale or corrosion prevents the internal check mechanism from seating correctly.
  • Unexpected pressure changes or crossflow between connected circuits.
  • Visible damage or leakage around the valve body or connections.

Before you order

  • Confirm the part number 531911003 matches the valve being replaced.
  • Check the connection size is 3/4 inch.
  • Confirm the valve type is a non return (check) valve.
  • Check the appliance model against the Fits list above.

Not sure which part?

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