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Johnson & Starley Temperature and Pressure Relief Valve S00707

Johnson & Starley

Johnson & Starley Temperature and Pressure Relief Valve S00707

Temperature and pressure relief valve, part S00707, for Johnson & Starley State SBE and SBT boilers.

At a glance

  • Also known as 1691500
Manufacturer part no.
S00707
Showing prices

£418.70

£348.92 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 Johnson & Starley temperature and pressure relief valve is a safety component fitted to State SBE and SBT boilers. It opens to discharge water if system temperature or pressure exceeds safe limits, protecting the appliance and the heating circuit. It is supplied under part number S00707.

Signs this part needs replacing

  • Water weeping or discharging continuously from the valve outlet
  • The valve fails to seat fully after it has operated
  • System pressure rises beyond normal working range without the valve relieving
  • Scale, corrosion or debris visible around the valve body or seat
  • Boiler locking out or discharging repeatedly during heat-up

Before you order

  • Confirm the appliance model and serial number against the manufacturer's parts list
  • Check the existing valve's part number and pressure rating before ordering
  • Verify the expansion vessel and system charge pressure are correct, as a failed vessel can mimic valve failure
  • Isolate the appliance, drain down and depressurise before fitting

Not sure which part?

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