Johnson & Starley
Johnson & Starley temperature and pressure relief valve S00879
Genuine Johnson & Starley temperature and pressure relief valve (S00879) for CE-marked State warm air heaters, protecting the appliance from excess temperature and pressure.
At a glance
- Part type: pressure relief valve (PRV)
- Also known as 1691346
£302.40
£252.00 ex. VAT · VAT at 20%
Same-day dispatch
Ordered by 4pm Mon–Fri, 10:30am Sat.
30-day returns
Unused, in original packaging.
What it is
A temperature and pressure relief valve (PRV) for Johnson & Starley State warm air heaters that carry the CE mark. It opens automatically if the appliance's water temperature or pressure exceeds a safe limit, discharging to protect the heat exchanger from damage.
Signs this part needs replacing
- Valve weeping or dripping continuously from the discharge outlet
- Valve fails to open under test, or system pressure keeps climbing
- Visible corrosion, scale build-up or a seized lever
- Appliance lockout linked to overheat or over-pressure faults
Before you order
- Confirm your heater carries the CE mark before fitting this valve
- Match the part number on your existing valve against S00879
- Isolate and depressurise the system before removal, and drain down as needed
Compliance
| Alternative numbers | 1691346 |
|---|
No fitment data held for this part.
Documents & drawings
Everything we hold for this part. Where a document exists but we don't hold it, the technical team will source it from the manufacturer — usually the same working day.
No documents held for this part. The technical team will source them from the manufacturer — usually the same working day.
No technical questions yet for this part.
Not sure which part?
Search by part number, product name or brand — our technical team confirms fitment before anything is dispatched.