The Brass 3 Bar PRV (pressure‑relief valve) is a reliable safety component designed especially for Ravenheat CSI‑85 and CSI‑85T combi boilers. Made from solid brass, this valve automatically vents excess pressure once the system reaches 3 bar, protecting the heat exchanger, pump and pipework from over‑pressure damage. Its 1/2″ BSP male‑female connection fits seamlessly into existing installations, offering a direct replacement for part 5015010.
Key benefits
– Automatic pressure release at the safe 3 bar limit
– Prevents boiler bursts and safeguards surrounding components
– Durable brass construction ensures long‑term performance and corrosion resistance
– Maintains optimal boiler efficiency, helping to extend the unit’s service life
Dimensions: 72 mm length × 40 mm width
Maximum working pressure: 3 bar
Compatible with the following Ravenheat models:
– CSI 85 COMBI (LPG & NG)
– CSI 85T COMBI (LPG & NG)
– CSI COMBI (LPG & NG)
– RSF 820/20T COMBI (NG)
This premium‑grade PRV offers a cost‑effective upgrade for anyone needing a dependable safety valve that meets OEM specifications without being an original part. Install it quickly to keep your boiler running safely and efficiently.





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