Caleffi 3/6 Bar 22mm O-Ring Type Multibloc 535001CST

The Caleffi 535001CST is a compact, all-in-one multibloc valve engineered for unvented hot water cylinder installations.

Combining a pressure reducing valve (PRV), pressure relief valve, and check valve in a single 22mm fitting, it regulates incoming mains pressure to safe operating levels while providing essential backflow protection.

Key Features

• Integrated 3-bar pressure reduction – maintains consistent, controlled inlet pressure to the cylinder
• 6-bar pressure relief protection – automatic overpressure discharge for system safety
• Built-in check valve – prevents backflow contamination of mains supply
• O-ring sealed design – reliable, serviceable connections with reduced risk of weeping joints
• 22mm compression fittings – straightforward installation on standard UK copper pipework

Specification

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