Caleffi 309473 CST Series 309 Relief Valve provides dual protection at 90°C temperature and 7 Bar pressure with 1/2″ connection—WRAS approved for unvented storage systems.
Caleffi A311501CST Pressure Relief Valve with 6 Bar rating and loose nut fitting—a direct replacement for MK2 Multiblocs in unvented hot water systems.
Altecnic Caleffi F0000412 Pressure Relief Valve features a 6 Bar rating and circlip connection—designed as a direct replacement for MK3 Caleffi multiblocs in unvented hot water systems.
Caleffi F0001021 Multibloc Valve offers 3 Bar pressure reduction, 6 Bar safety relief, check valve, and filter in a durable 22mm copper x copper loose nut assembly for unvented systems.
Caleffi F0001223 Circlip Multibloc Valve features an all-in-one PRV, SRV, check valve, and filter, with 22mm copper connections—ideal for unvented cylinder safety and performance.
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Pegler Yorkshire Terrier 631907 TRV Thermostatic Radiator Valve 15mm Angled Chrome 7C–28C EN215 Approved