22mm DZR Brass Double Check Valve

This 22mm DZR brass double check valve features two check inserts and an integral test port, providing enhanced backflow prevention for potable water, heating, and booster pump systems. WRAS approved and suitable for universal installation positions.

• Size: 22mm compression x compression

• Body: Brass EN 12165 CW602N (DZR)

• Nut: Brass EN 12165 CW617N

• Olive: Annealed copper

• Plug: Brass EN 12164 CW602N (DZR)

• Insert: POM + NBR

• Locking ring: Phosphorous bronze

• Working temperature range: 0–95°C (peaks to 110°C)

• Opening pressure: 0.05 bar

• Maximum working pressure: 16 bar

• Suitable fluids: Potable water, thermal systems, glycol solutions (max 30%)

• Connections: Compression ends EN 1254-2, threaded ISO 228-1

• Approvals: WRAS