Caleffi Pressure Zone Backflow Preventer, Series: 574, 1/2 in Nominal, Press, 150 psi, Handle Operator, 3.4 Flow Coefficient, DZR Brass Body, Lead-Free, 150 deg F, 12-3/8 in L x 6-1/4 in H

• Testable reduced pressure zone backflow preventer
• DZR low-lead brass body
• Compliance with the following codes: IPC, IRC and UPC for use in accordance with the US and Canadian plumbing codes
• DZR low-lead brass, EN 12165 CW724R cover, PSU-POM check valve, stainless steel springs, peroxide-cured EPDM diaphragms and seals, steel handle and PTFE seat ring and packing gland, brass gland nut

• Instruction/Installation Manual https://assets.unilogcorp.com/267/ITEM/DOC/Caleffi_574004A_Manual.pdf