Double Check Valve Brass – 440

From £20.40 £24.48 inc. vat


Double Check Valves with DZR brass valve bodies and compression or female BSP connections. Sprung-loaded Cartridges with resilient seats provide positive closure, no water hammer and low opening pressure. Hot-stamped DZR compression nuts with fine thread minimises the torque required to make the joint.


Backflow prevention for fluids in categories 1 – 3 (refer to Scheduled 1 of Water Regulations July 1999) Supply to flats and apartments – refer to Branch Valve Domestic Washbasins, Baths and Showers – refer to ED235 Domestic Clothes and Dishwashing machines (houses only) CWF Primary and Heating circuits (houses only with removable quick fill loop) – see Filling Valve with CA device Hose Union taps (houses only – check valves in taps illegal)

Product Specification
  • Material DZR Brass
  • Powered No
  • Test Points Non-Verifiable
Specification Clause

Every Double Check Valve assembly shall have a DZR brass body with compression fittings to BS864-2 – model ED440 – as distributed by Arrow Valves Ltd – Tel 01442 823123 The pressure drop across the assembly at 1.5 m/s pipe velocity shall be less than 0.35 bar. The body and compression connections shall be DZR brass.

Data Sheets


ed440datasheet-1.pdf (446.97 KB)


Installation Guide

ed_ebcheckvalveso_mmanual_33.pdf (125.26 KB)