Water Filters

Mechanical filters that remove sand, rust and sediment from the water entering the installation. Honeywell (Resideo) F76S, F74CS and HS10S backwash models, FK06 and FK74CS filter + pressure reducing valve combinations, replacement filter inserts and automatic backwash actuators are listed on this page.

How does a backwash filter work?

As water passes through the stainless steel mesh, the sediment it carries is retained on the outer surface of the mesh. When the backwash valve is opened, water flows through the mesh in the reverse direction and flushes the accumulated sediment into the drain line. The filter insert is thus cleaned without being removed and without shutting off the water supply. In non-backwashable filters, the mesh is removed and replaced periodically.

Mesh size

The standard choice at residential and building water inlets is 100 microns. The catalog offers 20, 50, 100, 200, 300 and 500 micron options: the finer the mesh, the smaller the particles it retains, but the more often the filter needs cleaning. 100 microns is widely used to protect pressure reducing valves and heating appliances.

Automatic backwash

The Z74S and RR11S backwash actuators, fitted to F74CS, FK74CS, F76S and HS10S bodies, carry out backwashing automatically at set intervals; models with a bayonet connection are fitted without tools. Versions with an ISO F03 flange are also available.

Installation and approvals

Filters are installed in horizontal pipework with the filter bowl pointing downward; the drain line is connected to a free outlet. Most of the products are DVGW and WRAS approved for drinking water installations. Technical data (inlet pressure, medium temperature, body material, connection size) are given in the table on each product page.