Backflow preventer and Autofill Combination


Backflow preventer and Autofill Combination allows to fill hot water and glycol radiant floor PEX tube circuit and maintain the pressure of the system at a set value, automatically filling up with water as required.

Technical sheet User manual

Backflow preventer and Autofill Combination


Part #: 573002A SKU: CF-573002A Categories: ,


The automatic filling valve is a device consisting of a pressure reducing valve with compensating seat, visual system pressure setting indicator, an inlet filter, anti-scale internal parts, a shut-off valve (round knob on bottom) and a check valve.

It is installed on the water inlet piping in sealed heating systems like radiant floor hydronic system, and its main function is to maintain the pressure of the system at a set value, automatically filling up with water as required.

The valve is pre-adjustable, meaning it can be set to the desired pressure value before the system charging phase.

After installation, during the filling or topping-off phase, the water feed will stop when the set pressure is reached. This valve fills 50% faster than other valves. There are no levers to flip or valve to close.

Pre-assembled with the 573 series backfl ow preventer, the AutoFill™ Combo features an atmospheric vent which is designed to protect drinking water systems from return flow, caused by back-siphoning or back pressure, of contaminated fluids. The 573 series has been specifically certified to standards CSA B64.3 and ASSE 1012.


Weight1 kg
Dimensions30 × 30 × 30 cm

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