Under-boiler polyphosphate dispenser Caleffi XP (5459 series)

The polyphosphate dispenser limits limescale formation in the domestic water system and in the devices connected to it.

It is installed on the domestic cold water pipe supplying the instantaneous boiler. It helps to maintain the original heat exchange performance levels of the generator and heat exchanger in the DHW production circuit over time. It also combats corrosion and progressively cleans up systems which are already experiencing some limescale build-up, in addition to susceptible parts.

The dosage of polyphosphates in the water is proportional to the amount of cold water passing through the device.

Materials

Body: brass EN 12165 CW617N, chrome plated
Fittings: brass EN 12165 CW617N, chrome plated
Hydraulic seals: EPDM
Ball: ottone EN 12165 CW617N
Ball valve lever: PA66G30
Crystals: polyphosphate salts for potable water conforming to standard UNI EN 1208
Salt container: PA12
Dark-coloured pellets: EPDM

Connections

- boiler side: 1/2” M (ISO 228-1)
- cold water side 1/2” M (ISO 228-1)
- fitting (supplied): 1/2” F - 1/2” F