Hayward PRO-CHEM-DPHRXG automatic pH + ORP controller

Hayward Pro Chem DPHRXG – pH + ORP dosing controller for pools

The Hayward Pro Chem DPHRXG is an automatic pH + ORP chemical controller with integrated peristaltic pumps, part of Hayward's professional Pro Chem range. It continuously measures the water's pH and ORP values using probes and proportionally doses corrective products, maintaining the chemical balance within the recommended range and optimizing disinfectant performance.

Designed for residential pools and small communal facilities, suitable for indoor and outdoor pools, with a dosing flow rate of approximately 1.5 L/h and a maximum pressure of 1.5 bar. It features a high-visibility display for clear pH readings, easy calibration, and an exclusive-design Santoprene® Hayward tube compatible with the most common acidic products used in pool treatment.

Supplied with the following materials: PVC suction hose 4x6 mm. (2), PE delivery hose 4x6 mm. (2), FPM lip valve (2), PSS3 probe holder (2), connection saddle (5), 1/2 - 3/8" reducing fitting (2), foot filter (2), mounting bracket kit (1), temperature sensor (1), pH probe (1), ORP probe (1), pH 4 buffer solution (1), pH 7 buffer solution (1), 465 mV buffer solution (1), empty bottle (1), EMI coil (1), and peristaltic tube retaining nuts (2).

The Hayward Pro Chem range comprises a complete line of automatic chemical controllers for pools of up to approximately 300–350 m³, with different control configurations: Pro Chem SPH for pH, Pro Chem SRXG for ORP/Redox, Pro Chem DPHRXG for combined pH + ORP control, and the Pro Chem DPHCL and Pro Chem DPHCL2 versions, which add free chlorine measurement and regulation (amperometric or membrane probe) for more demanding installations.

All models share the same design philosophy: compact equipment that is easy to install in the equipment room, with protected electronics (IP55), an installation kit included, and a comprehensive system of configurable alarms (overdosing, lack of liquid, no flow, out-of-range value, etc.). Many models also include a WiFi module and connectivity with Hayward® PoolWatch, allowing you to monitor water status and dosing parameters from anywhere.

Below is the comparison table for the Hayward Pro Chem range, where you can quickly see the differences between the SPH, SRXG, DPHRXG, DPHCL, and DPHCL2 models in terms of control functions, measurement type, performance, and equipment.