Our 18kW Industrial Hard Water Immersion Heater is specifically designed for demanding applications where limescale and mineral deposits can significantly reduce the lifespan of standard heating elements. Manufactured in the UK using premium-grade components, this heater features Incoloy 800 sheathed elements, offering excellent resistance to corrosion, scale formation, and high operating temperatures.

The heater’s low watt density of just 8.7W/cm² (56W/in²) helps reduce surface temperatures, minimising limescale build-up and improving heat transfer efficiency. This combination makes it an ideal choice for areas with hard water, helping to extend service life, reduce maintenance, and improve reliability.

Each unit is precision assembled by skilled technicians using advanced CNC manufacturing techniques and is built with high-quality resistance wire, compacted magnesium oxide insulation, and robust electrical connections to deliver dependable performance in industrial environments.

Specifications

Power: 18kW
Immersed Length: 830mm (33″)
Thread: 2¼” BSP screw plug
Voltage: 415V, 3-phase, DELTA
Inactive (Cold) End: 150mm (6″)
Watt Density: 8.7W/cm² (56W/in²) – ideal for reducing scale build-up in hard water
Terminal Enclosure: IP67-rated alloy enclosure (120mm diameter × 105mm height)
Heating Elements: Three 2kW, 8mm diameter Incoloy 800 elements in 3 phase DELTA configuration (trebles power output, no neutral)
Construction: Elements brazed into the screw plug for maximum strength and durability
Thermowell: TIG-welded Incoloy 800 thermowell suitable for any of our 11″ thermostats

Wherever you are in the world, and whether you’re heating hard water in commercial or industrial systems.

Our Hard Water Immersion Heater 18kW is engineered to maximise reliability, minimise scale-related failures.

Thus delivering a longer operational life than conventional immersion heaters.

And at a competitive price too.

Great things are on the horizon