Gledhill PLUHP400S 400L StainlessLite Plus Heat Pump Solar Unvented Cylinder

The Gledhill PLUHP400S is a 400-litre unvented stainless steel hot water cylinder from the StainlessLite Plus range, purpose-built for heat pump and solar thermal systems. It provides efficient mains-pressure domestic hot water using a high-efficiency corrugated heat pump coil and dedicated solar volume.

Suitable for larger domestic properties or light commercial installations, this cylinder suits both new-build and replacement projects where low-temperature heat sources are used. Built from high-grade duplex stainless steel with high-density insulation, it offers long-term durability and low heat loss.

Key Features

• Designed for air source or ground source heat pumps plus solar thermal panels
• High-efficiency multi-pass corrugated stainless steel heat pump coil
• 3kW Incoloy immersion heater for emergency back-up
• 90° elbow and drain valve supplied as standard
• Secondary return connection
• 25-year manufacturer warranty
• High-density HCFC-free insulation
• ErP rating C

Benefits

• ✔ Optimised for lower-temperature heat pump operation
• ✔ Maximises heat transfer while minimising pressure loss
• ✔ Provides reliable hot water even when heat pump output is limited
• ✔ Reduces running costs compared with standard cylinders
• ✔ Includes dedicated solar volume for renewable input
• ✔ Quick and straightforward installation with supplied fittings
• ✔ Long-term corrosion resistance and low maintenance
• ✔ Suitable for larger households requiring high hot-water demand

Technical Specifications

• MPN: PLUHP400S
• Capacity: 393 litres
• Height: 2030 mm
• Diameter: 630 mm
• Weight (empty): 61 kg
• Weight (full): 461 kg
• Heat loss: 87 W
• Heat pump coil surface area: 2.91 m²
• Dedicated solar volume: 130 litres
• Number of immersions: 1
• Secondary return: Yes

What’s in the Box?

1 x Gledhill StainlessLite Plus Heat Pump Solar 400L Unvented Cylinder (PLUHP400S) including 3kW immersion heater, cold water inlet controls, pressure & temperature relief valve, 90° elbow and drain valve.