Gledhill PLUHP400 400L StainlessLite Plus Heat Pump Unvented Cylinder

The Gledhill PLUHP400 is a 400L unvented stainless steel hot water cylinder specifically designed for use with air source or ground source heat pumps, providing efficient mains-pressure domestic hot water.

Ideal for trade installers and larger domestic properties, it utilises a high-efficiency multi-pass corrugated stainless steel coil to maximise heat transfer from lower-temperature heat pump sources. Built with high-specification duplex stainless steel and high-density HCFC-free Envirofoam insulation for durability and energy efficiency.

Key Features

• Designed specifically for heat pump applications
• High-efficiency corrugated coil maximises heat transfer
• 3kW Incoloy immersion heater for emergency back-up
• Secondary return connection included
• 25-year manufacturer warranty
• High density HCFC-free Envirofoam insulation
• Duplex stainless steel construction
• ERP rating C
• Multi-pass coil for higher flow rates
• 90° elbow and drain valve supplied

Benefits

• ✔ Optimised for lower temperature heat pump operation
• ✔ Provides reliable mains pressure hot water
• ✔ Reduces running costs with efficient heat exchange
• ✔ Long-term peace of mind with extended warranty
• ✔ Suitable for new installs or heat pump retrofits
• ✔ Minimal heat loss through premium insulation
• ✔ Easy integration with standard heat pump setups
• ✔ Includes essential safety and control components
• ✔ Trade-grade build quality for professional installations

Technical Specifications

• MPN: PLUHP400
• Capacity: 400L
• Height: 2030mm
• Diameter: 630mm
• Weight (empty): 62kg
• Material: Duplex stainless steel
• Coil surface area: 4m²
• Immersion heater: 3kW Incoloy
• ERP rating: C
• Secondary return: Yes

What’s in the Box?

1 x Gledhill StainlessLite Plus Heat Pump Unvented Cylinder PLUHP400 with 3kW immersion heater, cold water inlet controls, pressure and temperature relief valve, tundish, drain elbow and zone valve.