Gledhill PLU400MB 400L StainlessLite Plus Flexible Buffer Store

The Gledhill PLU400MB is a 400 litre StainlessLite Plus Flexible Buffer Store designed specifically as a vented primary water buffer for renewable heating systems. It increases the overall volume of the heating distribution system to absorb excess heat from heat pumps in low-load conditions, preventing short cycling and ensuring efficient, stable operation.

Ideal for installers working with air source or ground source heat pumps, wood-burning stoves or open-vented boilers, this open-vented duplex stainless steel cylinder is built for primary water only and is not suitable for potable domestic hot water. Its lightweight construction and multiple connection points make it straightforward to integrate into new or replacement heating circuits.

Key Features

• Open vented duplex stainless steel construction
• Provides connections for multiple inputs
• Suitable for air/ground source heat pumps, wood-burning stoves and open-vented boilers
• Designed to directly supply the heating circuit
• Works up to 3.5 bar pressure for primary water
• Lightest cylinder in its class on the market
• ErP rating C with low standing heat loss
• 90° elbow, flexihose and drain valve supplied as standard

Benefits

• ✔ Prevents short cycling of heat pumps for reliable, efficient operation
• ✔ Increases system volume to optimise renewable heating performance
• ✔ Easy integration with multiple heat sources via flexible connections
• ✔ Corrosion-resistant duplex stainless steel for long service life
• ✔ Lightweight design simplifies handling and installation
• ✔ 25-year warranty for peace of mind
• ✔ Not for potable water – primary circuit use only

Technical Specifications

• MPN: PLU400MB
• Capacity: 393 litres
• Height: 2030 mm
• Diameter: 630 mm
• Weight (empty): 51 kg
• Weight (full): 451 kg
• ErP rating: C
• Heat loss: 87 watts
• Maximum operating pressure: 3.5 bar
• Material: Duplex stainless steel
• Type: Vented buffer store (primary water only)

What’s in the Box?

1 x Gledhill PLU400MB StainlessLite Plus Flexible Buffer Store 400L with 90° elbow, flexihose and drain valve.