Gledhill EnviroFoam Copper Direct Vented Hot Water Cylinder – 144 Litre, 1050 x 450mm

The Gledhill EnviroFoam Copper Direct Vented Cylinder is a high-quality, traditionally constructed hot water storage solution designed for open-vented (conventional) domestic heating systems fed by a header tank in the loft. Manufactured from premium-grade copper with 35mm HCFC-free foam insulation, this cylinder delivers reliable hot water storage with low standing heat loss and full Part L1b compliance.

What sets the Gledhill EnviroFoam Copper apart is its bespoke manufacturing capability. Produced to order through Gledhill’s nationwide manufacturing centres, key components including tapping heights can be custom-specified to suit any installation — making it the go-to choice for replacement jobs where non-standard configurations are required. With next day delivery available, it’s equally suited to planned installations and urgent site requirements.

Ideal For

• Direct replacement in open-vented (gravity-fed) domestic hot water systems
• Properties with a cold water header tank in the loft
• Electric immersion heater-only heating setups
• Installations requiring bespoke tapping heights or non-standard configurations
• Urgent replacement jobs requiring next day delivery to site

Why Choose the Gledhill EnviroFoam Copper Direct Vented Cylinder?

• Bespoke Tapping Heights Available – Manufactured to order with custom tapping positions to suit any existing pipework configuration, saving time and cost on site.
• Premium Copper Construction – Naturally corrosion-resistant and time-proven in UK domestic hot water systems, with excellent longevity in standard water conditions.
• 35mm HCFC-Free Insulation – Environmentally responsible foam insulation minimises standby heat loss, reducing energy consumption and running costs.
• Low Standing Heat Loss – Engineered to retain heat efficiently between heating cycles, improving overall system performance.
• Part L1b Compliant – Meets current Building Regulations Part L1b requirements for energy efficiency in existing dwellings.
• Optional Compression Fittings – 22mm compression fittings and secondary return available as optional extras for added installation flexibility.
• Optional Immersion Heater Boss – Immersion heater not supplied as standard but can be specified; boss provision available to suit electric backup heating.
• Next Day Delivery Available – Manufactured through Gledhill’s nationwide centres with next day delivery to site, minimising downtime on urgent replacement jobs.
• 10-Year Manufacturer’s Warranty – Backed by Gledhill’s decade-long guarantee for complete peace of mind.

Technical Specifications

• Brand: Gledhill
• Range: EnviroFoam Copper
• Model Number: BDIR21
• Supplier Part Number: BDIR21
• Product Type: Direct Vented Hot Water Cylinder
• Capacity: 144 Litres
• Height: 1050mm
• Width: 450mm
• Depth: 450mm
• Material: Copper
• Colour: Green
• Insulation: 35mm HCFC-Free Foam
• Fuel Type: Electric (immersion heater)
• Number of Immersion Heaters: Optional – not supplied as standard
• Connection Fittings: Optional compression fittings available
• Secondary Return: Optional
• Expansion Vessel: Not applicable / not included
• Usage: Open-vented (conventional) domestic cylinder fed by header tank in loft; direct vented
• Compliance: Part L1b
• Warranty: 10 Years
• Delivery: Next day delivery available (manufactured to order)

What’s Included

• 1 x Gledhill EnviroFoam Copper Direct Vented Cylinder – 144L, 1050 x 450mm
• Manufacturer’s installation and user documentation
• 10-year warranty documentation
• Note: Compression fittings, secondary return, and immersion heater are optional extras – please contact us to specify at point of order.

Installation & Compliance Notes

This cylinder is designed for installation in open-vented direct heating systems and must be installed by a qualified plumber or heating engineer in accordance with Building Regulations Part L1b, the Water Supply (Water Fittings) Regulations 1999, and the manufacturer’s installation guidelines.

The cylinder must be installed with an appropriate cold feed and vent pipe arrangement from the header tank. Where an immersion heater is to be fitted, all electrical work must be carried out by a qualified electrician in accordance with BS 7671 (IET Wiring Regulations) and Part P of the Building Regulations. Always commission and pressure-test the system prior to handover.

Tapping heights and optional fittings can be bespoke specified at point of order — please contact our trade team for details.

For trade pricing, bulk orders, or technical support, please contact our team directly.