Gledhill PRODR300 300L 550mm Direct Unvented Hot Water Cylinder

The Gledhill PRODR300 is a 300-litre direct unvented hot water cylinder from the Stainless Pro range, purpose-built for electrically heated mains-pressure systems in UK properties.

Manufactured from premium duplex stainless steel with 50 mm insulation, it suits larger households needing high volumes of hot water, new installs or replacements, and both trade and competent DIY users seeking WRAS-approved reliability.

Supplied as a complete G3 package with factory-fitted safety devices for straightforward installation.

Key Features

• 300 L nominal capacity (287 L actual)
• Two 3 kW immersion heaters (1¾” BSP)
• 550 mm diameter, 1990 mm height
• 41 kg empty weight
• 22 mm connections throughout
• Factory-fitted 95 °C / 6 bar T&P relief valve
• 50 mm HCFC-free foam insulation
• Secondary return connection (22 mm)
• ErP rating C, 86 W heat loss
• WRAS and NSF WRC approved

Benefits

• ✔ Delivers high-volume mains-pressure hot water for 3+ bathrooms
• ✔ Optimised for off-peak tariffs with dual immersions
• ✔ Excellent heat retention and low running costs
• ✔ Corrosion-resistant duplex stainless steel construction
• ✔ Quick and simple installation with aligned tappings
• ✔ Full Building Regulations G3 compliance out of the box
• ✔ 25-year cylinder warranty for peace of mind
• ✔ Environmentally responsible insulation (ODP 0, GWP 2)
• ✔ Wide base for stability and colour-matched components

Technical Specifications

• MPN: PRODR300
• Capacity: 300 litres (nominal)
• Diameter: 550 mm
• Height: 1990 mm
• Weight (empty): 41 kg
• Immersion heaters: 2 × 3 kW (1¾” BSP)
• Operating pressure: 6 bar
• ErP rating: C
• Heat loss: 86 W
• Material: Duplex stainless steel

What’s in the Box?

1 × Gledhill PRODR300 Stainless Pro Direct 300 L unvented cylinder complete with factory-fitted safety and control devices, G3 kit and installation literature.