Gledhill PROIN300 300L 550mm x 1990mm Stainless Pro Indirect Unvented Hot Water Cylinder

The Gledhill PROIN300 is a 300 litre indirect unvented hot water storage cylinder from the Stainless Pro range, manufactured from high-quality duplex stainless steel for corrosion resistance and longevity. It is designed for use with gas or oil boilers in both open-vented and sealed systems and complies fully with Building Regulations Section G3.

Suitable for trade installers and new-build or replacement projects in UK homes, the cylinder provides excellent mains-pressure performance for multiple outlets and comes complete with a G3 kit including valves and tundish.

Key Features

• 300 litre capacity with high-efficiency corrugated primary coil
• Duplex stainless steel construction with 50mm insulation
• Two 3kW immersion heaters and secondary return connection
• Factory-fitted pressure and temperature relief valve (6 bar / 95°C)
• Aligned tappings for straightforward installation
• WRAS and NSF WRC approved with full G3 compliance
• 25-year cylinder warranty (subject to registration)
• Low heat loss and SAP-optimised design

Benefits

• ✔ Delivers strong flow rates for showers and baths without a pump
• ✔ Excellent re-heat performance and energy efficiency
• ✔ Robust build quality for reliable long-term service
• ✔ Complete package reduces installation time and cost
• ✔ Suitable for height-restricted or standard installations
• ✔ Colour-matched components for a professional finish
• ✔ Wide base improves stability during handling and use

Technical Specifications

• MPN: PROIN300
• Capacity: 300 litres
• Diameter: 550 mm
• Height: 1990 mm
• Empty weight: 43 kg
• Hot water draw-off: 22 mm
• Primary flow/return: 22 mm
• Immersion heater: 1¾” BSP 3 kW (x2)
• Pressure reducing valve: 3 bar
• Max working pressure: 5–6 bar

What’s in the Box?

1 x Gledhill Stainless Pro Indirect 300L cylinder complete with cold inlet control set, P&T relief valve, tundish, drain valve, two-port zone valve and immersion heaters.