Gledhill PROIN150 150L 550mm Diameter Pro Indirect Unvented Hot Water Cylinder

The Gledhill PROIN150 is a 150-litre indirect unvented hot water cylinder from the Stainless Pro range, manufactured in premium duplex stainless steel for long-term durability and corrosion resistance.

Ideal for medium-sized households and new-build or replacement installations, it provides high-performance mains-pressure hot water when paired with a conventional boiler while meeting Section G3 Building Regulations requirements.

Supplied as a complete package with low heat loss insulation, aligned tappings for easier installation and a 25-year warranty, it suits both trade professionals and competent DIYers seeking a quality, SAP-optimised solution.

Key Features

• High-efficiency corrugated primary coil for rapid re-heat
• 50 mm insulation for minimal standing heat loss
• Aligned tapping positions and wide base for stable, straightforward installation
• Colour-matched components and flat-top design
• Full NSF WRC and WRAS approvals with G3 package included
• Secondary return connection on this model
• Two 3 kW immersion heater connections (1¾” BSP)
• Pressure & temperature relief valve factory-set to 95 °C / 6 bar
• 25-year manufacturer warranty

Benefits

• ✔ Delivers strong mains-pressure hot water for multiple outlets
• ✔ Excellent re-heat performance and low running costs
• ✔ Compact footprint suits most airing cupboards
• ✔ Pre-approved components simplify Building Regulations compliance
• ✔ Robust duplex stainless steel construction for decades of service
• ✔ Easy pipework connections reduce installation time
• ✔ Suitable for sealed or open-vented primary systems
• ✔ Back-up electric immersion heating capability

Technical Specifications

• MPN: PROIN150
• Capacity: 150 litres
• Diameter: 550 mm
• Height: 1118 mm
• Empty weight: 25.6 kg
• Material: Duplex stainless steel
• Primary connections: 22 mm flow & return
• Hot water draw-off: 22 mm
• Immersion heater: 1¾” BSP 3 kW
• ErP rating: B

What’s in the Box?

1 x Gledhill PROIN150 Stainless Pro Indirect cylinder complete with cold-water inlet control set, pressure & temperature relief valve, tundish, drain valve, two-port zone valve and installation literature.