Gledhill PLTIN300 300L Platinum Indirect Internal Expansion Unvented Hot Water Cylinder

The Gledhill PLTIN300 is a 300-litre nominal capacity Platinum Indirect unvented hot water cylinder with internal expansion, designed for use with conventional gas or oil boilers in sealed or open-vented systems. Manufactured from high-specification duplex stainless steel, it eliminates the need for an external expansion vessel, making it perfect for space-restricted installations in domestic properties.

Suited to trade installers and larger homes requiring high hot-water demand, the cylinder features a high-efficiency corrugated StainlessLite Supercoil for rapid recovery times, 50 mm insulation, and two 3 kW incoloy immersion heaters for primary or backup heating. It carries a 25-year warranty on the cylinder (subject to registration) and is supplied with a factory-fitted temperature and pressure relief valve.

Key Features

• Internal expansion vessel for space-saving installation
• Corrugated StainlessLite Supercoil for faster recovery
• High-specification duplex stainless steel construction
• Two 3 kW incoloy immersion heaters
• Factory-fitted T&P relief valve (6 bar / 95 °C)
• 50 mm HCFC-free insulation
• Floating baffle and lift-up T&P valve for easy drain-down
• Aligned tappings and 90° elbow for quick installation
• Secondary return connection
• 25-year warranty (2 years on inner cylinder, extendable on registration)

Benefits

• ✔ Eliminates external expansion vessel for neater, faster installs
• ✔ Delivers powerful mains-pressure hot water to multiple outlets
• ✔ Rapid reheat times reduce energy use and waiting
• ✔ Robust stainless steel build for long-term reliability
• ✔ Immersion heaters provide backup or primary heat source
• ✔ Excellent insulation minimises standing heat loss
• ✔ Easy maintenance with lift-up valve and drain-down features
• ✔ Compliant with Building Regulations Section G3
• ✔ Peace of mind from on-site warranty support

Technical Specifications

• MPN: PLTIN300
• Capacity (nominal): 300 L
• Actual capacity: 265 L
• Height: 1990 mm
• Diameter: 550 mm
• Empty weight: 51.5 kg
• Full weight: 317 kg
• Heat loss: 89 W / 2.13 kWh/24 h
• Heat-up time: 39 min
• Immersion heaters: 2 × 3 kW
• ErP rating: C
• Secondary return: Yes
• Orientation: Vertical
• Material: Duplex stainless steel
• Insulation: 50 mm

What’s in the Box?

1 × Gledhill Platinum PLTIN300 Indirect Unvented Cylinder with internal expansion, 2 × 3 kW immersion heaters, T&P relief valve, tundish, drain valve, dual thermostat, 22 mm zone valve and installation literature.