Zilmet OEM-PRO Carbon Steel Shell Heating Expansion Vessel 1/2" BSP, 6 Litre – Compact & Reliable Pressure Control

The Zilmet OEM-PRO 6 Litre Expansion Vessel is designed to maintain optimal pressure within closed heating systems, protecting your boiler and pipework from pressure fluctuations. Featuring a durable carbon steel shell and a high-quality butyl diaphragm, this compact vessel offers long-lasting performance and corrosion resistance in both domestic and commercial heating systems.

Its 1/2" BSP connection allows for easy integration into existing pipework, while the 6-litre capacity makes it ideal for small to medium-sized systems.

Why Choose Zilmet OEM-PRO 6L Expansion Vessel?

✔️ 6-litre capacity – Ideal for smaller central heating systems
✔️ Durable carbon steel construction – Corrosion-resistant and long-lasting
✔️ 1/2" BSP connection – Standard fitting for easy installation
✔️ Reliable pressure management – Prevents over-pressurisation and system damage
✔️ Compact design – Fits easily into tight spaces
✔️ Manufactured by Zilmet – A trusted brand in pressure vessels and heating components

Key Features

• Carbon steel shell with epoxy powder coating

• Pre-charged air pressure (usually 1.5 bar, adjustable)

• Replaceable internal butyl diaphragm

• Suitable for sealed central heating systems

• Helps absorb thermal expansion and maintain pressure

• Wall or floor mountable (brackets sold separately if required)

Key Specifications

• Brand: Zilmet

• Model: OEM-PRO

• Product Type: Heating Expansion Vessel

• Material: Carbon steel body, butyl diaphragm

• Connection Size: 1/2" BSP

• Capacity: 6 Litres

• Pre-Charge Pressure: Approx. 1.5 bar (adjustable)

• Maximum Working Pressure: Typically 3 bar (check label for model specifics)

• Orientation: Horizontal or vertical (depending on installation)

• Warranty: Manufacturer’s standard warranty

What’s Included?

• 1 x Zilmet OEM-PRO 6 Litre Expansion Vessel (1/2" BSP)

• Instruction manual (if provided by the manufacturer)

✨ Compact, robust, and efficient, the Zilmet OEM-PRO 6L Heating Expansion Vessel is the perfect choice for protecting your sealed system and ensuring long-term performance and safety.