Mainsboost MB250SH Accumulator Vessel 250L Horizontal Pressure Tank for Water Boosting

The Stuart Turner Mainsboost MB250SH (Model 44750) is a robust 250 litre horizontal steel pressure vessel designed to improve water flow and pressure in properties with low mains supply. It provides around 130 litres of pressurised water volume to maintain consistent water pressure across multiple outlets.

Key Features

• 250 litre nominal vessel size with approximately 132 litre pressurised water storage capacity.
• Construction from epoxy-coated steel for long-lasting corrosion resistance.
• Durable butyl rubber diaphragm to prevent waterlogging and maintain system pressure.
• Pre-charged to 2 bar with a Schrader valve for easy pressure adjustment.
• Comprehensive ULK installation kit including isolation valve, check valve, pressure gauge, and fittings with 22 mm pipe connections.
• Floor mounted with supplied cradle for stability and secure installation.
• WRAS approved for potable water systems and comes with a 5-year warranty.

Why Buy the Mainsboost MB250SH?

Ideal for domestic and light commercial applications where booster pumps are unsuitable or noisy, this accumulator ensures smooth water flow and reduces system stress.

The durable construction, easy maintenance, and extended warranty provide a reliable and cost-effective boosting solution.

Suitable For

• Homes and small commercial premises with low mains flow but adequate pressure.
• Properties requiring water flow boosting for multiple simultaneous outlets.
• Unvented cylinder system integration to improve shower and tap performance.

Technical Specifications

• Brand: Stuart Turner
• Model: Mainsboost MB250SH-1-22
• Manufacturer Code: 44750
• Nominal Vessel Capacity: 250 litres
• Usable Water Volume: 132 litres approx.
• Dimensions (HxWxD): 540 mm x 1206 mm x 558 mm
• Weight Empty: 46 kg
• Weight Filled: 174 kg
• Maximum Working Pressure: 10 bar
• Pre-Charge Pressure: 2 bar (adjustable)
• Inlet/Outlet Connections: 22 mm compression
• Material: Epoxy coated steel with butyl rubber diaphragm
• Installation: Horizontal, floor mounted with cradle
• Certification: WRAS approved
• Warranty: 5 years manufacturer warranty

Installation & Compliance

The Mainsboost MB250SH includes a comprehensive ULK installation kit for professional fitting. This package complies fully with UK water supply regulations and is designed for maintenance ease and durability in typical residential and light commercial installations.