Stuart Turner Mainsboost 250S Accumulator Vessel (Add-on Unit) – 250 Litre Cold Water Storage

The Stuart Turner Mainsboost 250S Accumulator Vessel (Add-on Unit) is a high-capacity pressurised cold water storage vessel designed to expand existing Mainsboost systems. With a nominal size of 250 litres and a usable cold water storage capacity of approximately 110 litres, this add-on unit ensures enhanced flow and pressure stability for medium to large domestic or commercial water systems.

Why Buy the Mainsboost 250S Accumulator Vessel?

• Expandability: Effectively increases storage capacity in multi-vessel Mainsboost booster systems, providing enhanced pressure buffering and water flow during peak demand.
• Robust Construction: Made with an epoxy-coated steel body and a durable virgin butyl diaphragm for long-lasting, maintenance-free operation.
• WRAS Approved: Certified for safe potable water use and compliance with UK water regulations.
• Minimal Maintenance: Silent operation with no electrical consumption or moving parts, reducing upkeep requirements.
• Simplifies System Upgrade: Adds capacity without complicated plumbing changes or system modifications.
• Comprehensive Kit: Supplied complete with Upstream Line-In Kit (ULK) with 22mm fittings for easy installation.
• Long Warranty: Backed by a 5-year manufacturer warranty for reliable performance peace of mind.

Suitable For

• Mainsboost systems requiring additional water storage capacity to meet high flow or pressure demand.
• Medium to large domestic or commercial properties with multiple bathrooms and water outlets.
• Situations where pressure vessel capacity needs to be expanded for sustained water delivery.
• Installations compliant with WRAS and UK water safety regulations.

Technical Specifications

MPN: 44626

Please note: Delivery times may vary depending on location, with specific details outlined below.

Standard Delivery

UK Mainland 

• Delivery Time: 2–4 working days
• Free Delivery on all orders

Express Delivery

UK Mainland

• Delivery Time: 1–3 working days
• Delivery fee of £15

Channel Islands

• Postcodes Covered: GY*, IM*, JE* 
• Minimum Order: £50
• Delivery Fee: £70

Northern Ireland, Offshore Territories & Scottish Islands 

• Postcodes Covered: BT*, HS*, KW, ZE
• Minimum Order: £50
• Delivery Fee: £35

Same Day Delivery 

• Eligible Postcodes:
  E*, EC*, N*, NW*, SE*, SW*, W*, WC*, HA*, UB*, EN*, IG*, RM*, KT*, SM*, CR*, BR*, DA*, TW*
• Minimum Order: £50
• Same Day Delivery Fee: £60
• Special Requests or Locations:
  For areas outside these postcodes or urgent quotes, please email orders@qualityheating.co.uk and we’ll do our best to accommodate.

Collections

Want to collect your order instead?You’re welcome to do so — just email us at orders@qualityheating.co.uk or message us via WhatsApp with your preferred collection time, and we’ll confirm the details.

Collection address: 284 Water Rd, Unit 9, London, HA0 1HX