Stuart Turner Mainsboost 350C Accumulator Vessel (Add-on Unit) – 350 Litre Composite Water Storage Vessel

The Stuart Turner Mainsboost 350C Accumulator Vessel (Add-on Unit) is a durable and high-capacity pressurised water storage vessel designed to complement existing Mainsboost systems. This 350-litre vertical composite vessel provides approximately 174 litres of usable pressurised water storage, helping boost water pressure and maintain flow rates in larger domestic or commercial properties with multiple water outlets.

Why Buy the Mainsboost 350C Accumulator Vessel?

• Large Storage Capacity: Provides a substantial 350-litre vessel size with around 174 litres usable volume for enhanced pressure stabilisation and flow support.
• Composite Construction: Made from lightweight, corrosion-resistant composite material with a robust butyl rubber diaphragm for long-lasting, maintenance-free operation.
• WRAS Approved: Fully certified for potable water use and compliant with UK water safety standards.
• Upstream Line-In Kit Included: Equipped with 22mm fittings for straightforward integration with Mainsboost pump systems.
• Low Maintenance: Silent operation with no electrical parts, ensuring minimal upkeep.
• Reliable Performance: Supports consistent water pressure and flow during peak demand without pump cycling.
• Extended Warranty: Comes with a 5-year manufacturer warranty for peace of mind.

Suitable For

• Larger domestic or commercial properties requiring increased pressurised water storage capacity.
• Mainsboost systems needing additional accumulator vessels for high flow and pressure stability.
• Environments seeking corrosion-resistant, lightweight vessel solutions.
• Applications necessitating WRAS-approved components to comply with UK regulations.

Technical Specifications

MPN: 44777

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