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Stuart Turner MainsBoost Plus MBP 300SV-2-22 Peripheral Pump & 348 Litre Vessel

MRRP £2,722.00 + VAT Our price £1,796.00 (+ VAT) Incl. VAT: £2,155.20
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Suitable for unvented systems where pressure is less than 2.0 bar and water flow is insufficient. The WRAS approved Mainsboost Plus water performance system utilises the Mainsboost system’s accumulator technology, supported by an innovative direct on mains Charger pump to provide up to 744 litres of water stored at pressure.

The Mainsboost MBP 250SV features a nominal vessel size of 240 litres and a pressurised water holding capacity of approximately 132 litres.

In addition to the boost to water flow provided by the Mainsboost vessel, the vessel mounted Mainsboost Plus pump unit is capable of boosting water pressure up to 3.5 bar.

Available in single, twin and triple vessel options, each unit is supplied with a comprehensive Upstream Line-In Kit (ULK) featuring 22 mm pipe diameter fittings.

Constructed from an epoxy coated steel body and a highly durable virgin butyl diaphragm, Mainsboost Plus MBP 250SV water performance systems are WRAS Approved and come with a 5 year guarantee (3 year guarantee on pump and fittings).


  • Flow rate up to 80 litres/minute per vessel
  • Boost water pressure up to 3.5 bar
  • 100 - 450 litre capacity vessel options
  • Quiet operation
  • Built in green energy bypass
  • Programmable pump controls
  • Robust construction
  • Long life butyl diaphragm
  • WRAS Approved product
  • 5 year guarantee (3 year guarantee on pump and fittings)
  • Includes comprehensive
  • Suitable for boosting the cold water mains supply to residential and commercial properties
  • Standard options including 1, 2 or 3 pressure vessels
  • Bespoke configurations available
  • Pump sound attenuation cover
  • Pressure vessel insulation jacket
More Information
SKU 44507
Manufacturers Stuart Turner
Manufacturers Warranty 5 Years
GTIN 5050400445074
Weight 110.0 Kg
Dimensions 1730 x 535 x 548 mm
Connection Type 22mm
Motor Size 398 Watts
Full Load Current (FLC) 1.8 Amps
Voltage 240V 1Ph 50Hz
Cable Length 1.5 metres
Max Flow Up to 80 l/min
Max Head 4.3 bar
Max Pressure 600 kPa (6 bar)
Material Mild Steel
Seal Type EPDM / PTFE / Al. Oxide
Impeller Material Brass


We offer free standard delivery to any UK address on a 3-5 working day delivery time on all orders over the value of £60 + vat. This is not weight restricted

Next day delivery is charged at £8.50 + vat for items under 35kgs.  Orders need to be placed before 5pm Mon-Thurs or 4:30 on Friday for guaranteed Next Day Delivery.

Next day delivery is not avaialble for UK Highlands and Islands. Please click the following link to view postcodes/areas that don't qualify for next day delivery.

Due to some product specifications, there may be a lead time of up to 4 weeks. This is only on a small number of products and you will be contacted upon purchase and entitled to a full refund if required.

For Items over 35kgs, please review our delivery charges here

For full delivery terms please click here

International Delivery

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If you want your order delivered to a remote area please contact our one of our Sales Representatives on 0800 112 3134 before placing your order and we will assist you further.


Unused, unaltered items may be returned at the buyers expense for credit upon Online Pump Supplies prior written consent and upon the terms specified by Online Pump Supplies.  The buyer assumes all risk of loss of such returned goods until actual receipt and acceptance by Online Pump Supplies.  Please click here to view Returns information.

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