Mainsboost Plus MBP 250SV - Mains water pressure boosting

Mainsboost Plus

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 22mm 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).

Technical Specification


Product code 44503, 44504, 44505
Guarantee 3 years
WRAS approval 1611336
System patent no. 2349908
Pump type Peripheral
Mechanical seal EPDM / PTFE / Al. Oxide
Flexible hoses 2
Dry run protection  
Pump body Brass
Impeller Brass
Maximum head (closed valve) 4.3 bar
Maximum working pressure* 600 kPa (6 bar)
Maximum ambient air temperature 40 °C
Min / Max water temperature** Min 4 °C / Max 35 °C
Pump connections G ¾ male
Flexible hoses
Connections 22 mm push-in x 22 mm push-in x
240 mm long
Type Induction, auto-reset thermal trip
Duty rating Continuous
Power supply/phase/frequency 230 V a.c./ 1 / 50 Hz
Current (full load) 1.8 Amps
Power consumption 398 Watts
Fuse rating 3 Amps
Power cable (pre-wired) 1.5 metres
Enclosure protection IPX4
Length 200 mm
Width 203 mm
Height (excluding hoses) 216 mm



Guarantee 5 years
Vessel capacity 132 litres
Construction Mild Steel
Membrane Butyl rubber
Connectors 1¼ " BSP x 28 mm
Diameter 535 mm
Overall height 1490 mm
Weight (dry) 43 Kg
Weight (total) 175 Kg
Weight (maximum) 283 Kg

*The maximum pressure that can be applied to the pump under any installation conditions.

**This information is per cylinder

Product Variants
Part no Description
44494 MBP 100SV-1-22
44495 MBP 100SV-2-22
44496 MBP 100SV-3-22
44497 MBP 130SV-1-22
44498 MBP 130SV-2-22
44499 MBP 130SV-3-22
44500 MBP 200SV-1-22
44501 MBP 200SV-2-22
44502 MBP 200SV-3-22
44503 MBP 250SV-1-22
44504 MBP 250SV-2-22
44505 MBP 250SV-3-22
44506 MBP 300SV-1-22
44507 MBP 300SV-2-22
44508 MBP 300SV-3-22
44509 MBP 450SV-1-22
44510 MBP 450SV-2-22
44511 MBP 450SV-3-22