Mainsboost Charger Vessel Mount (Horizontal) MJ3 HM

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Mains Boost Pump

Where vertical space is not an issue the Mainsboost vessel mounted Charger pump may be the answer. Mainsboost vessel mounted Charger pumps offers the same performance benefits as the wall mounted variant and can be used in conjunction with Mainsboost Steel vessels.


Please note that Mainsboost Charger pumps are not available as a stand alone purchase and must be ordered in conjunction with a Mainsboost vessel system.

5 Year Warranty WRAS Approved Product UKCA-CE
Mainsboost Charger Vessel Mount (Horizontal) MJ3 HM
Key Features
  • 5 year warranty
  • Boosts mains water pressure by 3.5 bar
  • Compatible with all Mainsboost horizontal steel pressure vessels
Technical Specification
Product Code 41729
Warranty 5 years
WRAS WRAS Approved Product (1501305)
Conformity Certification UKCA, CE
System patent no. 2349908
Typical noise From 50 dB(A)
Bypass 22 mm
Mounting Horizontal Vessel
Pump type Peripheral
Flexible hoses 2
Dry run protection
Pump body Brass
Impeller Brass
Mechanical seal EPDM / PTFE / Al. Oxide
Maximum head - closed valve 4.3 bar (43 metres)
Maximum working pressure* 600 kPa (6 bar)
Maximum ambient air temperature 40 °C
Min / Max operating 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 (S1)
Power supply (Vac/Ph/Hz) 230 V a.c. / 1 / 50 Hz
Power consumption - P1 398 Watts
Current - full load 1.8 Amps
Fuse rating 3 Amps
Power cable length 1.5 metres (pre-wired)
Enclosure protection IPX4
Pump length 200 mm
Pump width 203 mm
Pump height 216 mm
Weight - including fittings 8.1 Kg
GTIN 13 DIGIT 5050400417293
* The maximum pressure that can be applied to the system under any installation conditions.