Burstock expansion vessel

Floor standing pressure expansion vessels for use with sealed heating and hot water systems.

10 models available of 25, 60, 80, 100, 200, 300, 400, 500, 800 and 1000 litre capacity.

Warranty 2 product item

Product information

    • Designed to work with pressurisation units to ensure system design pressures are maintained
    • Maximum working pressure 10 bar
    • Nitrogen pre-charge results in less permeation through the diaphragm extending the time between pressure top ups
    • Flexibility in use with a maximum operating temperature of 70°C
    • Wide choice of heating expansion vessels available to match your system requirements
    • All models WRAS approved to demonstrate compliance with regulations
    • Accommodates system water due to expansion in sealed heating and hot water circuits
    • Buy in confidence from a UK manufacturer with decades of commercial heating and hot water expertise.

Technical data

PV25W** PV60W
Capacity (litres) 25 60
Connection size G 3/4 " G 1 "
Max pressure (bar) 10 10
Shipping weight (kg) 5 14
Pre-charge pressure (bar) for use in:
Heating 1.7 1.7
DHW 3.5 3.5
*3.5 bar pre-charge available on request.
**Wall bracket kit variant available.


Chesil pressurisation unit and Burstock expansion vessel brochure

Product brochures 4381 kb

Burstock expansion vessel installation manual

Installers guides 260 kb

Burstock Expansion Vessel PV1000W

CAD 62 kb

Burstock Expansion Vessel PV100W

CAD 151 kb

Burstock Expansion Vessel PV200W

CAD 65 kb

Burstock Expansion Vessel PV25W

CAD 52 kb

Burstock Expansion Vessel PV300W

CAD 64 kb

Burstock Expansion Vessel PV400W

CAD 63 kb

Burstock Expansion Vessel PV500W

CAD 64 kb

Burstock Expansion Vessel PV60W

CAD 63 kb

Burstock Expansion Vessel PV800W

CAD 61 kb

Burstock Expansion Vessel PV80W

CAD 71 kb

Ideal uses/applications

  • New build.
  • Refurbishment.
  • Sealed heating and hot water systems.

Optional extras

  • There are no optional extras for this product.

Case studies

Hamworthy's wall hung Stratton boilers and Dorchester DR-FC water heaters deliver efficient heating and hot water to Nottingham University.

Nottingham University

Sector: Education

Project: A four million pound development has seen the construction of two new sports pavilions with a high demand for hot water.

Building: New build, sports complex

Application: Space heating, domestic hot water

Learn more
Christchurch Police Station installed four of Hamworthy's oil-fired steel boilers.

Christchurch Police Station

Sector: Public sector

Project: Steel boilers from Hamworthy were the ideal solution for this dual-purpose building in Dorset.

Building: Dual-purpose building – police station and adult education centre

Application: Space heating

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The Walton Communicy Hospital benefits from a modular boiler installation.

Walton Community Hospital

Sector: Hospital

Project: A community hospital in Walton-on-Thames chose a complete Hamworthy Heating package for their hospital heating and hot water refurbishment.

Building: Community hospital boiler room refurbishment

Application: Space heating 600kW, domestic hot water 1000l

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