Powerstock storage tank
Powerstock storage tank immersion heaters

Hot water storage tank. 
4 models with storage capacities of 300, 502, 750 and 990 litres.

Warranty 2 product item
Part L compliant product icon
BIM objects icon

Product information

    • Safe storage of hot water.
    • Can be easily coupled to any direct or indirect fired hot water heater system - want to know the difference between Indirect vs Direct Hot Water Systems?
    • Supplements hot water storage volumes to suit large demand applications.
    • Increases system security.
    • Easy access to plant room as most models of the Powerstock storage tank fit through a standard doorway.
    • Full project assistance with hot water sizing and selection of equipment to match the application.
    • Extensive back up and support from our team of experienced engineers across the UK.
    • Long term commitment to spare parts.
    • BIM objects available to assist in design and management
    • Available for next day delivery (dependent on stock availability, charges apply, order cut-off 12pm).

Technical data

Units ST300
General Data
ErP class C
Storage capacity l 301
Maximum operating pressure bar 10
Maximum operating temperature °C 95
Weight empty kg 87
Standby losses kW/24h 1.85


Powerstock calorifier and water storage brochure

Product brochures 2695 kb

Powerstock storage tank installation manual

Installers guides 1546 kb

Powerstock storage tank 300 front view

CAD 552 kb

Powerstock storage tank 300 plan view

CAD 103 kb

Powerstock storage tank 300 side view

CAD 513 kb

Ideal uses/applications

  • Locations with substantial and continuous hot water demands including hospitals, hotels and sports facilities.
  • To supplement hot water storage and backup the hot water system supply.

Optional extras

  • Unvented water supply kit - essential for any unvented application and includes an expansion vessel sized for the water heater and local pipework only.
  • Top to bottom pump recirculation pump kit to prevent stratification and protect against legionella within the water heater.
  • Electrical anode protection.
  • Electric immersion heater kits.
  • Choose from a wide range of service contracts to help maintain optimum performance.
  • Book commissioning at the same time as placing your order for improved warranty terms. 

Often bought with

Powerstock glass lined calorifier

Learn more

You might also be interested in

Dorchester DR-FC Evo condensing water heater

Learn more

Dorchester DR-SG stainless steel condensing water heater

Learn more