Cylinders are used to store domestic hot water and come in 3 main types:

  • Direct Cylinders heat water using an internal heat source. For a Direct cylinder, there are no external. A direct cylinder is usually integrated with an electrical immersion heater

  • Indirect Cylinders heat water using an internal coil. The heat source will be remote, in most cases, this will be a boiler fed heating system but can also include a top immersion heater

  • Solar Cylinders have two internal coils. The lower coil is heated by the solar thermal system and in most cases, the upper coil is heated by a boiler.

Vented & Unvented Cylinders

If you have a system or open vented boiler fed system, you will need to make sure that you are choosing the right cylinder to suit your home, be sure to give us a call or come into one of our branches and we will be happy to help

  • Vented Cylinders work with a domestic cold water header tank and are predominately copper cylinders. They are used in an open vented hot water system.

  • Unvented Cylinders are typically made from strong duplex steel and are designed for use within a sealed domestic hot water system, they use either a built-in or an attachable expansion vessel to deal with pressurised heated water.

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Company Info

Copyright © 2019 The Plumbing Supplies Company Limited, Trading as Plumco Ltd

Registered in England No. 4032908

191 Woodbourn Road, Sheffield, S9 3LQ

Tel. 0114 261 8200 Fax. 0114 261 8300

Opening Hours

Mon - Fri: 7:30am - 5pm

Sat: 8am - 12pm

Sun: Closed

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