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Course overview

The course takes one day to complete and covers training & assessment using a mixture of theory multiple choice questions, short written response and practical tasks.

Learners who have the previous Unvented Hot Water Certification are eligible to be re-assessed.

The HWSS course is accredited by LCL Awards and recognised by the Competent Person Schemes (CPS) approved to offer self-certification under Approved Document G.

Course costs include training & assessment fees, certification costs and a training manual.

Entry requirements

Learners should have experience in hot & cold water systems.  They should hold a qualification or have experience in gas, oil, solid fuel or plumbing.

Modules breakdown

Our course curriculum contains theory & practical training on the below topics:

  • Vented and Unvented systems and their operating principles
  • Design and installation
  • Maintenance
  • Compliance with other Building Regulations

Some of our clients who trust us with their training:

Our trainer, Glenn Wilson.

Other Information

Training Manuals

Learners will be given an HWSS Training Manual on the first day of their course.

What do I need to bring with me?

You should bring the following with you to your course:

  • One passport-sized photograph (if not already sent)
  • Formal ID (Passport or Driving Licence)
  • Copies of prior learnings, such as ACS or plumbing certificates

How do I book?

Call our office on 0808 164 2780 and speak to one of our friendly customer service team. They will discuss dates and availability and can take payment by debit or credit card to confirm your place.

Contact us

Very positive feedback from all staff who were on the training, great trainers and they made the topic interesting and easy to understand.

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Frequently Asked Questions

What is an unvented hot water system?

An unvented hot water system has no cold water feed tank, instead relying on direct mains pressure to operate a sealed (unvented) hot water cylinder. The unvented cylinder maintains pressure from an incoming water supply.

Because unvented systems are "sealed/closed," they need additional equipment, such as an expansion vessel, to manage the pressure fluctuations within the system as the water inside heats up.

What are the benefits of an unvented system?

Because there is no need for a separate cold water feed tank — and the piping that connects the tank to the cylinder — it takes less room. This also means they are easier and faster to install in a big commercial system.

The pressure in an unvented system is derived from the mains feed, which means it's usually greater. This means that with an unvented system, the outlet pressure is superior and taps and showers function more effectively.