Gas Safe Registration

Oz Plumbing & Heating Systems Ltd takes gas safety seriously. All of our engineers are on the Gas Safe Register and will have their official identity card when you ask to see it.

Gas Safe Register is the official gas safety organisation in Great Britain. It replaced CORGI on 1st April 2009. Gas Safe Register is responsible for the registration and regulation of gas engineers. Membership is mandatory for any company or engineer working with gas appliances.
If you would like to find out more about Gas Safe Register you can call 0800 408 5500 or visit the Gas Safe Register website.

Vaillant accredited Installer

Oz Plumbing and Heating Services LTD are approved installers of boilers in Watford and the surrounding area. This means our engineers have been trained by Vaillant in their Centres of Excellence, ensuring we can offer the best service possible when installing your new boiler. It also means we can offer extended guarantees of up to 7 years on Vaillant products, providing you with extra peace of mind.

Why choose Vaillant?

Vaillant have been in business for over 140 years and are established market leaders in developing and manufacturing innovative heating and hot water systems. Their high tech products offer cutting edge technology as part of Vaillant's promise to always ‘think ahead’. Their boilers achieve extremely high standards of quality, performance, reliability and efficiency. Vaillant produce some of the most economical and environmentally-friendly heating systems on the market. As such they are always popular with conscientious home-owners looking to cut their bills and their carbon footprints

As well as installing boilers, Vaillant are accredited to install heat pumps and underfloor heating to the highest standard.


As members, we are proud to be part of which runs strict background checks on tradespeople. Once they join, members agree to have feedback and reviews from their customers put online for all to see.