Also, if a non-WaterMark certified product is installed where a WaterMark certified product is required by Volume Three of the NCC, your local plumbing authority may not accept the installation.

Some consequences of not using WaterMark certified products where required include:

• costs of replacing materials
• product failure resulting in building damage and loss, and
• possible voided insurance.

For these reasons it’s important that you look for the WaterMark on products and packaging before purchasing, to ensure the product is certified and authorised for installation. If you’re buying online, ask the supplier for this information if it’s not available on the website.

You should also have the product installed by a licensed plumber so that the installation complies with Volume Three of the NCC. Check with your local plumbing authority to ensure your plumber is appropriately licensed to undertake the work. Plumbing work undertaken by unlicensed providers can attract penalties from your local plumbing authority.