The installation of our reverse osmosis systems (such as the W12 or W23) can be carried out by anyone with some DIY experience, using the connection materials supplied and the illustrated installation instructions. The system is usually connected to the cold water supply under the sink and to a mains power supply. If you are unsure, we recommend having the installation carried out by a qualified plumber. Our customer service team will be happy to assist you with any questions regarding installation by telephone or email.