Photo credits

Some photos on this site are shared by their authors under Creative Commons licences. Thank you to:

A plumber at work under a kitchen sink.: Flickr user rick, CC BY 2.0
A plumber at work under a bathroom sink.: ocean yamaha, CC BY 2.0
Push-fit connectors that join PEX or copper water pipe.: Tomwsulcer, CC BY-SA 3.0
A radiator with a thermostatic valve: Tiia Monto, CC BY-SA 3.0