Hi. Ive had trouble finding pipe and valves suitable to use in the uk but after much searching on 'tinternet I've found a few places that may be of use to you: https://www.pisces-aqua.co.uk/acatalog/Plastic_pipe_and_fittings.html http://cityirrigation.co.uk/acatalog/Solenoid_Valves1.html http://www....