mains connection to wash basin Home › Forums › Public Forums › General Plumbing › mains connection to wash basin This topic has 1 reply, 2 voices, and was last updated 23 years, 10 months ago by fourth year. Viewing 1 reply thread Author Posts 14 Mar 2001 at 10:22 pm #274768 MasterPlumbersKeymaster is it necessary to include one way valve to the cold feed if the cold feed to the washbasin is connected to water mains? Is it a requirement that cistern and bath cold feeds have to come from water mains? Thanks in anticipation 15 Mar 2001 at 3:08 pm #290415 fourth yearParticipant You will have to have one of our British plumbers help you with that problem. Author Posts Viewing 1 reply thread You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In