Doing a garage conversion and now need to fit the rad/pipes before plaster work commences..when got CH fitted about 2 years ago I asked the engineer to leave me a feed/return stumped just above the garage ceiling which he has and he used 10mm jg speedfit and capped it, could I just fit a radiator and pick up these pipes or will and use pushfit connectors or will it be more involved this draining the system and balancing the rads............if it is I will get somebody in but just fancied a go myself.