Which Valves do I need? Choosing your radiator valves can be a little confusing here is a guide for you to find the correct valves for your radiator: Pipe work is coming out of the floor and the radiator has side connections you will need a set of Angled valves. Pipe work is coming out of the floor and the radiator has underneath connections you will need a set of Straight valves Pipe work is coming out of the wall and the radiator has side connections you will need a set of either Angled valves or Corner valves. Pipe work is coming out of the wall and the radiator has underneath connections you will need a set of either Angled valves or Corner valves.