This is the ideal valve to buy for installing a towel rail as dual fuel as it allows the flow/return to be located on the same side of the radiator - leaving the opposing side free for the element (so no T-Piece is required as with a standard dual fuel set-up with a pair of valves). You are able to have the flow and return going in and out of this valve as the flow goes up the tube and the return comes back down the outside of the tube. Straight orientation - can be fitted on either side of towel rail. Chrome in colour.