If you are fitting a Chinese diesel heater this tee is perfect to connect to your diesel tank WITHOUT the need to remove or drill a hole in your tank This clunk clip tee simply connects to the return pipe and delivers fuel to your diesel heater. It takes just 10 seconds to fit and is by far the easiest way to connect your heater to the tank See the last photo for placement. You simply disconnect the existing pipe by squeezing the red button and pull the pipe out. Then simply click this tee into the existing pipe and reconnect For easy and no hassle auxiliary heater fuel line connection No modification to vehicle required. Simply fit in between existing connectors on fuel return line. Fitments for Chinese diesel heater for Vauxhall vivaro, Renault Trafic or Nissan Primastar 2001-2014 but may fit other vehicles Package includes 1 x Fuel Line Return Connector / T Piece