Din Filler with Bleeder and Extra Port This is your heavy duty din fill end. This version has two ¼” Female npt ports. This way you can hook your fill whip up and also put a gauge right at the whip end. This version is made by heavy duty and is built to last the rest of your life. The screw bleed on this version is replaceable. The din is 300 bar and it has two ¼” female npt outputs.