I use a 1" male/male hex from outlet, 1" female/male elbow, 1" female/female butterfly valve, 1" male barb then 1" hose going onto barb, all in stainless steel available from B.E.S. Remember the bigger the bore the quicker the backpack will fill. With you needing to come out from a 3/4 equal tee you could maybe use a 3/4 to 1" hex nipple to increase the bore to 1", or you could drill a separate 1" outlet