A SurePress tee has the same interior dimensions as an equivalent copper solder tee, so it doesn’t introduce abnormal restriction. The branch flow will be determined by its pipe size. As with any tee, there is a change in direction for the branch, but the pressing mechanism doesn’t add any obstruction internally. In fact, SurePress tees are full-flow designs: the outlets’ IDs correspond to copper pipe standards. You can expect the same performance in terms of flow rate and pressure drop as you would with a traditional tee of the same size. Additionally, by using a single tee fitting (as opposed to multiple fittings), you minimize extra elbows or junctions, which helps maintain good flow characteristics in the system.