These 90 Elbow fitting comes with slip socket ends so you can glue in our 50mm flexible pond piping both sides.
90-degree elbows are used when you want a sharp turn in your flexible pond piping like coming around a corner into the back of a bio-falls or a spillway box.
When installing these 90 degree elbows you need to make sure your head pressure calculations are taking these turns into account. As these sharp turning fitting put back pressure on the water feature pumps.
Approximately an extra 30cm of head pressure for each 90 degree elbow.