John Guest reducing elbow
90° fitting for connecting two tubes of different diameters, combining reduction and change of direction in a single piece.
Configurations
Variants include different reductions between imperial and metric sizes, such as 3/8" to 3/16", 1/4", 5/16" or 1/2", plus metric options depending on availability.
Practical use
It is useful when a main line changes diameter and also needs to turn 90°, avoiding the need to install a separate reducer and elbow.
Selection
Measure the outside diameter of both tubes. Do not assume equivalence between metric and imperial sizes.
Installation
Work unpressurized, cut both tubes square, identify each side of the variant and insert fully. Check for leaks before operating.
Frequently asked questions
Is it the same as a standard elbow?
No; it connects different diameters.
Does it matter which tube goes on each side?
Yes, it must match the sizes of the variant.
Can it save another fitting?
Yes, it combines reduction and a 90° turn.
How do I avoid mistakes?
Check both outside diameters before selecting.
