Following is a guide to the tank wall thickness that can be accommodated with the Long Tail Adaptors when used with Hansen Female Bend fittings.
15mm Long Tail Adaptor = 14mm Trough/Tank Wall
20mm Long Tail Adaptor = 22mm Trough/Tank Wall
25mm Long Tail Adaptor = 19mm Trough/Tank Walll
32mm Long Tail Adaptor = 24mm Trough/Tank Wall
40mm Long Tail Adaptor = 24mm Trough/Tank Wall
50mm Long Tail Adaptor = 24mm Trough/Tank Wall
If you require additional adaptors, please see the Valve Spare Parts listing