Connect 32 mm pond hosetail to 1" BSP parallel (G1 / BSPP)
How to join 32 mm barb (to 1" or 1-1/4" BSP) and G1, and what stops it leaking.
These connect directly. 32 mm pond hosetail mates with 1" BSP parallel (G1 / BSPP) without an adapter.
A 32 mm pond hosetail carrying a 1 inch BSP thread screws directly onto a 1 inch BSP pump or filter port. Tape the thread, push the 32 mm hose onto the barb, and clamp it with a Jubilee clip. No adapter is needed when the barb thread matches the port.
Check the port really is 1 inch BSP and not 1 inch NPT on an imported pump. NPT and BSP are different forms at 1 inch and will not seal together without an adapter.
Related connections
Sources: Pond hosetail / BSP barb size range, Discount Leisure Products · Male BSP barbed pond hosetail connector sizes, Aquatix-2u · ISO 228-1 (G / BSPP parallel pipe threads) · BSP thread dimensions chart (ISO 228 / ISO 7), AmesWeb