Adapter to switch from 20mm garden hose to filter pump hose. 32mm. Useful for small pools that do not have an outlet for a filter pump but for drainage. You can use this outlet to connect the filter pump.
I have printed this piece with PLA, but it may be better to use PETG or another material more suitable for water.
You can use some metal clamps to secure the joints.
Print: Print with supports with the 32mm part downside. Supports only for the external ring. Slicing it with cura do it correctly.