This cap is designed to fit the Bestway P61322 Pool Outlet Strainer - 32mm.
Can be fitted with a rubber O-Ring (80mm OD, 74mm ID, 3mm Width )
Print flat side down. 0.2mm layer height and 20% infill works well. No supports required.
Using PLA is fine they are kept in the shed most of the time and only come out once a week.
Caution, running the pump with these fitted to the inlet/outlet may cause damage to the motor. The filament used in the images was Creality Ender PLA+ Orange so I could easily identify if they had been left on before starting the pump.
The author marked this model as their own original creation.