Diffuser O-Ring Other Products Using This Part: Model Number Product Name 012530 WhisperFlo High Performance, 3/4 Horsepower, 2 Speed, Full Rate, Energy Efficient Pump. 115v 011579 WhisperFlo 3/4 Horsepower, Full Rate In-ground Pool Pump. 115/230v 011774 WhisperFlo 2 Horsepower, Up-Rated In-ground Pool Pump. 230v 011772 WhisperFlo 1 Horsepower, Up-Rated In-ground Pool Pump. 115/230v 011773 WhisperFlo 1-1/2 Horsepower, Up-Rated In-ground Pool Pump. 115/230v 011579 WhisperFlo 3/4 Horsepower, Full Rate In-ground Pool Pump. 115/230v 011774 WhisperFlo 2 Horsepower, Up-Rated In-ground Pool Pump. 230v 011773 WhisperFlo 1-1/2 Horsepower, Up-Rated In-ground Pool Pump. 115/230v 011772 WhisperFlo 1 Horsepower, Up-Rated In-ground Pool Pump. 115/230v 011518 WhisperFlo High Performance 1-1/2 Horsepower Up-Rated Energy Efficient In-ground Pool Pump. 115/230v