Pentair Rebel Model 360275 Tune Up Pack (360516) circuitbreakers This BP7 4kW Retrofit Kit This BP7 4kW Retrofit Kit is designed as a complete spa control system package for compatible applications where a simple one part repair is no longer the best answer The multiple cartridge references give this part practical value because replacement filters are best chosen by matching known identifiers to the intended housing Refreshing the unit with a matched Pentair pack can help restore cleaner operation without replacing the whole cleaner This kind of replacement is especially helpful when the cleaner is still usable but clearly showing signs of age