Hayward Spa and Pool Filters Model Pleatco PXST100 replacement part HM Digital FM-1 Water Filter Monitor
Your model Pleatco PXST100 uses the FM-1 HM Digital FM-1 Water Filter Monitor The HM Digital FM-1 Water Filter Monitor is a five-stage water filter monitor that uses five independent timers to let you know when to change your filters. The timers begin when the water is turned on and count down in months or days.
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