Watts WP-4, WP4-50, KP-4, RO-4M RO Replacement Filters

This 4 stage RO system use sediment and carbon block pre-filters to reduce sediment, chlorine and chlorine by-products before the membrane filters out impurities larger than .001 microns. The carbon block post filter treats for taste and odor.

Replacement Filter Info

Sediment Filter (93023) - Replace every 6-12 months

Carbon Block Filter (OMB934-5m) – Replace every 6-12 months

RO Membrane TFC 24 GPD (655006-00) – Replace every 24 months

Carbon Block Filter (OMB934-5m) – Replace every 6-12 months

Helpful Filter Information

Not all filters have the same replacement schedule. Replace the RO membrane filter every two years. Replace all other filters every 6-12 months. Help keep your system sanitary by never using filters longer than 12 months, except the RO membrane filter, regardless of how much water you use.

Manuals & Instructions

Watts WP-4 System Manual