Replacement Water Filters & Accessories /
The Pre-filter replacement cartridge is made for the GLW-500 Whole Home Water Filter. This filter provides protection against dirt and sediment particles entering and clogging the main filter unit. Replace this filter every 3-6 months.
For use with the GLW-500 Whole Home Water Filter (500,000 gallon), the Pre-filter Replacement Cartridge comes in a 4-pack and should be replaced every 3-6 months. The filter should be changed when water color darkens or the water flow slows.