If you own a Manitowoc Tri-L filter system, this is the replacement sediment prefilter. Regular replacement of this inexpensive prefilter will keep your primary system working at peak efficiency while saving you time and money. The Manitowoc Tri-Liminator Replacement icemaker Prefilter Cartridge fits Manitowoc Tri-L filter systems. Reduces sediment to substantailly increase the filter life of your primary filter system. Spun polypropylene construction is bacteriostatic and highly effective at reducing sediment. Less expensive than primary carbon filters.