Sim/Tech STF-110 4" Septic Tank Bristle Filter w/Housing FREE SHIPPING!! STF-110 Superior, Flexible, Economical, Easy, Simple! The filter is approximately 26.25" tall Designed with non-directional bristles for unrestricted flow of effluent Allows biological maturing and sloughing to maximize septic tank efficiency Provides well over 1/2 mile of filtration media with over 319 cu. in. of open area to eliminate clogging 2,215 sq. in. of filtering surface allow a flow rate of over 1200 GPD, filtering to 1/16" diamater Filtering surface is achieved with unique triangular bristle that more than doubles the filtering surface, with no uniform holes or slots to plug 90 degree handle for easy installation and removal Adapts to all types of 4" pipe Self-locking bristles hold the filter firmly in place, eliminitatin "filter float up" Flexible design makes it easy to install in hard to reach places and makes replacing the filter a breeze The filters designed shape creates a debris separation space which naturally sorts debris according to size and mass, ensures even filter usage for a long lifespand and maximizes circular flow This listing is for the 4" Sim/Tech Bristle Filter with 4" Baffle Housing. The STF-110 series filters use triangular polypropylene bristles wound together with a 316 stainless-steel core. This makes them durable enough to be serviced and economical enough to be replaced. This provides an economical solution for protecting and servicing all types of wastewater systems at a fraction of the cost of inferior designs. This item ships UPS Ground and is fully insured and tracked. FREE SHIPPING!