Like the PL-68, this filter was designed for residential applications. The cartridge design allows for easy installation and maintenance and comes with our standard baffle (tee). All A1800 Series filters feature a locking tab that securely locks the filter into the tee. With 1/16" filtration, this filter is available in 18" and 22" lengths. The 22" A1800 comes with a built in gas deflector.