The Omnipure K-Series K5528 inline filter is a post R.O. GAC inline filter. It comes in 1/4 FPT fittings. It can also be used in ice makers, refrigerators, beverage equipment, drinking fountains, under the counter systems, R.O.Systems and in conjunction with purification systems. This filter aids in the removal of taste, odor and chlorine taste and odor. Additional Details ------------------------------ Product description: The Omnipure K-Series K5528 inline filter is a post R.O. GAC inline filter. It comes in 1/4 FPT fittings. It can also be used in ice makers, refrigerators, beverage equipment, drinking fountains, under the counter systems, R.O.Systems and in conjunction with purification systems. This filter aids in the removal of taste, odor and chlorine taste and odor.