OMNIFilter whole house cellulose impregnated carbon paper cartridges are used for the reduction of sand, dirt, sediment and rust particles and also help to reduce taste and odors. Helps to protect your plumbing and appliances from getting plugged with sediment causing costly repairs. They also reduce taste and odors making the water more pleasant. They are a cost effective solution for homes with sediment problems when used on chlorinated water supplies.