The APEC Spot-Free Car Wash Filter System effectively remove all of its mineral ions to produce ultra-high purity water without developing scale buildup. This point-of-use combo system can effectively filter out mineral ions such as sodium, calcium, iron, copper, chloride, sulfate, nitrates, phosphates, silica, and ammonia to deliver clean and spotless water to your water hose. Maximum Dimensions: 12″ x 19″ x 35″ Weight: 51 lbs Maximum Temperature: 100ºF Maximum Pressure: 90 psi Initial Pressure Drop: 1 psi @ 15 GPM flow rate Input & Output Line Size: 3/4″ FPT Bypass Adapter Standard Capacity (gal.): 50 ppm = 1200 gallons 100 ppm = 600 gallons 200 ppm = 300 gallons 300 ppm = 200 gallons 400 ppm = 150 gallons 500 ppm = 120 gallons