Arsenic Removal Double Under Sink Water Filter System is dependable and built to last for years and effectively removes ARSENIC from water. Multistage provides (1-3 years/10,000 gallons)* of quality safe and pure water. All Crystal Quest® GAC is a mixed blend of coconut shell and catalytic GAC to address both chlorine, chloramines and these byproducts. Easy to use and install on all standard sinks. Please note: When considering installation, if current under sink plumbing is hard copper tubing the saddle valve would be used; for flex tubing the T-valve would be required. While ordering a prompt will require that an installation valve be specified in order to progress through the order entry screen. WATER TRAVELS THROUGH 7 STAGES OF FILTRATION Stage 1: W ater travels through an Arsenic-selective resin cartridge, designed specifically for reducing arsenic. Capacity: 1000 gallons, depends on the arsenic type & ppb of influent wat Stage 2: Water flows through a one-micron filter pad which removes suspended particles such as silt, sediment, cyst (Giardia, Cryptosporidium), sand, rust, dirt, and other undissolved matter.* Stage 3: Water passes through coconut shell granulated activated carbon (Arsenic-Free GAC™). GAC is universally recognized and regularly used as an effective adsorbent for removing a wide variety of organic contaminants, bad taste and odors from drinking water. Stage 4: Water flows through the ion exchange resin, reducing heavy metals such as lead, copper, aluminum, and water hardness. Stage 5 & 6: Water flows through a bed of media made of a special high-purity alloy blend of two dissimilar metals - copper and zinc (Eagle Redox Alloy® 6500 and Eagle Redox Alloy® 9500.) Chlorine and chloramines are instantaneously and almost inexhaustibly oxidized. Stage 7: Water flows through another one-micron filtration pad for further reduction of undesirable particles. The end result is a great reduction or the total elimination of a wide variety of contaminants. Min Operating Pressure: 20 psi (pounds per sq. in.) Max Operating Pressure: 60 psi (pounds per sq. in.) Min Operating Temperature: 40 degrees F Max Operating Temperature: 90 degrees F Max Flow Rate: 0.3-0.5 gallons per minute The pre-filtration filter is not available for undersink models. Dimensions: 10"L x 14"H (10"x 4" to change cartridge) x 5" Suggested flow rate: .50 or less gallon per minute Weight: 13 lbs.