US21B USER MANUALVer.08/2019 Copyright ©2005-2020 ISPRING WATER SYSTEMS, LLC. All rights reserved.
Product Specifications Model US21B Flow Rate 3 - 15 GPM Peak Flow Rate 15 GPM Minimum Working Pressure 40 psi Maximum Working Pressure 90 psi Operating Temperatures 40-100 ºF (4 - 37 ºC) pH Range 2 - 11 Component List Part System Bracket with Caps Description Qty Metal bracket with 1'' NPT inlet / outlet Black caps 1 Big Blue Housing Model # HB18B 1st stage GAC carbon filter /2nd stage CTO carbon block Model # FGKS15B/ FC15B Housing Wrench Model # AWR3 Plumber’s Tape Model# ATAPE 24- inch
Step 1 – Install Water Supply Connector 1.1 Turn off the cold-water line under your sink. Open the kitchen faucet to release any pressure and ensure the water has stopped before proceeding. You can use a towel or bucket to catch any water drips. 1.2 The system comes with a complementary quick installation kit that connects the system to the existing under sink water supply. Disconnect the cold waterline from the water inlet with a wrench. 1.
Step 2 – Install Filters 2.1 Verify that the O-ring is properly seated inside the groove on top of the filter housing. A light amount of food-grade, silicon jelly may be used to help the O-ring seal better if desired but is not required. 2.2 The filter cartridges are preserved in shrink wrap. Note the direction sign on the sticker prior to removing the wrap. 2.
Maintenance Instructions Your iSpring US21B under-sink water system requires periodiccare and cleaning throughout its lifetime. It is recommended that the cartridges be replaced every 12-24 months, depending on the number of contaminants present in the water supply. If the system has been functioning properly and the pressure is slowing, this could indicate that it is time to change the filter cartridges. Replacement cartridges and parts can be ordered online at www.123filter.com or by calling 678-261-7611.
Step 3- Install the New Cartridge 3.1 Remove the new filter packaging and insert the filter cartridges into the housings, making sure they slip over the bottom standpipe. 3.2 Align the bottom of the housing with the cap and hand tighten, then use the filter wrench (AWR3) until snug.Do not over-tighten. 3.3 Close any open valves. Turn on the water supply slowly to allow the system to fill with water.Inspect carefully for leaks.
Warranty Registration Form Name __________________ Order# __________________ Email __________________ Phone ___________________ Address City Model#/ Serial Number _________________________________________________ _________ State _________ Zip Code _________ _______________________________________________ Send to: iSpring Water Systems, LLC 2480 Industrial Park Blvd, Cumming, GA 30041 678-261-7611 Plumber's information (Optional) To best serve our customers, we like to recommend good plumb
