TDS reading ppm of the filtered water:

In time, when the DI resin gets exhausted, they will start to get smaller in size and change from light green or brown color to dark brown, almost black color. You must test the tap water going in, the water coming out of the membrane, and the DI water. All references to this information is found in the installation manual and our website. You will need to compare the three ppm numbers to each other. The water coming out of the membrane should be about 90% rejection from the tap. If it is not, it sounds like you need to replace your membrane.

Continue

1 x	5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x	NM-5102, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x	SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x	Parts, Ro Water System Installation Parts Bag 1/4"
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x	205, 2nd stage carbon block filter (replace every 12 months)
1 x	.RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	Special, Single Stage Housing Bracket Shell Connection Kit
1 x	PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x	FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x	FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x	KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish

View Cart	$1,148.93

1 x	5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
2 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x	NM-5102, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x	SV-24DC-14, Solenoid Valve ESO 1/4" plastic, 24V DC
1 x	Parts, Ro Water System Installation Parts Bag 1/4"
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x	205, 2nd stage carbon block filter (replace every 12 months)
1 x	.RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
1 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	Special, Single Stage Housing Bracket Shell Connection Kit
1 x	PSW-360 Aquatec Pressure Switch 60 psi shut off 3/8" tubing TSO
1 x	FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x	FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	FPK, 6 pcs Fitting Pack Union Connector 1/4" quarter inch
1 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x	KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish

View Cart	$1,148.93