Log In | Checkout | 275 item(s)

1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
4 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
6 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
10 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
6 x 3rd stage C10 carbon block filter (replace every 6-12 months)
5 x Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
4 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
6 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
9 x Optional: 564 Membrane Filter Housing Wrench Opener
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
2 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x SC209, Specialty Filter Nitrate Removal Filter
4 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
2 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
2 x 3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
5 x Parts, Ro Water System Installation Parts Bag 1/4"
3 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x .AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
4 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x 6th Stage pn215 Refillable inline DI filter (color change)
1 x BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x .AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
2 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
9 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
3 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
3 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
5 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
6 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x 531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x .RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
4 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
4 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x *Discontinued* RD106
1 x 3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
2 x MKP, Maintenance kit for K5150P K6150P AR150P
5 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x 202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
3 x 205, 3rd stage solid carbon block filter (replace every 12month)
5 x 752, DC Booster Pump w/ Transformer
1 x SC207, Specialty Filter Refillable Color Changing DI Filter for
4 x 201, 1st stage sediment filter (replace every 6-12 months)
2 x 673, Replacement UV Lamp Light for 602 (6 Watts)
1 x MK420, Maintenance kit for RO565
1 x *Discontinued* RD150
2 x KT-103, Optional Manual Membrane Flush Valve
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
2 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
2 x 225UP, 5th stage Inline Alkaline upgrade (includes media)
5 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x 718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
2 x CBV-38, Tank Ball Valve to 3/8 tubing
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x 741-14, Diverter Valve for Countertop Water Units
1 x 568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle K5
2 x 288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x 277, SED1005BB Big Blue 5 micron sediment filter 10"
4 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x 4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x 741-38, Diverter Valve for RO DI Water Systems
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x PE Tubing Tube Cutter
1 x 719, Drain Saddle Clamp / Valve
1 x CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x 745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
2 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
2 x 213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x 578, TDS Water Quality Meter tds-3
2 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
2 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
2 x 214, Clear Inline Filter Cartridge Empty Case
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x N-14-1M, Nipple Fitting connector between standard RO housing
1 x 732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x 4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x 727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
2 x CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x 5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x 205, 3rd stage solid carbon block filter (replace every 12 month
1 x UU Clips Pair from Bracket to Membrane Filter
1 x SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x 759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
2 x 7044-K Union Tee Connector Fitting Compression type 1/4"
1 x FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x CKV0402, Blue color Elbow Check Valve Elbow Type
1 x 335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x 709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x 578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x *Discontinued* RO155
1 x *Discontinued* RO155C
1 x KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x 799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x SW SHELL, Countertop SW1 Empty System Only No Filter
1 x Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x 1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x DB40, DI Resin Refill Bag for DI210, RD322
1 x 6044-combo Compression Type Fitting Elbow and Tee fitting
View Cart $10,332.17

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275 item(s)

1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD322
4 x	OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
6 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
10 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
6 x	3rd stage C10 carbon block filter (replace every 6-12 months)
5 x	Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
4 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
6 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
9 x	Optional: 564 Membrane Filter Housing Wrench Opener
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle AR125
2 x	5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x	285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
1 x	SC209, Specialty Filter Nitrate Removal Filter
4 x	818, DI Resin Refill Bag 16oz (good for up to three refills)
2 x	2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
2 x	3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
5 x	Parts, Ro Water System Installation Parts Bag 1/4"
3 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	.AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
4 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x	B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x	FK-BB10K3, Big Blue Filter Pack Bundle for WH-1030 Whole House
1 x	6th Stage pn215 Refillable inline DI filter (color change)
1 x	BBK20, Replacement Filter 20" Big Blue Whole House WH-2201 WH250
3 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x	.AR122 KoolerMax 6STAGE Aquarium Reef REVERSE OSMOSIS RODI WATER
2 x	1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
9 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
2 x	602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
3 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x	FKD-66, Replacement Filter Pack SED2005 CB2010 DB40 for RD322
1 x	290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x	.AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x	KF612UP, SUBSTITUTE/Upgrade Faucet Oil Rubbed Bronze Fisnish
3 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
5 x	Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x	KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
6 x	733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
2 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x	FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x	.RD322 Aquarium 260-300 GPD REVERSE OSMOSIS RO+DI WATER SYSTEM
4 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
4 x	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x	Discontinued RD106
1 x	3150, 5th stage TFC-150 US membrane filter (every 2-3 years)
2 x	MKP, Maintenance kit for K5150P K6150P AR150P
5 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
3 x	205, 3rd stage solid carbon block filter (replace every 12month)
5 x	752, DC Booster Pump w/ Transformer
1 x	SC207, Specialty Filter Refillable Color Changing DI Filter for
4 x	201, 1st stage sediment filter (replace every 6-12 months)
2 x	673, Replacement UV Lamp Light for 602 (6 Watts)
1 x	MK420, Maintenance kit for RO565
1 x	Discontinued RD150
2 x	KT-103, Optional Manual Membrane Flush Valve
1 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
2 x	1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x	KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
2 x	225UP, 5th stage Inline Alkaline upgrade (includes media)
5 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	718TB38, Tubing, 20 feet 3/8" white LLDPE PE for drinking water
2 x	CBV-38, Tank Ball Valve to 3/8 tubing
2 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	UC SHELL, Honeywell UC7000 Empty System Only No Filter
2 x	FM90, STEEL BRACKET SINGLE HOUSING MOUNTING BIG BLUE WH SYSTEM
1 x	741-14, Diverter Valve for Countertop Water Units
1 x	568,Heavy-Duty Filter Housing Wrench, HoneyWell or FilterCold
1 x	BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x	Annual Filter Kit Koolermax Series KPAK-3 Sediment Carbon Block
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K5
2 x	288, CB1010BB Big Blue Carbon Block Filter 20K-50K gal 10"
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x	277, SED1005BB Big Blue 5 micron sediment filter 10"
4 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x	3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x	FV-14, Bobby Float Valve Side Mount RM292-12-N NSF USA
1 x	Y3414CH, Garden Hose Y Adapter Shut-Off Valve Metal Construction
1 x	4044-K Male Elbow Fitting Compression type 1/4" OD 1/4" NPT
1 x	741-38, Diverter Valve for RO DI Water Systems
1 x	213, 5th stage inline carbon postfilter (replace every 12months)
1 x	PE Tubing Tube Cutter
1 x	719, Drain Saddle Clamp / Valve
1 x	CP-OR55, O-RING FOR MEMBRANE FILTER HOUSING WaterGeneral Systems
1 x	745, AFAN0409 Female Garden Hose / Laundry Hose Adapter
2 x	701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x	316UP, Upgrade for CTA20 gal/day (includes US Membrane filter)
1 x	KF612, Elite Series: Oil Rubbed Bronze ORB Drinking Water Faucet
1 x	PSW-260 Aquatec Pressure Switch 60 psi shut off 1/4" tubing TSO
2 x	213, 5th or 6th stage inline carbon filter (replace in 12 mons)
1 x	578, TDS Water Quality Meter tds-3
2 x	MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x	Bundle Filter KPAK-104bm Sediment Carbon DI Resin Membrane
2 x	RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x	DM-1, Inline Dual TDS monitor (meter) for RO DI System DM1
2 x	214, Clear Inline Filter Cartridge Empty Case
1 x	MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle AR104H
1 x	N-14-1M, Nipple Fitting connector between standard RO housing
1 x	732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x	205, 2nd stage carbon block filter (replace every 12 months)
1 x	4042-K Male Elbow Fitting Compression type(membrane housing use)
1 x	727, Feed Water Adapter 3/8" compression adapter 1/4" inline bal
2 x	CPR-150G, Pressure Regulator with Pressure Gauge (0-125 psi)
1 x	5th stage 225 Inline Alkaline filter with clear housing (annual)
1 x	701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
2 x	FPK, 6 pcs Fitting Pack Union Connector 1/2 x 3/8 inch
1 x	205, 3rd stage solid carbon block filter (replace every 12 month
1 x	UU Clips Pair from Bracket to Membrane Filter
1 x	SV-24DC-38-Plastic, KSD Solenoid Valve 3/8" 24V DC ESO
1 x	FHP2012, 20" long Filter Cartridge Casing Housing RO260 RD322
1 x	759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x	532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x	FPK, 6 pcs Fitting Pack Union Connector 3/8 x 1/4 inch
2 x	7044-K Union Tee Connector Fitting Compression type 1/4"
1 x	FM10, STEEL BRACKET SINGLE HOUSING MOUNTING SYSTEM
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	CKV0402, Blue color Elbow Check Valve Elbow Type
1 x	335UP, Upgrade Kit TFC 35 gal/day (includes US membrane filter)
1 x	709C, Disc Shape Auto Shut Off Valve 4-way Four Way Valve
1 x	578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
1 x	350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x	755, Aquatec Demand Delivery Pump 5851-7E12-J574 Increase Output
1 x	KF355, Antique Brushed Brass / Iron Finish Drinking Water Faucet
1 x	.RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
1 x	EMT-10, Empty Filter Cartridge Casing Housing
1 x	Discontinued RO155
1 x	Discontinued RO155C
1 x	KF511, Polished Chrome Cross-Handle with Gold Trim Faucet
1 x	FPK, High Quality Fitting and Connector 3/8" (Value-Pack)
1 x	DM-2, Inline Dual TDS monitor (meter) for RO DI System DM2
1 x	CP-KOR24, O-RING Oring FOR KOOLERMAX MEMBRANE FILTER HOUSING
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x	799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x	SW SHELL, Countertop SW1 Empty System Only No Filter
1 x	Bundle Filter Annual set KPAK-104b Sediment Carbon Resin Refill
1 x	O-RING FOR WH10 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 10" CANISTER
1 x	1044-K Male Connector 1/4 OD x 1/4 NPT Compression Fitting
1 x	DB40, DI Resin Refill Bag for DI210, RD322
1 x	6044-combo Compression Type Fitting Elbow and Tee fitting

View Cart	$10,332.17

Whole House System vs RO System:

A RO system is different from a whole house system because of the Reverse Osmosis Membrane filter. RO systems make reverse osmosis water and a whole house system does not because most times, there is not a RO membrane filter. Ro units are typically used for drinking water and a whole house system is to filter the entire house. If you have space for a whole house system, you can certainly use it/install it in an apartment. None is better than the other as they serve different purposes. A whole house system still creates drinkable water.

Whole house system is not designed to remove TDS. It will remove sediment, chlorine, arsenic, and fluoride which amount to only few ppm in the water. Most of the TDS in tap water are just calcium and magnesium

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