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1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
4 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
2 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 205, 5th stage final carbon filter
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x *Discontinued* RO585A
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
2 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 706, Membrane Filter Casing Housing Assembly
2 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
3 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
4 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x MKP, Maintenance kit for K5150P K6150P AR150P
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
2 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x *Discontinued* RO585
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x *Discontinued* RO585NTF
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x HK120-P-TK for USA 110V / 60Hz
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 752, DC Booster Pump w/ Transformer
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x *Discontinued* RO6ALK
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x *Discontinued* RO155
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x *Discontinued* RO155C
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x *Discontinued* RD106
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x KT-103, Optional Manual Membrane Flush Valve

View Cart$8,807.48
Specials Log InCreate Account Checkout  Shopping Cart129 item(s)
1 x MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x 733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
4 x 532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x .K6A KoolerMax 75GPD 6STAGE Alkaline pH REVERSE OSMOSIS RO FILTE
1 x 2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x HK120-PUMP KoolerMax Aeroponics Hydroponics System Booster Pump
2 x RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x 205, 5th stage final carbon filter
1 x .K6150PNTF, KoolerMax K6150P RO System Shell without tank faucet
1 x *Discontinued* RO585A
1 x 326, 3rd stage TFC 24 /26 US membrane filter (replace 2-3 yrs)
2 x 213, 4th stage inline carbon filter (replace every 12 months)
1 x 213, 5th stage inline carbon postfilter (replace every 12months)
1 x WH-10, Whole House Water Treatment Carbon Filter System 10" Big
2 x 290, CB2010BB Big Blue 20" Carbon Block Filter WH20 WH250 WH2201
1 x 913, 5th stage inline carbon filter (every 12 months)
1 x 1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
1 x 706, Membrane Filter Casing Housing Assembly
2 x .RO260 Aquarium 300G REVERSE OSMOSIS AEROPONICS HYDROPONICS RO
3 x 701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
3 x Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x Special, Output Conversion Kit Convert from 1/4" to 3/8"
4 x Optional: 564 Membrane Filter Housing Wrench Opener
2 x Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x MKP, Maintenance kit for K5150P K6150P AR150P
2 x KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x .K5150PNTF, KoolerMax K5150P RO System Shell without tank faucet
2 x 205, 2nd stage carbon block filter (replace every 12 months)
1 x .K5NTF KoolerMax K5 RO System Shell without tank and faucet
3 x 532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x *Discontinued* RO585
1 x 285, Big Blue SED2005BB 20" Sediment filter WH25 WH250 WH2201
2 x 201, 1st stage sediment filter (replace every 6-12 months)
1 x B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x .SW-1C COUNTERTOP WATER FILTER SYSTEM (CLEAR HOUSING)
1 x MK8002, Maintenance kit for double membrane system RD322 RO260
1 x 1st stage SF05 sediment filter (replace every 6-12 months)
1 x HK120-P-TK-220V for EURO 220V / 50Hz
1 x .AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
2 x 205 2nd stage solid carbon block filter (replace every 12 month)
1 x NM-5001C, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
2 x CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x 2nd stage C10 carbon block filter (replace every 6-12 months)
1 x .AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x .AR150P, AQUARIUM & DRINKING 2 OUTPUTS Reverse Osmosis RO+DI+P
1 x *Discontinued* RO585NTF
1 x EMT-10, Empty Filter Cartridge Casing Housing
1 x KF310UP, SUBSTITUTE/Upgrade to KYTON FAUCET POLISHED CHROME FINI
1 x 350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x 532wpg, PAE RO water pressure white tank bladder gauge valve 4G
2 x 5th or 6th Stage IC21 inline carbon filter (every 6 to 12 mons)
1 x HK120-P-TK for USA 110V / 60Hz
2 x Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x 4th stage TFC 75/85 US membrane filter (every 2-3 yrs) M75
1 x 752, DC Booster Pump w/ Transformer
2 x 3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
3 x B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x WH-250, Whole House Water Treatment Sediment Carbon Filter Syste
1 x .K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x 205, 3rd stage solid carbon block filter (replace every 12month)
1 x 602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x WH-20, Whole House Water Treatment Carbon Block Filter System Bi
1 x 701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x *Discontinued* RO6ALK
2 x KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x 818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x .SW-1 COUNTERTOP WATER FILTER SYSTEM (WHITE HOUSING)
1 x 1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x NM-5104, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x NM-5102, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x .AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x *Discontinued* RO155
1 x SET8855 Aquatec 5853 Booster Pump Assembly for Aeroponics System
2 x Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x .K5 KoolerMax 75GPD 5 STAGE REVERSE OSMOSIS RO FILTER SYSTEM
1 x NM-5103, HONEYWELL COUNTERTOP WATER FILTER *DISCONTINUED* SW1
1 x MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x *Discontinued* RO155C
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x 3rd stage C10 carbon block filter (replace every 6-12 months)
1 x Special, Single Stage Housing Bracket Shell Connection Kit
1 x UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x MK200, Maintenance kit for Rotek Systems RCT-103 and RTF-265
1 x *Discontinued* RD106
1 x BUNDLE PACK ANNUAL FILTER KIT FK3 WaterGeneral 102 150 (3 ITEMS)
1 x 532bpg, PAE RO water pressure tank blue bladder gauge valve 4G
1 x OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x KF320UP, SUBSTITUTE/Upgrade Faucet BRUSHED NICKEL STAINLESS STEE
1 x 4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x HK120-P-220V KoolerMax Aeroponics Hydroponics RO + Booster Pump
1 x MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x 215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x 316, 2nd stage CTA 16 US Membrane filter
1 x Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x KT-103, Optional Manual Membrane Flush Valve

View Cart$8,807.48

531, PAE RO Storage Pressure Osmosis Water Tank Container 3G [531]

$45.00

531, PAE RO Storage Pressure Osmosis Water Tank Container 3G



* 531, RO Storage Pressure Tank, 3 Gallon, for replacement of Honeywell or Filtercold small blue tank

* Specification:
White color, outside volume 2 gallons, inside bladder holds about 2 gallons @ 60 psi input pressure

* Dimension: 9" diameter, 14" height, 1/4"MPT inlet connection

* Material:
Outside is steel, inside is a FDA approved food grade bladder. Stainless steel connection on top. Purified water only come in contact with bladder and the stainless steel connector on top. The tank is pre-charged to 7 psi.

* Meets NSF standard 58.

* Tank valve is included.

* Recommended changing every 5 to 7 years



If you'd like to know more.....
A pressure tank is used in RO systems to accumulate water and provide pressure at dispensing faucet. It has a water bladder inside the tank that holds the purified water, and outside the bladder is the compressed air. When you dispense water, the compressed air squeezes the bladder and forces the water out with pressure. You can connect several tanks together also to provide more water.

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