Why install booster pump before 4th stage membrane:

Install the booster pump before stage1 is easier but the solenoid valve and pump may get dirty water and debris from water supply hence shorten the life of the solenoid valve and pump. Also the bottom 3 filters will not see high pressure to prevent bursting of filter housing. The pressure switch can be installed anywhere after the RO membrane on the pure water side. Either way works.

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2 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x	Optional: 564 Membrane Filter Housing Wrench Opener
2 x	KT-103, Optional Manual Membrane Flush Valve
2 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x	732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x	Discontinued RD106
1 x	578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x	1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x	Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x	FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x	WT-bac, Water Testing Kit, Bacteria Test
1 x	799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x	673, Replacement UV Lamp Light for 602 (6 Watts)
1 x	FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x	671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x	.AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	578, TDS Water Quality Meter tds-3

View Cart	$1,495.95

2 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle HK120
1 x	Optional: 564 Membrane Filter Housing Wrench Opener
2 x	KT-103, Optional Manual Membrane Flush Valve
2 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	FM-8100TG44, DigiFlow Digital Water Flow Rate Meter
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x	732, Inline Pressure Gauge 0 to 300 psi for RO filter system
1 x	Discontinued RD106
1 x	578b, TDS-3 Battery Batteries for #578 TDS Water Quality Meter
1 x	1070, PAE LARGE RO Storage Pressure Tank 14 GALLON 14G
1 x	Bundle Filter KPAK-104m Sediment Carbon Block DI Resin Membrane
1 x	FM214G 1/4" NPT Digital Flow Meter count up total Water Gallons
1 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	759, Aquatec Demand Delivery Pump 5853-7E12-J524 Commercial 1.7G
1 x	WT-bac, Water Testing Kit, Bacteria Test
1 x	799, Siphon Pump Drinking Water Liquid Fluid Oil Manual Trasfer
1 x	673, Replacement UV Lamp Light for 602 (6 Watts)
1 x	FM-8000T, DigiFlow Digital Water Flow Meter Rate Count Down
1 x	671C, Replacement UV Lamp Light for 609C (16 Watt)
1 x	.AR104H High Efficiency Membrane Aquarium Reef Aeroponics RO DI
1 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x	532wpg, PAE RO water pressure white tank bladder gauge valve 4G
1 x	578, TDS Water Quality Meter tds-3

View Cart	$1,495.95