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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1 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	565, Digital Pressure Gauge Tester Monitor
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x	752, DC Booster Pump w/ Transformer
2 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x	202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x	701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x	SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x	SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
3 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x	741-38, Diverter Valve for RO DI Water Systems
2 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
1 x	6th Stage pn215 Refillable inline DI filter (color change)
1 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x	335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x	205, 3rd stage solid carbon block filter (replace every 12 month
1 x	335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)

View Cart	$1,028.50

1 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	565, Digital Pressure Gauge Tester Monitor
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
1 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	717, Tubing 15 feet 1/4" white tube LLDPE PE for drinking water
1 x	KM701C, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	WH-10, Whole House Water Treatment Carbon Filter System 10" Big
1 x	752, DC Booster Pump w/ Transformer
2 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	350UP, Upgrade Kit TFC50 gal/day (includes US membrane filter)
1 x	202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x	701C, FHC1014 Filter Housing Chamber Casing Clear Color 1/4 FPT
1 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
2 x	SC207, Specialty Filter Refillable Color Changing DI Filter for
1 x	SC445, Specialty Filter SPECIAL ALKALINE FILTER Specialty Filter
1 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
3 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x	741-38, Diverter Valve for RO DI Water Systems
2 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	UU Clips Pair Membrane to Membrane, 2.5" to 2.5"
1 x	6th Stage pn215 Refillable inline DI filter (color change)
1 x	KM701, Special Koolermax Filter Housing Canister Casing 1/4 FPT
1 x	213, 5th or 6th stage inline carbon filter (replace in 12 mons)
2 x	B2010, 20" Big Blue Filter Housing Cartridge WH20 WH25 WH250
1 x	335, 3rd stage TFC 35/45 US membrane filter (every 2-3 yrs)
1 x	205, 3rd stage solid carbon block filter (replace every 12 month
1 x	335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)

View Cart	$1,028.50