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	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
3 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	KF750, Elite Series: Polish Chrome Drinking Water Faucet
2 x	Optional: 564 Membrane Filter Housing Wrench Opener
1 x	.AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x	4th Stage Color Changing DI Filter SC207 for AR-104H
1 x	FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x	318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	SC209, Specialty Filter Nitrate Removal Filter
1 x	3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x	818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x	MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x	581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x	SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x	3rd stage C10 carbon block filter (replace every 6-12 months)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING

View Cart	$1,254.44

1 x	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
3 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
2 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	KF750, Elite Series: Polish Chrome Drinking Water Faucet
2 x	Optional: 564 Membrane Filter Housing Wrench Opener
1 x	.AR150PNTF, KoolerMax AR150P RO System Shell without tank faucet
1 x	4th Stage Color Changing DI Filter SC207 for AR-104H
1 x	FPK11, High Quality Fitting and Connector 1/4" (Value-Pack)
1 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	531, PAE RO Storage Pressure Osmosis Water Tank Container 3G
1 x	318, 4th stage TFC-18 US membrane filter (replace every 2-3 yrs)
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	SC209, Specialty Filter Nitrate Removal Filter
1 x	3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x	818, DI Resin Refill Bag 16oz (good for up to three refills)
1 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO260
1 x	MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x	581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x	SC208, Specialty Filter Iron Lead and Heavy Metal Removal Filter
1 x	3rd stage C10 carbon block filter (replace every 6-12 months)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO585
1 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING

View Cart	$1,254.44