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	3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x	SC209, Specialty Filter Nitrate Removal Filter
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	Parts, Ro Water System Installation Parts Bag 1/4"
1 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x	.K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x	7044-K Union Tee Connector Fitting Compression type 1/4"
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x	Discontinued RO585
1 x	RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x	UU Clips Pair from Bracket to Membrane Filter
1 x	Special Filter Kit Koolermax dealer distribution kit
1 x	UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x	202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x	2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x	N-14-1M, Nipple Fitting connector between standard RO housing
1 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x	NM-5001C, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	214, Clear Inline Filter Cartridge Empty Case
1 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	.K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x	B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x	1st stage SF05 sediment filter (replace every 6-12 months)

View Cart	$1,429.95

1 x	3150, 4th stage TFC-150 US membrane filter (every 2-3 yrs)
1 x	SC209, Specialty Filter Nitrate Removal Filter
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	Parts, Ro Water System Installation Parts Bag 1/4"
1 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x	.K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x	7044-K Union Tee Connector Fitting Compression type 1/4"
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x	Discontinued RO585
1 x	RF62, Replacement filter for CT-6000, UC7000, SW-1, and SW-1C
1 x	UU Clips Pair from Bracket to Membrane Filter
1 x	Special Filter Kit Koolermax dealer distribution kit
1 x	UC SHELL, Honeywell UC7000 Empty System Only No Filter
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO6ALK
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x	202,1 MICRON Sediment filter (replace every 6-12 month) SED1001
1 x	2.CB2010, 2nd stage carbon block filter 20" inch for RD322 RO260
1 x	N-14-1M, Nipple Fitting connector between standard RO housing
1 x	4th stage TFC150 US membrane filter (every 2-3 yrs)M150 P/N3150
1 x	NM-5001C, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	214, Clear Inline Filter Cartridge Empty Case
1 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	.K6NTF KoolerMax K6ALK RO shell without tank and faucet
1 x	B2012, 20" Long Slim Filter Cartridge Housing RO260 RD322
1 x	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
1 x	1st stage SF05 sediment filter (replace every 6-12 months)

View Cart	$1,429.95