Water running continuously nonstop drain when tank is full:

The drain should stop when the tank is full and you're not using water.

If the water keeps draining, then there are 2 possibilities:

1. the auto-shut-off valve is not functioning correctly, need to replace the valve. This is the device that has 4 tubing connected to it. It looks like a square block or disc shape

2. the check valve is not working correctly.

Both are wearable parts that need to be changed every 2 to 3 years along with the membrane flow restrictor.

Here's the part you need: RO Maintenance Kit Please make sure to select the corresponding maintenance kit for your RO system model. Any questions please feel free to email us.

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1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
2 x	Optional: 564 Membrane Filter Housing Wrench Opener
2 x	Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x	O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x	Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x	1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
5 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x	OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x	MK8002, Maintenance kit for double membrane system RD322 RO260
1 x	MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x	213, 4th stage inline carbon filter (replace every 12 months)
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x	214, Clear Inline Filter Cartridge Empty Case
2 x	201, 1st stage sediment filter (replace every 6-12 months)

View Cart	$706.00

1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	335, 4th stage TFC 35/45 US membrane filter (every 2-3 years)
2 x	Optional: 564 Membrane Filter Housing Wrench Opener
2 x	Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x	O-RING RINGS FOR WH20 WHOLE HOUSE SYSTEM HOUSING BIG BLUE 20"
1 x	Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RO155
1 x	1.SED2005, 1st stage sediment filter 20" inch for RD322 RO260
5 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	1st stage SF05 sediment filter (replace every 6-12 months)
1 x	FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
1 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x	OPTIONAL: 567 Filter Housing Wrench Case Opener WHOLE HOUSE WH
1 x	MK8002, Maintenance kit for double membrane system RD322 RO260
1 x	MK300, Maintenance kit for RO535, RO435, RO545, AR104H
1 x	213, 4th stage inline carbon filter (replace every 12 months)
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	MK800, Maintenance kit for AR122, AR125, HK120, RD150, RO155
2 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	733, Built-in Pressure Gauge 0 to 150 psi for Koolermax RO syste
1 x	Annual Filter Kit Koolermax Series KPAK-4 Sediment Carbon Block
1 x	214, Clear Inline Filter Cartridge Empty Case
2 x	201, 1st stage sediment filter (replace every 6-12 months)

View Cart	$706.00