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.

Continue

2 x	EMT-10, Empty Filter Cartridge Casing Housing
2 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x	399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
2 x	Optional: 564 Membrane Filter Housing Wrench Opener
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x	Discontinued RO585NTF
1 x	NM-5102, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	.AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x	385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x	FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
2 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x	DB40, DI Resin Refill Bag for DI210, RD322
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	.K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump

View Cart	$1,847.99

2 x	EMT-10, Empty Filter Cartridge Casing Housing
2 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	581, Ice Maker Hookup Kit Connect RO water to Fridge Ice Maker
1 x	399, 4th stage TFC-100 US membrane filter (every 2-3 yrs)
2 x	Optional: 564 Membrane Filter Housing Wrench Opener
1 x	Special, Output Conversion Kit Convert from 1/4" to 3/8"
1 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
1 x	Discontinued RO585NTF
1 x	NM-5102, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle K6150P
1 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	4044-K qty 2 Male Elbow Fitting Compression type 1/4"
1 x	Optional 566 Filter Housing Wrench Case Opener KoolerMax System
1 x	.AR125 Dual Outputs Aquarium & Home Drinking RO Filter System
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD150
1 x	385, 4th stage TFC 75/85 US membrane filter (every 2-3 yrs)
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	602, UV Ultra Violet Sterilization Light Bulb ystem (6 watts)
1 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x	FK-53, Replacement Filter Pack SED2005 CB2010 for RD322 RO260
2 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	2nd stage C10 carbon block filter (replace every 6-12 months)
1 x	3.CB2010, 3rd stage carbon block filter 20" inch for RD322 RO260
1 x	DB40, DI Resin Refill Bag for DI210, RD322
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	.K6150P, KoolerMax 150GPD 6 Stage RO System w/ Booster Pump

View Cart	$1,847.99