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	Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	213, 5th or 6th stage inline carbon filter (replace in 12 mons)
3 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	.K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x	MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x	204, 2nd stage GAC filter (replace every 6-12 months)
1 x	701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x	NM-5001C, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
2 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x	Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x	.K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x	KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	KT-103, Optional Manual Membrane Flush Valve
1 x	Discontinued RO585NTF
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x	316, 2nd stage CTA 16 US Membrane filter
2 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	818, DI Resin Refill Bag 16oz (good for up to three refills)

View Cart	$1,743.50

1 x	Optional 5th or 6th Stage upgrade inline DI filter(color change)
1 x	205 2nd stage solid carbon block filter (replace every 12 month)
1 x	213, 5th or 6th stage inline carbon filter (replace in 12 mons)
3 x	532b, PAE RO Water Storage Pressure Osmosis Tank Container 4G
1 x	.K5NTF KoolerMax K5 RO System Shell without tank and faucet
1 x	MK225, Maintenance kit for Honeywell RO9100 Filtercold RO5 AV180
1 x	204, 2nd stage GAC filter (replace every 6-12 months)
1 x	701, FH1014 Filter Housing Chamber Casing White Color 1/4 FPT
1 x	NM-5001C, HONEYWELL COUNTERTOP WATER FILTER DISCONTINUED SW1
2 x	MK550, Maintenance kit for RO585, RD102, RD106, RO6, K5, K6
1 x	.AR125NTF KoolerMax AR125 RO System Shell without tank & faucet
1 x	Optional 225UP 5th stage Inline Alkaline upgrade(includes media)
1 x	Value Pack- Entire 3 Years of Replacement Filters Bundle RD106
1 x	.K5150P, KoolerMax 150GPD 5 Stage RO System w/Booster Pump
1 x	KF355UP, SUBSTITUTE/Upgrade to Antique Brushed Brass Iron Finish
2 x	Optional: 566 Filter Housing Wrench Opener WaterGeneral System
1 x	205, 3rd stage solid carbon block filter (replace every 12month)
1 x	215, 5th or 6th Stage Refillable inline DI filter (color change)
1 x	KT-103, Optional Manual Membrane Flush Valve
1 x	Discontinued RO585NTF
1 x	752set, DC Booster Pump Transformer Solenoid Pressure Switch All
2 x	201, 1st stage sediment filter (replace every 6-12 months)
1 x	KF511UP SUBSTITUTE/Upgrade Faucet CHROME GOLD TRIM CROSS HANDLE
1 x	316, 2nd stage CTA 16 US Membrane filter
2 x	CP-OR35+701 O-RING FOR WATERGENERAL BOTTOM FILTER HOUSING CASING
2 x	532w, PAE RO Storage Pressure Osmosis Water Tank Container 4G
1 x	Wrench 2 pcs 566 Standard Filter Housing Opener Double Better
1 x	818, DI Resin Refill Bag 16oz (good for up to three refills)

View Cart	$1,743.50