6 stage ro system under counter style will not stop draining or producing ro water at all I removed unit changed 3 pre filters and a post polisher now I gotta problem How long will this unit run to fill its 3 gal res .tank

A water purifier works through the process of reverse osmosis. Water purifiers cleanse water by passing it through a series of filters. This helps remove large amounts of contaminants and other harmful chemicals

Here are the steps to remove your RO system. Put a pan and a couple rags under sink to catch any water that might spill.
1. Label all the lines from RO (with masking tape) to remember where they go.
2. Turn the water off to RO system
3. Run all the water from the RO tank
4. Turn the valve off on RO tank.
5. Remove the line to the RO tank and pull tank out.
6. Remove the line to the RO drain.
a. If there is an AIR GAP faucet this line may go there first
b. plug the whole for RO drain or replace the standpipe
7. Remove the product line from RO faucet
8. Remove the water line feeding the RO system.
9. Make sure the valve feeding RO is shut off completely
a. If this valve is a piercing valve you may want to consider replacing the section of copper
plumbing because it will eventually leak if left unused.
10. When re-installing the RO remove old filters, sanitize system and replace with new filters.
RJ

Too much pressure in holding tank will not cause leaks in the RO unit. All too much pressure in tank will do is cause low or no product water in RO tank. Older Culligan RO systems (H8, H83, H5) had fittings that used metal locking washers and these can cut the RO line after the RO has been moved around while changing filters. Newer styles (AC30, Water Tower) use quick connect fittings and the RO line may work loose after filter changes and system being moved around under sink.
Turn the incoming water off to RO, turn the water off on RO tank, open the RO faucet to relieve pressure and pull the line off feeding the RO tank, inspect (you may want to cut off a small portion of the line at the filter) check the o-ring and re-install.
RJ

I would pull out all the filters changed and check them. If a GAC filter is used as the post filter, before the RO tank, carbon fines can come out of the filter and can plug up the head on the RO system. Make sure the sediment pre-filter is not plugged and there is plenty of water supply. You may have lost pressure in the RO tank. A 3 gallon tank should have 7psi pressure when totally empty.
RJ

A reverse osmosis system drinking water system will waste a certain amount of water for every gallon it produces.
1. The higher the TDS (total dissolved solids) the higher the ratio of waste water to product water.
IE: An RO on TDS of 1000ppm may require 7 or more gallons of water to waste to 1 gallon of product water. TDS of 100ppm will have about 3 gallons of waste to each gallon produced.
2. It also depends on the Membrane capacity. Membranes for residential RO systems come sized from 7-75 gallons per day. If you are a heavy water user and have a low producing membrane the RO may not shut off until it gets to rest at night and fill the tank.
3. There can also be a problem with the automatic shutoff on the RO. When the tank fills up and the pressure equalizes across the system the ASO (which is just a simple diaphram system) shuts the water off to the system.
4. If there is not enough pressure in the RO tank the tank may fill up but there may not be enough back pressure to shut the ASO off. So the waste and product water go down the drain and it runs constantly.
RJ

Mark and unhook all the tubes from the filter. Take it out and place it on a table horizontally. This is all about correct leverage.

While holding the reverse osmosis system in one hand, slide the wrench into a canister and turn it counter-clockwise.
If this still does not work, you may have to soak the filter canisters (bottom housing part ONLY) in warm water with vinegar and try the steps above again.

How to change 10 RO Pre Filters

For a 4-Stage system:
1. Open the housing caps of the components that house both the sediment and carbon filters (you may need a residential spanner wrench). Put each filter into its proper housing and tighten housing caps MANUALLY. Do not use wrench.
2. Repeat process with membrane housing and membrane (if membrane needs replacing).
3. Remove inline polishing filter by disconnecting tubing at both ends. Replace with new inline filter and reconnect tubing.

The water storage has probably lost its charge. A 3 gallon tank should have 7 psi pre-charge pressure. Tank has to be totally empty to set pre-charge. Turn water off to RO, pump air into tank to force all the water out at faucet, turn tank valve off and relieve pressure until 7psi charge.
RJ

Okay.

Here is what I would suspect at this point:
------------------------------------------------------------

- Incorrect air pressure in tank, or

- Clogged filters

To check air pressure:
---------------------------------

Empty tank and check pressure -- it should be 7 PSI.

Note: There is a rubber bladder in the tank in which the water is stored -- if this bladder is ruptured, the air pressure in the tank will not hold.

So, adjust air pressure, try system again. If it works for a while and then stops, empty tank and check air pressure for 7 PSI.

Clogged filters?
----------------------

If the system doesn't work when tank pressure is adjusted, empty tank and check pressure again. If pressure is still 7 PSI, then replace filters.

If tank pressure is not 7 PSI at this juncture, it's probably a ruptured bladder and the tank will have to be replaced. But before you take that tack we should "talk" again.


Please let me know the results...

thanks

Charlie

--------------------

P.S. I'm assuming you have adequate water pressure on your household system. You're not noticing a drop in pressure anywhere else in the house -- is that correct?

This might be a possible tank pressure issue. This could also be a clogged filter. I would first check the tank pressure by using the following steps

Necessary Supplies:
1) Tire Gauge marked in 5psi increments (ie 5, 10, 15, 20psi, etc.)
2) Bicycle tire pump for standard type bike tire valve

To recharge RO System Tank:

1) Close cold water feed valve (valve located at some point along the cold water line from street plumbing).*
2) Leaving RO tank valve on, turn tank on side & locate valve stem on bottom side.
3) Remove stem cap.
4) Drain all water out of tank through open RO faucet into sink. (Continue to leave RO faucet open throughout procedure)
5) If current tank pressure is insufficient to empty tank, apply tire pump to valve stem and pump 10 – 15 times. Exit flow will increase and then gradually decrease as pressure equalizes. Do not overcharge internal bladder of tank during this procedure.
6) Repeat step #4 until tank is completely empty. (Tank is empty when additional pumping produces no more water)
7) At this point, adjust EMPTY tank to exactly 7psi. (Gauge reading midway between 5 & 10psi is sufficient)
8) Turn off RO faucet.
9) Replace cap on valve stem and reposition tank in upright position.
10) Open cold water feed valve.*
11) System water is useable immediately, however, tank will take 3-4 hrs to completely refill.

FreshWaterSystems.com: The Water Super Store: 1-877-335-3339