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why is my reverse osmosis faucet leaking?

I have a whirlpool WHER25 reverseosmosis filtration system. It is designed with the drain hose going through the faucet! The water the filter needs to get rid of comes up RED hose to the faucet where it then sends it via black hose to the drain. Problem is that quite a bit of the water leaks from a breathing hole on the faucet...I have verified that there is nothing obstructing flow and have replaced EVERY component (I actually purchased a whole new system to replace pieces from! so this is the second system and still have same problem)

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Kitchen Faucet Accessories , Whirlpool , Building Supplies
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Manage My Life
Thanks for the information. My RO filters, pressure tank and tap are only a few months old. The tap started leaking today and after finding your thread I understood what was going on. I took a computer dust pressurized air can, put the plastic end in the air hole and could hear the air blow in the drain. Leak is gone.

I signed up to your site, good info being passed around.
by Manage My Life
September 8th, 2012
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Manage My Life
You really don't need the fresh water bypass you rigged up. The water that goes down the drain is the waste water with the deposits the RO system removed from the water in it. It just needs to go into a drain line.

The water storage tank is filled with the RO water that is made by the system. This water will build to about 30 lbs of pressure and fill the tank with this pressure. When the cut off in the RO system senses 30 lbs of pressure in the tank, it stops letting water flow through the filters and membrane. I hope this makes sense.
by Manage My Life
December 27th, 2011
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Manage My Life
Thanks for your help. I understand the air gap issue and I think I have it solved. I was wondering about the black hose that is directed to the drain after the faucet? Since I am only using my system for ice and water in 2 different refrigerators, the fauset is eliminated and therefore so is the drain from the faucet. I understand there is reject water from the system itself and there is a connection for that on the RO system to an air gapped drain, which I did. I also rigged up a jumper from the fresh water outlet of the RO through a needle valve to an air gapped drain to cover for the removal of the drain on the faucet. However, I now read where the black hose from the faucet is just a gravity drain to keep water build up drained from the faucet enclosure....or so I think. I really don't think I needed the jumper from the fresh water outlet to the drain through the needle valve?? Any ideas? Also, I struggle understanding how the tank comes into play. I realize it is fresh RO water storage, but with only one line in and out I don't really see how it ever fills up due to not being vented. Any ideas on this??
by Manage My Life
December 27th, 2011
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Manage My Life
Jim, the RO system will work fine as long as you have the drain connected to a house drain. The government worries that water pressure in the city supply could drop because of overload demand and the drain could siphon sewer water back into the RO system. This is the purpose of the air gap. I recommend you check with local plumbing codes. If there is no problem with codes, the RO system will work fine.
by Manage My Life
December 27th, 2011
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Manage My Life
Jim,
I'm NOT an expert, but my understanding is that there is always "junk" water that is discarded in the RO process, so at some point I would think that a connection to the drain line would required. The air gap is used in this process so I don't know if you can get away from it. But again, I'm not an expert so this is just logic speculation.
by Manage My Life
December 24th, 2011
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Manage My Life
I assume the reject water that goes directly off of the RO system to a sink drain (abover the P trap) meets the air gap issue. I also assume you do not need the black drain hose from the faucet since I eliminated the faucet. So my real question is if this is correct?
by Manage My Life
December 24th, 2011
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Manage My Life
Jim, you need to check the local plumbing codes. The purpose of an air gap is to be sure sewer water can't back up into a drinking water system. I suspect local codes will require an air gap in the drain line from the RO system.
by Manage My Life
December 15th, 2011
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Manage My Life
So if I hook up my RO system to only filter the water going to a refrigerator (leave out the faucet), I will not have the drain line from the faucet and I assume is not needed since there is no faucet. Would this be a correct assumption? I still have the drain line from the cartridge system going to a drain.
by Manage My Life
December 15th, 2011
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Manage My Life
I am glad you found the problem Peter. Thanks for using Manage My Life.
by Manage My Life
December 6th, 2011
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Manage My Life
Thanks. I shortened the black hose to make a more direct route to the drain pipe and that seemed to stop the constant leaking. I think I need to clear the actual drain pipe too, as whenever we run the garbage disposal water shoots out the air hole. Thanks for the help!
by Manage My Life
December 6th, 2011
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Manage My Life
Peter, disconnect the black drain hose from the house drain. Clean the inside of the drain fitting and the inside of the black hose. A pipe cleaner works well for this purpose. The reason the faucet leaks water is because the drain hose is restricted. Water backs up in the black drain hose and overflows the air gap inside the faucet base.
by Manage My Life
December 6th, 2011
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Manage My Life
I have the same problem. I even replaced the faucet and now it leaks more. I see it coming in spurts so I know that its leaking as its making water, but why? My black drain hose is curved but on a consistent downward path. What am I missing?
by Manage My Life
December 4th, 2011
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Manage My Life
Srini, water runs through the RO system and down the drain whenever the system is making and storing RO water. There is a cut off in the RO system that stops the water from running through the drain when the storage tank is full. The water cut off is done by items 11 and 12 in the parts diagram. If water is running down the drain continually, the problem is usually the diaphragm kit (item 11).
by Manage My Life
September 12th, 2011
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Manage My Life
I run into same issue of water leaking from faucet’s breather hole. It turns about to be an issue with clogged black hose. Thank you all for your inputs.
After cleaning the black hose, make sure to remove the adaptor and check for debris. Your P trap, adapter and black hose needs to clean from any debris to allow free flow of extra water.
However I didn't figure out why water flows continuously in red/black hose. I guess it’s the whirlpool design to allow extra water to flow out from red and then black hose. I am not sure whether flow of water stops when the filter is not in use.
by Manage My Life
September 11th, 2011
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Manage My Life
Mike, it sounds like you did what you should when you cleaned the drain hose and the fitting for the house drain connection. Be sure the fitting on the drain pipe doesn't have any blockage inside that can cause water to back up. Be sure the drain hose flows down continuously. If the drain hose has a dip in it, water will back up.

It doesn't matter where the drain restrictor is located in the red line. If the restrictor is missing, too much water will flow to the faucet drain and cause it to overflow. I am sending you an image that shows the air break inside the faucet base. There might be some algae built up in the small pan the water drips into causing a leak. You can usually solve this by blowing air up the black hose into the faucet. Cover the faucet with a cloth if you do this as it might blow algae onto the countertop and sink. Worst case scenario, you might need to replace the faucet.
by Manage My Life
June 9th, 2011
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Manage My Life
Hi, I have the same exact model. This is my series of things I did :

Checked the black drain tube. It was clogged, and I removed it, and totally cleared it out nicely, ran water through it just fine after it was cleared. Also cleaned out the adapter it dumps water into that leads to the main drain.

checked the red and blue tubes. When I turn the water on, water does come thru them.

Took out the plastic insert on the bottom of the faucet, cleaned it up, made sure that both O rings were on snug, carefully pushed it back in, put the screw back in.

Water still comes out of the little air gap hole. Am I missing something here? After calling whirlpool today they mentioned almost everything I had already done. In addition they asked to make sure the orange restrictor is still in the red tube where it connects to the RO unit. I found that in my unit, the red tube runs to a a little elbow, which attaches to the RO unit. between the elbow and the RO unit I think I see the little orange restrictor in the hole. Not sure if I need to remove it from the hole and stick it in the elbow though. If I do need to remove it, might need tweezers to get it out. It came from the factory already attached.

I hope this gives enough description and can help me figure out my problem, thanks!
by Manage My Life
June 7th, 2011
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Manage My Life
I am sure you know that there is an air gap inside the faucet for the RO system.

The drain water from the red hose drips into a small drain pan the black hose connects to. If the small drain pan has algae inside it, the drain water will overflow the small pan and run out of the weep hole in the faucet base.

If the drain fitting that I assume is installed in the drain line under the sink gets restricted, water will back up in the black hose and overflow the small pan. This water will run out the weep hole in the base also.

I suspect you have either algae built up in the small drain pan inside the faucet base, or a restricted drain adapter on the drain line under the sink.

If you have questions or comments, reply on this thread and I will be glad to help.
by Manage My Life
May 20th, 2011
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Manage My Life
I'm sorry about the difficulties your having with your Reverse Osmosis system. I did some research for you at Managemylife.com and found an expert answer to a similar question that I hope will help until your expert can answer your specific question. I attached the link below. I hope the provided information is useful to you. If service is required, I have attached a link to Searshomeservices.com.
by Manage My Life
May 18th, 2011
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