Question about Culligan Under Sink Water Filter

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How do you know if you need to replace the RO membrane filter in the culligan good water machine

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A TDS (total dissolved solids)meter is needed to test the Reverse Osmosis water and compare it to the feed water to determine how much TDS is being removed. Reverse osmosis membranes are designed to remove 80-95% of the TDS in your water supply.

For example: If your water has 500ppm of TDS the minimum TDS removal should be 400ppm leaving 100ppm. If the TDS from the Reverse Osmosis System drops to these levels it is time to change the Membrane.
Typically an RO system will consistently remove 90+% of TDS for many years. The normal lifespan for a membrane can be anywhere from 3-10 years. It all depends on the TDS of your water and your water usage. The higher the TDS the more frequently the membrane needs replacing. The other filters should be replaced every 6 months to keep the quality up and protect the membrane.
A TDS of 1000ppm compared to 100ppm is much more difficult remove to acceptable levels. I like to compare 1000TDS to taking muddy water, forcing it through a filter and getting drinking water. Where 100TDS may be more like a clear glass of water. Consequently a reverse osmosis system on high TDS will be less efficient, less gallons produced and filters will need to be changed more frequently to keep the quality and quantity up.
RJ

Posted on May 17, 2011

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Culligan AC-30 Howling Noise


yes you answered your questions there. i researched info and more than likely it is the valve

http://watersoftenernews.blogspot.com/2014/02/culligan-water-softener-noise.html

Oct 13, 2014 | Culligan RO Compatible AC30 Compatible...

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I changed all filters as per manual and cant get any water on the faucet. Pressure at storage tank is good at 7psi. But i got water after removing the RO filter. Any idea what would be the root cause?...


Check the capillary tube to make sure it is not plugged. This will restrict the flow from membrane. Also make sure the seal for membrane is not damaged. It takes several hours to refill the RO tank if it is empty.
RJ

Oct 03, 2011 | Culligan Under Sink Water Filter

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Have an under sink Culligan RO system with 4 potential filters but it only uses 3 (was so installed by Culligan). Filters are labeled - reading left to right Sediment SED10 ...


Pre-filter and carbon block filter are changed annually. The membrane is only changed every 3-7 years depending on water quality coming in, TDS and usage. Fourth filter is an in-line carbon filter that goes on the line up to the RO faucet.
RJH2O

Aug 12, 2011 | Culligan Compatible RO Prefilter AC30AC15...

1 Answer

My RO light has changed from red to green. What does that mean? Red was the normal color.


Green is the color it should be when producing GOOD (low TDS) water. A constant Red light indicates the TDS is high (relative to what the normal TDS rejection is on your water supply) and the membrane needs to be replaced. Frequently the TDS light will be RED when initially drawing water at the RO faucet because of a spike of TDS coming through membrane from static water in line.
I suggest taking a sample of pretreated water and RO water to a dealer for a TDS test to see if the Membrane needs replacing.
RJ

Jul 30, 2011 | Culligan Under Sink Water Filter

1 Answer

I have a Culligan AC 30 aqua-cleer drinking water system;after changing the particle filter and the carbonfilter , the storage tank does not fill.I have pumped air in it to pressure 0,7 bar.


When you put air in the tank did you make sure all the water was out of tank? In a three gallon tank there should be 7 lbs of air, 10 gallon 10 lbs of air.
There can be many reasons for no water in tank.
1. Bad bladder in holding tank. No back pressure on membrane (all water going to drain)
2. Faulty membrane (all the water going to drain)
3. Bad capillary tube (all the water going to drain)
4. Plugged check valve at top of membrane (no water)
5. Faulty water feed valve (piercing valve)
6. Fines from post carbon filter have plugged up the manifold (head) of RO unit.
7. Bad valve on RO tank
8. Plugged drain line
RJ

Jul 30, 2011 | Culligan Under Sink Water Filter

1 Answer

How do I know which style RO I have. RO 30 or RO 50. It is installed in the basement and has a blue pressure tank. It is plumbed to two sinks and two ice makers


The numbers 30 or 50 indicate the gallons produced by the membrane in 24hrs. If replacing the membrane I would go with the 50gpd membrane. Especially feeding that many locations. The higher producing membrane will supply quicker recovery of RO water used.
RJH2O

Jun 24, 2011 | Culligan Compatible RO Prefilter AC30AC15...

1 Answer

Have a 2004 culligan ro not sure on the model but has 3 long filters. Anyway product water production is way down. So i replaced the the 3 filters/membrane. Then cleaned the drain flow restrictor. Product...


Did you replace the R.O. membrane as will as the carbon and sediment filters. If your water is very hard or you have a lot of usage the membrane could be clogging up as they use a 3-5 micron filter.I would also check pressure in your tank and set it around 5 to 7 p.s.i.Hope this helps you. Thanks

Jan 15, 2011 | Culligan Under Sink Water Filter

1 Answer

How to sanitize ac30 culligan RO sytem?


It helps to sanitize the RO system each time you change the filters. Always test the RO water with a TDS meter to determine if the TDS rejection has dropped below 80% rejection. If it has the membrane should be changed along with the other filters. Always wear latex gloves when changing RO filters to prevent bacterial contamination. There are complete instructions on sanitizing the RO in the Culligan manual. Here is the link for the AC30 Manual.
http://www.freshwatersystems.com/support/AC-30.pdf

RJ

Dec 31, 2009 | Culligan Under Sink Water Filter

1 Answer

How do you change the filters in a Culligan RO system


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.

Dec 30, 2009 | Culligan Under Sink Water Filter

1 Answer

I HAVE A RO WATER FILTRATION MY PROBLEM IS I CANNOT GET WATER FLOW TO THE WATER STORAGE TANK ALSO I JUST CHANGED THE MEMBRANE FILTER


There may be several causes for this. Here is a list of things to look for.
1. If an activated carbon filter was installed many times carbon fines will plug up the head of the RO housing. Pull the filters out and flush the whole assembly with NO filters in it.
2. The capillary tube (which puts back pressure on the membrane to create water) may be worn out and all the water will run to the drain. Replace capillary tube
3. The automatic shutoff may not be opening to allow for water flow.
4. Shut the water off at RO tank and take the line off from RO filters to see if any water is flowing from housings.
5. The RO tank may also need air. If the air charge is low in tank (7 psi for 3 gal tank) no water can be forced from the tank.
6. If the RO is fed by a piercing valve make sure their is water coming from it.
7. Depending on what type of RO it is their may be a flow restrictor in head of membrane housing that can get plugged also.
I hope these tips may help you,
RJ

Oct 11, 2009 | Culligan Under Sink Water Filter

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