Aquatic Connection RO and RODI System
Installation and Operating Instructions

 Congratulations! Your reef will thank you for providing excellent water quality from now on. Reverse Osmosis Systems are very easy to install, but if you have any further questions, you can call or email Aquatic Connection. Our phone number is 954-747-8511 or email

Before you install it, make sure there are no visible signs of damage from shipping. The clear containers (sumps) should be screwed on snugly, and all tubing should be inserted into each fitting. Make sure the tubing is not kinked. The RO unit may be mounted on either side of a sink, underneith a sink, in the back of a cabinet, in the basement, or even outside.


Please read these instructions carefully before using the RO System. It is the responsibility of the purchaser to insure that the unit is installed to adhere to all local plumbing codes.

Filters need to be changed every 6 months to maintain high quality water. If your water source is of questionable quality, it may be good to change filters every 3 to 4 months for the highest quality water delivery.

How do you set up an RO or RODI System?
In a nutshell, you supply water to an RO or RO/DI system through the cold water supply using either a self piercing saddle valve or a hose bib adapter. The system will create RO water which should be perfect for clean aquarium water. The unit will also put off approximately 4 times the amount of waste water, so for every one gallon of RO water produced, it will make 4 gallons of waste water. The waste water will come out through a Black line attached to the system. The Black waste line can be dumped into the undersink drain using a saddle clamp or the black line can be sitting in the sink or can be placed just about anywhere you can put water.

How does an RO or RODI System work?
They work by passing water under pressure through a semi permeable membrane or thin plastic film. The pure water molecules pass through and the wastes stay behind being flushed away to the drain. After RO System the water is 90-98% pure, depending on the size and type of system.

Want even purer water?
Then pass it through a DI unit (hence the name RODI) which attracts anything that is left in the water, so you have ultra pure water.

So Let's begin the installation!

1. Your System has Color Coded Lines:

The red tube is the line that supplies water to the RO unit, called the supply line.

The black tube is the drain line for waste water. Simply place this tube in a sink or down a drain and allow the water to flow freely.

The blue tube is your good RO water minus the contaminents. Great for drinking, aquariums, and ????

2. The RED Supply Feed

Feed water can be obtained from a kitchen (under the sink), a restroom, a faucet, or from a regular feed pipe available out of the wall or outside the building. First, locate the water shut-off valve for the cold water feed line you choose to use for the supply. Accidentally hooking up the system to the hot supply line will permanently damage the membrane of the ro system. To assure you are unsing the cold water line, turn on both, the hot and cold facet. After the water is warm to the touch, feel the pipes under the sink. It will be easy to identify the hot and cold pipes.

Close the cold water valve. Turn the cold water faucet just to be sure that the line is completely shut off and the line is drained. If no shut off valve is located under the sink, or if the water continues to come out of the faucet, turn off the main supply at the entry to the location.Solid copper pipe or PVC: Select a straight portion of pipe to install the self piercing valve.

Installing the self piercing valve:

Assembe the valve as shown. Be careful to have the rubber piece in place in order to avoid water leakage. Turn clockwise the hand valve to make a small hole in the pipe.

Connecting the red tubing to the saddle piercing clamp requires using the nut and ferrule included. Seat the tubing in the fitting completely, slide the ferrule down until it makes contact, then tighten the brass nut. Tighten it well using pliers, as this is a compression fitting. Now that the red tubing is securely connected, open the T fully to allow water to flow to the RO/DI system. If you ever need to turn off the water, simply tighten this valve down completely again.

Now that the system is plumbed to a water source, you can turn it on. The first hour's worth of pure water should not be used, because it contains the food-grade perservative in the membrane. After 5g of RO water have been made and poured down the drain, it is ready to be used.

Optional Hose bib connection:
If you prefer, you can order our optional Hose Bib Connector (also should be able to find at Home Depot and Loe's), that will connect your system to either your washing machine or garden hose outside of the house. It uses, a ¾" female threaded connection can be screwed on to the hose bib, and the red tubing inserted into the fitting. Turn on the water supply and your RO/DI will begin to fill up. To share your washing machine water supply, buy a brass "Y" fitting from your local hardware store to create two connections - one for your washing machine, one for your RO/DI. Only use the COLD WATER connection.

2. The BLACK Drain Line for waste water

The Black line coming out of the unit is the drain line for the waste water that includes all the contaminents the unit passes out. Do not be surprised that there is roughly 3 to 4 times the waste water than good RO water. That means for every 1 gallon of RO water, the unit will be draining 3 to 4 gallons of waste water. If your RO system is being installed in a basement sink or a place accessable to a drain, just have the black line sit in the drain. If your RO system is being installed underneith a sink, you may want to install the drain line actually into the drain pipe. We do this using an item called a drain saddle clamp.

IMPORTANT! The reverse osmosis unit cannot work properly if the black waste water line cannot flow freely during operation.

Installing a drain saddle clamp:
• A Drain Saddle is used to make a waste water connection with your drain if you are installing your unit under the sink. This is designed to fit around a standard 1-1/2" OD drainpipe. The drain saddle valve should always be installed before (above) the p-trap and on the vertical or horizontal tailpiece. Do not install the drain saddle near a garbage disposal to avoid clogging the drain line with debris. Depending on the system you purchased, you may or may not have a drain saddle clamp included. If you would like a drain saddle clamp for your unit you may order one from Aquatic Connection.

This is what a drain saddle clamp should look like on your drain pipe. Though hard to see, the 1/4" tubing should barely be inside the pipe so as not to snag anything (hair, etc) going down the sink's drain.

The final BLUE LINE is your pure RO water. The unit will fill up with water. When you make RO or RO/DI water, for every gallon you make through your RO Water BLUE TUBE, you’ll waste 3 TO 4 gallons of water our of the Black tube. This 4:1 ratio is normal, assuming you have average tepid water temperature and good water pressure.

To test the output water’s quality, a TDS meter is a great tool.

If you would like, you can order our optional TDS meter. The TDS meter is an important tool if you are using a reverse osmosis system for making saltwater and for RO water for top off water. Otherwise you will not know if your RO System is working correctly. With a TDS Meter you will test TDS (Total Dissolved Solids) levels of water anywhere, anytime! The goal is "0". Testing the TDS of the RO water will provide the information as to when the filters need to be replaced.

Limited Warranty
Aquatic Connection makes no claim to the suitability of this product for any specific use. The end user is solely responsible for determining fitness for a particular use, and for installation. This product is sold as a component of a custom aquarium installation.

Your product is warranteed to be free of defects for a period of one year from purchase. We will, at our discretion, repair or replace your product at no charge during this period. Return shipping is the responsibility of the purchaser. This warranty does not cover accidental damage, misuse, improper care or alteration, or acts of God, such as floods and earthquakes. Coverage terminates if the original purchaser sells or otherwise transfers the product. This warranty excludes claims for incidental or consequential damages, loss of revenue or profits, loss of business, or other financial loss in connection with the warranty problem. Some jurisdictions do not allow the exclusion of limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights, which vary from state to state or country to country.