EZ-FLO Black Tubing (5')

Understanding which tubing goes where is essential for proper EZ-FLO setup and maintenance.

The EZ-FLO fertilizer injector uses two separate pieces of 1/4" poly tubing to route water and fertilizer solution through the tank:

Black Tubing (This Product) — Inlet Side:
Connects the mainline water supply to the blue connector nut on the EZ-FLO cap. Water flows in through this tube, passes through the fertilizer tank, picks up the fertilizer solution, and exits via the outlet side. The opaque black material blocks sunlight to help prevent algae buildup.

Clear Tubing (Sold Separately) — Outlet Side:
Connects the green outlet on the EZ-FLO cap back into your irrigation mainline. This tube carries the fertilizer-enriched water from the tank into your drip system for distribution to your plants. The EZ-FLO Clear Tubing (5') is available separately.

When replacing tubing, always inspect both the inlet (black) and outlet (clear) lines. If one is worn or cracked, it is good practice to replace both at the same time.

Follow these steps to replace the black inlet tubing on your EZ-FLO fertilizer injector.

Step 1: Turn Off the Water Supply
Close your hose bib or shut off the irrigation system before beginning. Relieve any remaining pressure in the lines.

Step 2: Disconnect the Old Black Tubing
Locate the blue connector nut on the EZ-FLO cap. Carefully unscrew or pull the old black tubing free from the fitting. Inspect the connector nut for any cracks or damage.

Step 3: Cut the New Tubing to Length
Using a clean, straight cut, trim the new black tubing from this 5' roll to the length required to reach from your mainline tap point to the blue connector nut on the EZ-FLO cap. A straight cut ensures a leak-free connection.

Step 4: Connect the New Tubing
Push or thread the new black tubing firmly onto the blue connector nut fitting on the EZ-FLO cap. Connect the other end to your mainline barb or saddle fitting as required by your system.

Step 5: Test for Leaks
Slowly turn the water back on and check all connection points for drips or leaks before resuming normal fertigation operation.

What is the difference between the black and clear EZ-FLO tubing?
The black tubing is the inlet line — it carries fresh water from your mainline into the EZ-FLO tank and connects to the blue connector nut on the EZ-FLO cap. The clear tubing is the outlet line — it carries the fertilizer-enriched solution from the tank back out to your irrigation line and connects to the green outlet on the EZ-FLO cap.

Using the wrong tubing on the wrong port will cause your injector to not function correctly. Always connect black tubing to the blue (inlet) fitting and clear tubing to the green (outlet) fitting.

Why is the inlet tubing black instead of clear?
The black color blocks sunlight from entering the tubing, which prevents algae from growing inside the line.

Algae growth inside tubing can cause partial or complete clogs over time. Using opaque black tubing on the water-side inlet is a simple and effective way to maintain flow and extend tubing life.

Is 5 feet of tubing enough to replace my EZ-FLO inlet line?
For most standard hose-bib EZ-FLO installations, where the injector tank sits on the ground near the faucet, 5 feet is sufficient to reach from the mainline saddle fitting to the blue connector nut on the cap.

If your setup requires a longer run, simply order two rolls. Avoid excessively long tubing runs, as this can add unnecessary resistance and reduce injector performance.

Do I need to replace both the black and clear tubing at the same time?
You don't have to, but it is recommended. If one piece of tubing is cracked, kinked, or worn, the other piece is likely at a similar stage of wear. Replacing both at the same time reduces the chance of a second failure shortly after.

Pick up the EZ-FLO Clear Tubing (5') alongside this black inlet tubing to complete a full tubing replacement in one step.