Replacement O-ring for EZ-FLO Caps

OEM Replacement O-Ring for EZ-FLO Fertilizer Injector Caps

Stop leaks before they start with this genuine Replacement O-Ring for EZ-FLO Caps (EZ-FLO part number K-LOR). This is the official seal that sits between the cap and the tank body on EZ-FLO hose-bib fertilizer injector units, and it is a critical component for maintaining a watertight connection. Over time, exposure to UV light, fertilizer chemicals, and seasonal temperature swings can cause the nitrile rubber o-ring to crack, harden, or flatten — leading to drips or a loss of pressure that throws off your injector’s feed rate. Replacing the o-ring is a fast, low-cost fix that restores your injector to like-new performance.

This o-ring is confirmed compatible with the EZ-FLO Rubber Cap (IEZCAPRUBE) and the EZ-FLO High-Density Cap (IEZCAPHIDT). It is the same large cap o-ring sold directly by EZ-FLO Injection Systems. If your injector cap is leaking at the tank connection or you are performing an end-of-season rebuild, keeping a spare on hand ensures you are never caught with a down system during peak watering season.

• Genuine OEM Part: Official EZ-FLO replacement o-ring (part no. K-LOR) — the same seal used in the original factory assembly for a guaranteed fit.
• Stops Cap Leaks: Restores the watertight seal between the EZ-FLO cap and tank body, eliminating drips that can undermine your fertilizer injection rate.
• Nitrile Rubber Construction: Nitrile (Buna-N) rubber resists the fertilizer solutions, oils, and temperature extremes encountered in an outdoor fertigation system.
• Broad Cap Compatibility: Designed for use with the EZ-FLO Rubber Cap (IEZCAPRUBE) and EZ-FLO High-Density Cap (IEZCAPHIDT).
• Easy DIY Maintenance: Swapping the o-ring requires no tools — remove the cap, seat the new o-ring in the groove, and hand-tighten the cap back onto the tank.
• Economical Repair: A fraction of the cost of a full cap replacement — keep a spare on your shelf so end-of-season maintenance is always ready to go.

Confirmed specifications for this replacement o-ring.

Restore a leak-free seal in just a few minutes — no tools required.

Step 1: Shut Off Water & Depressurize
Turn off your hose-bib or timer and allow any remaining water pressure in the EZ-FLO injector to bleed off completely before opening the tank.

Step 2: Remove the Cap
Unscrew the cap from the EZ-FLO tank by rotating it counterclockwise. Set the cap aside on a clean surface.

Step 3: Remove the Old O-Ring
Locate the o-ring seated in the groove on the underside of the cap or the top rim of the tank. Carefully remove it with your fingers — avoid using sharp tools that could scratch the seating surface.

Step 4: Inspect & Clean
Wipe the o-ring groove and the mating tank surface clean of any dirt, old fertilizer residue, or debris. Inspect the groove for cracks or damage.

Step 5: Seat the New O-Ring
Press the new IEZCAPOR o-ring evenly into the groove. Make sure it lies flat all the way around with no twisting or bunching.

Step 6: Reinstall the Cap
Thread the cap back onto the tank and hand-tighten firmly until snug. Do not over-tighten. Restore water flow and check around the cap joint for any remaining drips.