Simple leaks are one thing, but recurring or mysterious failures require systematic diagnosis. Step 1: Isolate the Failure Mode. Is it a consistent weep, a spray, or a sudden blow-out? Step 2: Inspect the Seal. Is the O-ring cut, swollen, hard, or flattened? This indicates chemical incompatibility, incorrect installation, or excessive temperature. Step 3: Check the Mating Surfaces. Look for scratches, pitting, or deformation on the adapter’s sealing gland and the coupler’s face. Step 4: Verify the Locking Mechanism. Are the cam arms worn, bent, or loose? Does the collar rotate freely? Step 5: Review System Conditions. Has the operating pressure or temperature spiked beyond ratings? Is there excessive vibration or side load on the connection? K&G’s Camlock Coupling technical support can often diagnose issues from photos. Common root causes we see are using the wrong seal material, improper cam arm engagement, and incompatible fluid conditions.