Water leaking from Heliocol panel headers or manifold connections on the roof during pump operation.

Safety first: Turn off the pump and allow the system to depressurize before working on roof plumbing. Use fall protection and avoid stepping directly on panels.

• Identify leak location: Observe the array while the pump is running to pinpoint the exact header or coupling that is leaking.
• Tighten clamps: For Heliocol panel-to-panel couplings, gently tighten the stainless-steel clamps evenly. Do not overtighten, as this can crack the manifold.
• Inspect O-rings: Disassemble the leaking coupling, inspect the O-rings for flattening, cracks, or cuts, and replace with Heliocol-specified O-rings if needed. Lubricate lightly with silicone-based lubricant.
• Check for cracks: Examine the manifold for visible cracks or splits, especially after freeze events. Replace the affected panel if the manifold is damaged.
• Pressure test: Restart the pump and verify that the leak has been eliminated.