Pump housing or plumbing is leaking at the unions connected to a Pentair IntelliFlo or SuperFlo VS pump.

Safety first: Turn off pump and relieve system pressure before loosening unions.

• Step 1 – Tighten unions: Hand‑tighten the suction and discharge union nuts. Do not use large wrenches that can crack the fittings.
• Step 2 – Inspect O‑rings: If leaking persists, shut off valves, loosen unions, and inspect the O‑rings. Replace flattened, cracked, or missing O‑rings with Pentair‑specified replacements and apply a light coat of silicone lube.
• Step 3 – Check alignment: Ensure the connected PVC plumbing is properly aligned and not forcing the unions off‑center. Correct any misalignment with additional fittings or supports.
• Step 4 – Replace cracked unions: If the union body is cracked, replace the union kit designed for your Pentair pump model.