Pump leaks at the threaded or union connections on the suction or discharge ports.

Turn off power and relieve system pressure before loosening any unions.

Steps to check:

• Tighten unions: Hand-tighten the DAB pump unions, then use a strap wrench if needed. Do not overtighten plastic fittings.
• Inspect O-rings: Disassemble unions and check O-rings for cuts or flattening. Replace with DAB-specified sizes.
• Check for cracks: Examine the pump housing ports for hairline cracks. If cracked, the housing must be replaced.
• Reassemble with care: Use appropriate PTFE tape or thread sealant on threaded fittings, avoiding over-wrapping, which can crack plastic.