What are the grounding requirements for the hoses on this equipment?

Use only static dissipation type hoses with a maximum of 300 ft (91 m) combined hose length to ensure grounding continuity. Check the electrical resistance of hoses regularly, and if total resistance to ground exceeds 29 megohms, replace the hose immediately. (Pages 21, 42)

From the official Graco Tranzitions XP Proportioner manual, page 21

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