Sewer Jetting: Keep People Out of the Pressure Path

Know the hazard

Team: Water, Sewer & Treatment. Topic: Equipment Safety.

A sewer jetter can make a blocked line look like an ordinary hose job. Its pressure and moving nozzle make it a different kind of work. A failed hose, unexpected nozzle withdrawal, or uncontrolled movement can injure people well away from the operator. Small punctures from pressurized fluid can be serious injuries even when the outside wound looks minor. Do not handle an energized leak or reach toward the nozzle to correct its position.

Use the controls

Only trained operators use the jetter under the equipment-specific instructions. Before work, inspect hoses, fittings, controls, and protective devices using the manufacturer's criteria. Plan hose routing, communication, the work boundary, and safe depressurization. Keep traffic, pedestrians, and coworkers clear of the operating area. Do not repair damage with tape, substitute unknown fittings, or change equipment while pressure remains. Stop if the hose route or operator visibility no longer matches the plan.

Work within the safe plan

If a blockage changes the operation, reassess rather than increasing force by habit. Coordinate before anyone approaches the line or handles connected equipment. Shutdown, isolation, and verified pressure release precede permitted maintenance. Report any suspected injection injury immediately and obtain urgent medical assessment, telling responders that high-pressure fluid was involved. Cleaning a line successfully includes keeping pressure contained, protecting people at the opening, and recognizing when the task requires a different method.

Discuss with the crew

A pinhole sprays from the hose and someone proposes wrapping it while the truck keeps working.

Question: What should happen?
Answer guidance: Stop the operation, keep people clear, and have trained personnel isolate and depressurize before evaluation.

Question: Why report a tiny puncture immediately?
Answer guidance: High-pressure injection can cause serious internal injury and needs urgent assessment.

Prepare, act, and follow up

Leader preparation: Bring the jetter manual and an out-of-service hose for inspection.

Put it into practice: Identify rejection signs on the training hose and rehearse the operator stop signal.

Supervisor follow-up: Verify hose inspection records and manufacturer-approved replacement components.

Official reference: OSHA: Control of Hazardous Energy
https://www.osha.gov/laws-regs/regulations/standardnumber/1910/1910.147

Awareness briefing. Apply current site procedures and applicable requirements. This talk does not replace required qualification, practical training, exposure assessment, medical evaluation, or a written program.

Suggested session: 5-7 minutes, including discussion and activity. Prepared October 18, 2026; recheck current requirements before use.

Show the crew

Identify rejection signs on the training hose and rehearse the operator stop signal.