Drain and Sewer Jetting
This module can be completed by the candidate within 3 years of the initial safety awareness course being successfully completed. There is both classroom and a strong practical content to this module.
At the end of the course there is a multiple choice questionnaire. The candidate has to pass this questionnaire and to successfully undertake the practical side of the course before a certificate can be issued. The module details can then be added to the candidate's Identity/medical card. For course details please see the attached course itinerary.
A copy of the certificate issued by the Water Jetting Association that is awarded to successful candidates that pass the practical test and have completed the questionnaire. This certificate only has to be taken once, and it remains valid as long as a valid Safety Awareness Certificate is in force.
WJA – DRAIN & SEWER CLEANING COURSE - CONTENT SUMMARY
1 REGISTRATION & INTRODUCTION
2 REVIEW KEY SAFETY AWARENESS ISSUES (include only when presented as a ‘Stand-Alone' Course). Nozzles & jets - pumps & ancillaries - pressure controls - water jetting hose - hazards & injuries - PPE - operational procedures.
3 APPLICATIONS & MACHINES:
Scope of drain & sewer cleaning applications; other pipeline systems. Range of cleaning requirements and standards. Range of jetting machines suitable for drain & sewer cleaning.
4 JETTING EQUIPMENT – NOZZLES & ANCILLARIES:
Review nozzle principles – fixed jet nozzles, rotating nozzles, life & wear characteristics, driven rotating nozzles, associated ancillary equipment.
5 JETTING EQUIPMENT - WATER JETTING HOSE:
Hose used in drain & sewer applications, damage & wear possibilities, hose ancillaries. Bore size & flow capabilities.
6 JETTING EQUIPMENT – MACHINES:
Range of jetting machines used - engine controls & instruments. Pump pressure controls, review dump / dry shut & selector / fail safe types, pressure safety relief. Water supply / delivery features – filtration requirements, boost feed pumps, built-in anti freeze provisions.
7 JOB ASSESSMENT & PLANNING:
Information & assessment – site location, access to & layout of pipeline; construction material & nature of contaminants – initial condition and required finished condition; water provision, waste disposal, hazards. Selection of equipment & manning levels – jetting machine / nozzles / accessories, number and duties of operators; single person operation. Determine job method, based on safe system of work.
8 OPERATIONAL PROCEDURES:
Daily checks – manufacturer's instructions, other items requiring regular checks.
Setting up – permits / authorisations, barriers & warning signs, positioning of machine & equipment, team duties & signals, flushing, leaks check, preparation for entry of nozzle.
Nozzle entry & advance into pipe; control & monitoring during cleaning, debris extraction, standard of finish. Release of hose if trapped by debris; removal of nozzle on completion.
Job completion – client inspection, waste removal, equipment decontamination, return site to safe condition.
9 PRACTICAL EXERCISES:
Jetting machine & equipment – review features, and demonstrate daily checks, start / run / stop.
Job assessment – review & discuss, site location & constraints, accessibility, pipeline layout & features.
Pipe construction, nature of contamination, required finishing condition. Water supply - effluent drainage & waste disposal. Hazards & use of PPE. Discussion of options, agree job method.
Site preparation – setting up work area. Team talk – review job method, signals, set up team(s). Positioning of jetting machine, layout & check equipment.
Demonstrate all procedures to full group. For all teams, instruct each operator in each duty.
Trainees carry out exercise - each team following instructions to set up, flush, check for leaks, prep for nozzle entry, proceed with operation. Rotate team members through duties. Review at each rotation and final review. Disconnect equipment & clear site.
Review of course content as above, with opportunity for further discussion prior to questionnaire.
The Water Jetting Association © 2014