NEWSDESK
New WJA course give drainage operatives dual skills
Drainage operatives are beginning to benefit froma new training course that helps develop essential knowledge and skills for when using water jetting for surface cleaning.
The Drain, Sewer and Surface Preparation practicalmodule, or DSP for short, developed by theWater Jetting Association (WJA), includes new instruction on surface preparation using water jetting guns.
It develops skills that discourage the use of washdown nozzles attached to jetting hoses, which have nomechanismfor instantly shutting off the water supply in an emergency.
WJA Training and Safety Committee Chairman SteveWilliams said: “We have developed this course in consultation with our drainage contractormembers so their operatives have the skills needed to deliver the best service for customers safely and effectively.
“Drainage operatives often use water jetting to clean contaminated surfaces, for example to deal with sewage spills, or clean access chambers and open channels.
“We want to eradicate the use of washdown nozzles for these tasks.Water jets fromguns can be instantly stopped by releasing the trigger. This provides a built-in safety mechanismto control water delivery.
“By adopting the DSP course, drainage contractors can align their operational procedures with theWJA’s red code of practice for the safe use of water jetting equipment in drains and sewers, which has just been updated, and which incorporates
68 this new thinking on surface preparation.”
During the DSPmodule, which has been accredited by City & Guilds, operatives undergo two practical assessments: water jetting in drains and sewer pipes; and jetting for surface preparation with a jetting gun up to 275 bar (4,000 psi) that an operative can comfortably control.
The pressure limit has been set because drainage operatives commonly use lower pressures for washdown activities. Operatives who need to carry out surface preparation tasks at higher pressuresmust pass the standardWJA surface preparation module.
Topics include safe use of jetting
equipment, water jetting techniques, jetting gun and nozzle types, risk assessment, use of protective clothing and equipment, site set-up, and emergency first aid.
Drainage operatives can still take the standard Drain and Sewer (DS) course, which does not have the surface preparation component.
Drainage operativesmust pass the class- basedWJA Safety Awareness course, which is also City & Guilds accredited, and either the DSP or the DS practicalmodule to receive theirWJA training card, whichmust be renewed every three years by attending the Safety Awareness Refresher course.
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| July 2023 |
www.draintraderltd.com
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