Section 20-6. Recoil force and body support in connection with high pressure jetting

Several hand-held jetting devices may not be connected to the same pump where opening or closing the relief valves can produce dangerous changes in the recoil force.
Consideration shall be given to the recoil force's effect on the operator when using a hand-held jetting device.
When the jetting device is supported by the body, the recoil force shall be partly or wholly absorbed by the body.
The surface on which the operator stands shall be sufficiently slip resistant for work using a jetting device, and the operator shall be able to withstand changes in the recoil force from the jetting device during use.
Guard rails shall be used as necessary where work with a jetting device involves a risk of falling, to ensure that the operator can work safely despite the horizontal recoil force.