Dosing and dilution system
Plumbing that removes the dilution decision from the person holding the bottle — which a regulator treats as a control on exposure, not a convenience.
In detail
A wall-mounted or in-machine unit that draws concentrate and water in a fixed ratio and delivers ready-to-use solution. A safety regulator lists it under CONTROL PROCEDURES alongside ventilation and substitution, which is the framing worth noticing: it is not there to save money on concentrate, it is there because a person mixing by eye is a person who will sometimes make a solution far stronger than the label allows, and will handle concentrate to do it. Two hazards close at once. The exposure hazard is contact with undiluted product, which is where the burns and the dermatitis in this trade come from. The cleaning hazard is over-concentration, which leaves residue, attracts soil, and produces the rapid re-soiling that gets blamed on traffic. The same device fixes both, and the regulator pairs it with the requirement that every container is labelled, kept lidded, and never refilled once empty. A household has no equivalent and does not need one. It has the same problem, though, and the domestic answer is a measuring spoon and the discipline to use it.
Why
Sources for this page
Sources
Cleaning accommodation and facilities: COSHH essentials, control approach 1
Health and Safety Executive (HSE), United Kingdom · Government or regulator
Relied on for: That control procedures include providing equipment with auto-dosing and cleaning-in-place and providing automated dispensing systems, that containers must be clearly labelled and kept lidded, that empty containers are never reused, and that health effects of cleaning chemicals include irritation, burns and dermatitis from skin contact. (states this directly)
Verification: a person has read the passage relied on.
Read on — The hazards list, the control procedures, PPE, skin care and the schedule. Supports the claim as stated. Supplies the professional pillar's spine. Everything a household reader does is chemistry and technique; what a regulator adds is dosing control, colour coding, substitution, ventilation rates and a written schedule — none of which this register held, and all of which are the actual difference between cleaning and being paid to clean. It also puts the never-mix rule in a regulator's words for the first time.
Last reviewed by a person on .