An extinguisher taken out of service is waste, and the cost of dealing with it is driven by what it contains and how it is handled rather than by its size. A duty holder disposing of one has the same waste duty of care as for any other commercial waste: classify it, keep it separate where it needs to be, hand it only to an authorised person, and keep the transfer documentation.
Why the contents drive the classification
An empty, depressurised steel cylinder is scrap metal. A charged unit is a pressure vessel and cannot go to a skip or a household site. Some agents, particularly older foams containing fluorinated compounds, are classified as hazardous waste and have to be consigned accordingly. Classification is the step that decides everything downstream, including the price.
What the process involves
A competent contractor depressurises the unit, separates the agent, and sends the shell for metal recycling. The agent is either recovered for reuse or treated as waste according to its classification. The labour in that sequence, plus the transport, is the bulk of what is being paid for.
Handing it to the right person
Waste may only be transferred to an authorised person, which in practice means a registered waste carrier, and the transfer has to be documented. Where the waste is hazardous, a consignment note is required. A skip on a building site is not a lawful destination for a charged extinguisher and a fly tipped one remains the producer's problem.
How it is usually charged in practice
Most buildings dispose of units through the firm that services them, as a line on the annual visit, which keeps the transport cost shared across the site. Standalone collections of one or two units cost more per unit for the obvious reason. Where a whole provision is being replaced, the disposal should be quoted with the replacement rather than after it.
Questions people ask about fire extinguisher disposal cost
Can a fire extinguisher go to a household recycling centre?
Commercial waste cannot in any event. Some sites accept small domestic units when fully discharged, and many do not accept pressurised vessels at all, so it has to be checked rather than assumed.
Does an empty extinguisher still need paperwork?
It is still commercial waste and the duty of care still applies, including a transfer note. The hazardous classification usually falls away once the agent has been removed.
Who is responsible if a contractor disposes of it badly?
The producer retains a duty of care and has to take reasonable steps to check the carrier is authorised and the destination is appropriate. Keeping the carrier registration and the transfer note is what those reasonable steps look like.