A farm washer spends most of the year doing very little. Then it works flat out for two weeks, and those two weeks are not negotiable. Grain store before harvest. Livestock sheds between batches. Sprayers, trailers and machinery before they go away.
A valeting bay earns by the vehicle. Every machine hour turns into cars through the bay, and every idle hour does not. That makes a wash bay machine different from a yard machine. It runs long, it runs hot, and it runs with chemicals through it all day. Those three things decide how it wears, and they decide what a service has to cover.
Milton Keynes runs on vehicles. Vans, tippers, plant, refuse trucks, and trailers move between sheds on the grid roads all day. Every one of them gets washed. So a fair number of pressure washers work hard here, and they work hard every week of the year.
The heating coil is the most expensive part of a hot water machine. It is also the part you never see. It sits inside the machine as a long steel tube wrapped in a spiral. Water goes in cold and comes out hot. Nothing about it looks like a wearing part, so nobody treats it as one.
