The most important equipment needed in a dog grooming van is a grooming table, a wash tub with a water supply and storage tank, and a power generator. Basic supplies such as pet clippers, combs and brushes, and shampoos and conditioners are also essential for a mobile dog groomer.
Additional items that are useful to make the grooming process and clean-up easier include a table with harnesses that keep the dogs from pulling away or biting, a clipper with an attached vacuum that sucks up the hair as it cuts, and a pet hair dryer instead of towels to save time in grooming as well as in clean-up. A mobile grooming van also needs adequate lighting so the groomer can keep a sharp eye on what she's doing, and storage space to hold supplies in place while the van is in motion.
Different sizes of dogs have different requirements; This affects the choice of tub and table. A large dog may be too heavy to lift, but a tub with a door allows it to walk in on its own. Likewise, bending down for a small dog can be hard on the back, so a table that raises and lowers can be helpful.