Our range of Interpump motor pump unit pressure washers uses a motor to power a high-pressure pump. We can offer pumps with water flows from 1 lpm to 188 lpm and pressures of 70 - 600 Bar. Interpump pressure washers are commonly used for heavy-duty cleaning in industrial sectors where heavy use, water flow, and pressure are needed to clean. If the unit does not have one, trapped pressure and zero pressure unloader valves can be purchased separately. They are available in various sizes and power capacities, so choosing the right one for your needs is essential. Choosing the correct jet/nozzle size is also essential when pairing up a pump with a lance jet. Feel free to contact us to calculate the proper size for your pump. Our pump units do not have starter / on-off switches, nor do they come with hoses or accessories; these need to be purchased separately.