It is not recommended to use bleach in a pressure washer as it can damage the internal components and seals. Bleach can also be harmful if sprayed onto plants or vegetation. It is best to use cleaning solutions specifically designed for pressure washers.
No. Typically a gas pressure washer will use less water volume than if you turned your garden hose on full blast. The pressure washer does not depend upon water pressure, but it does need decent volume so be sure to turn your hose faucet to full open once connected.Normal house line pressure of 45-50gpm should work for most residential size pressure washers.A simple test would be to track the time it takes for your garden hose to fill a 2 gallon pail when opened fully vs the same time it would take to fill the bucket with your pressure washer. OK, maybe that second test is not so easy as the pressure will keep knocking the bucket over. Be safe now.
Water.
yes you can
Water pressure is typically higher than air pressure, so it can cause a silicon radiator hose to burst more easily. Additionally, water can cause the hose to deteriorate faster due to its properties and the pressure exerted on the hose. It's essential to ensure that the hose is rated for the highest expected pressure in the cooling system to prevent bursting.
I would use a pressure washer.
Usually the easiest place to buy a pressure washer for use on a trailer would be on auction sites. There are also sites that are specially made for buying things like pressure washers for trailers.
Water pressure from a garden hose is sufficient.
If you use a pressure washer like the 'Karcher K2' which has a 110bar pressure you can safely use it on your car, but I wouldn't use it at close range. There are plenty of other items that can be cleaned this way, i.e; patio, decking, bicycles, garden furniture and windows.
With a power washer and a little patience.
You can put it in the washing machine, but this may not be effective. Your best bet is to take it outside and use a hose or a low-pressure washer. You can also scrub it off with a toothbrush; that is always my method.
As with any other tool, a pressure washer can get clogged and needs regular maintenance such as replacing hoses and other parts where everyday use will cause breakdown.