Hi @Marleykj74,
A warm welcome to the Bunnings Workshop community and thank you for your question.
It seems likely that the hose is the issue. You should pick up a new hose that is suitably long and requires no joint between the tap and your pressure washer. Please have a look through our range of Hoses, there are plenty of options.
With your new hose, you'll need to ensure there is enough water flowing through the hose for the pressure washer to kick in. This will mean turning your tap to more than half its potential pressure.
Let me know if you have any further questions.
Jacob
