I knackered my pressure washer by leaving it in an unheated garage.
It must have had some water left in it and the frost split a plastic piece, where the water comes out of the pump.
I take the feed hose off the back of the reel, pull a couple of meters of hose off the reel itself, and insert a male rectus fitting into the end. it then drains itself by syphoning. The pump and Varistream are housed in their own box, I just bring this into the coservatory. And you have reminded me to go and do it before it gets dark.