Best advice is insulate tank, hoses, change single layer pole hose for twin layer and change any small 'Y' connectors on the pole hose for larger ones to minimise the water freezing at the brush. Don't leave wf poles lying on the ground outside when not in use on very cold mornings, they freeze quickly. Try to keep pump continuously running even when reeling hose back in so the water isn't stood still long enough to freeze if using cold water.