hozelock connector from pump to heater, red washing machine hose from heater to hoze reel, this is jubilee clipped onto a professional spinning coupling I got from a pressure washing outlet which allows the reel to spin freely without any leaks, don't put normal hose or plastic, brass hoze locks on the hot coming out as they tend to warp and blow off after a while, the washing machine ones work a treat.
hope this helps
Graham