- moscow on thames
been there......I drain mine now every time. Mine actually split the casing
I read somewhere about a guy that built a small outside cupboard for his pressure washer, it was insulated with the tap inside and had a small bulb inside working off a frost stat. He reckoned that produced enough heat to keep off a freeze, I suppose it saves draining it down/packing it away and its available to use at all times.