> It's in addition to previous message. > I confused ETK description. > > It says "Water hose(shutoff valve > heat exchanger)" > > So, it is basically peace of water pipe? What is this plastic screw-like on > top? Yes, and that screw is for bleeding air out when refilling. -- Huw Powell http://www.humanspeakers.com/audi http://www.humanthoughts.org/