When working at top, all the time change instruments in secure areas the place there is not a risk of letting the tools fall, and don’t use tools with out attaching them to a work belt when working at top. http://[email protected]/suivi_forum/?a%5B%5D=%3Ca+href%3Dhttps%3A%2F%2Fwww.webwiki.com%2F%3Eplumbing+services%3C%copyright%3E%3Cmeta+http-equiv%3Drefresh+content%3D0%3Burl%3Dhttps%3A%2F%2Fwww.northwestu.edu%2F%3FURL%3Dhttps%3A%2F%2Fmayfairemergencyplumber.co.uk+%2F%3E