Not like water piping, In case the conduit would be to be watertight, The theory is to keep drinking water out, not in. In this case, gaskets are used with special fittings, including the weatherhead foremost in the overhead electrical mains to the electrical meter. The Roxtec BG™ B and https://lukasfthwj.widblog.com/84294347/mini-trunking-things-to-know-before-you-buy