Can you use other tabling charts for pipe sizing when using Flowpex for gas connections?
No. Flowpex gas sizing tables are included in our Flowpex Installation manual. They are specific to the Flowpex system. The reason for the difference in sizing between Flowpex and copper is in the fact that the Flowpex fittings are internal as opposed to external for copper. However, Flowpex has less co-efficient of friction than copper with improved lamina gas flow and no boundary effect, meaning apart from the fitting restrictions, the Flowpex pipe when tested was found to be far superior to copper with no measurable pressure drop over 50 metres.
