The gas inlet did not fit the orange gas pipe but manage to take a inlet of a old regulater to fit onto the heater turned heater on gets real hot neon temp reading works well got it up to 75c burning hot water,however the flow from pump
is set at 4 l.p.m to keep heater working but not set pressure screw at heater water inlet yet to dark now as I said have 2 L-5 heaters I would say the 8-L is better but the unit feels fragile,the hot water outlet could break if overtightend,no fittings come with this unit but 2 batteries did as for hot water output much better than L-5