I have a 9.5Kw triton elec shower and have been concerned about the flow and temp adj. I have just measured the flow rate of my mains supply to the shower and it comes in at 6.5 - 7 litres per min, which to me seems too low, am i right ? I have been considering putting a single flow pump, the triton 450i, on the mains supply to boost the flow to my shower. Can i do this and would it work ?