Just a fly lead; ST recommend a double pole switched, fused connection but you can still throw the switch. None of the pumps are rated more than 13 Amps (2/3 bar pumps are only 5 Amps) so there is no reason you should not fit your own plug with a suitably rated fuse if you wish.
Go for the 3 bar if you have the cash, won't do any harm & will give you a very good reserve & at least get some sort of performance from the high pressure shower head you’ve got.
hi richard, just to throw a spanner in the works, what are your opinions on pressurised hot water systems? a friend of mine has just suggested, as an option instead of a noisy pump, to put a mains fed pressurised vessel in the system to give my hot water a mains header pressure.
I don’t have any personal experience with Megaflow systems but it’s going to be a rather expensive option. It’s not something you can really install/maintain yourself as there are safety implications over a low pressure vented system. The existing pipework must be tested for integrity & depending on its age/condition you may end up replacing most of it. The stability of your incoming mains supply is also a determining factor; pressure can fluctuate considerably depending on demand & local conditions & this will determine the performance of your system.
You really need to take local advice & get some quotes but it ain't gonna be cheap.
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