My elderly parents had this shower fitted as part of a disability bathroom. It is running from the mains but it shows "Low Pressure" if any other water is running in the house. Occasionally it shows "Low Pressure" even when nothing else is running.
I think a pump might sort out the problem for them but I wonder if it is possible/safe to fit and if it could sort out this problem?
I was looking at the TRITON T450I SINGLE-IMPELLER PUMP.
no you can't it is illegal to install a pump on the mains supply.
and this pump is not suitable for mains connection.
if you install a pump to an electric shower it must be from a tank not mains.
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Try fixfault.com to fix baths and showers.