Given that such things are remarkably twitchy about water pressure, shutting off at the first hint of trouble, I wonder if your hand was lower down than the shower head in normal use, or if or does not work when something else on site, like a washing machine or dish washer, is also running. Given that pressure, flow and temperature are related, it could be that it works OK for a tepid shower but not a hot one, or on some settings of a multi-hole nozzle and not others.
Given that such things are remarkably twitchy about water pressure, shutting off at the first hint of trouble, I wonder if your hand was lower down than the shower head in normal use, or if or does not work when something else on site, like a washing machine or dish washer, is also running. Given that pressure, flow and temperature are related, it could be that it works OK for a tepid shower but not a hot one, or on some settings of a multi-hole nozzle and not others.
