I have a 2nd pump which has recently stopped working properly. Symptoms are 1) usually loses pressure quickly and the pump gets louder 2) no pressure at all. We can fix it by either changing the mixer tap on the shower to cold, then back to hot or by giving the hot feed pipe to the pump a shake (#3 in the picture). I'm wondering if the issue is a missing Essex flange on the pipe coming out of the tank (#2) or the way the plumber has connected this pump to the existing bath pump (#2). Plumber wants to replace the pump but since it generally works, I'm not sure that'll fix the issue. Any advice appreciated!
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