DIYbanter - View Single Post - increasing water pressure blew up water softener

wrote:
Are we
supposed to monitor the water pressure at all times ?

No; you're supposed to fit a pressure reducing valve with a downstream
pressure relief valve to protect anything that might be damaged by high
pressure.

Although they may have measured the water pressure at installation
during the day, the maximum occurs during the night when there is
little consumption and so less pressure lost due to friction between
pump and outlets.

If the device maximum rated pressure is less than the water authority's
statutory maximum, it's down to you or the installer (can we guess what
their response will be? ). Just putting in an insurance claim might be
the path of least grief.