My house using Grundfos CM5-4PT. So awesome I tell you, water pressure 40psi maintained. I have a rain shower 16”x16” really like showering in the rain.

One thing before you install a pump, do check what type of water piping is installed in your house. If using the old grey PVC pipe which is connected with glue I would not recommend to install water pump. If your piping is using Hansen fittings then can install no problem as those piping connection is rated to hold over 100+ psi.