I do not use a regulator at all. Has worked for me for about 20 years. I have been in several parks that warn of high pressure. One that stated close to 100 lbs. I have a sediment filter, then a water softner and then a charcoal filter. This is what regulates the pressure. I also do periodic checks of rhe joints. The pex piping is tested and rated to 300 lbs. Joints are the weak points.
Bill
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