Mains water pressure - what is allowable ?

Hi All, We are suffering from high mains water pressure to our house - things like water hammer, bursting garden hoses, solenoid valves on appliances failing prematurely, taps hard to turn off etc. I would like to know if there is a permissable range of pressure that the water supplier (SA water) should be providing. I have checked their website, but I couldn't find any specs. The basis for this question is whether I will need to get a plumber in to install a pressure reduction device, or can I get SA water to do something about it. Regards, James


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