If you experience a sudden reduction in water pressure, it's a good idea to check with the water company. There may be a temporary problem with the municipal system, and if you adjust your valve and the municipal problem is corrected, your pressure will be too high.

Don't set the pressure much greater than 60 psi. Not only does high pressure cause leaks, it wastes water and can actually be dangerous.

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If you didn't have a pressure-reducing valve installed between the municipal water system and your house, the water pressure would break all your water lines and appliances. The pressure in a municipal system can be as much as 200 psi to service fire hydrants and high-rise buildings, but the pressure in a typical residence is usually around 50 psi. The step-down regulator near your water meter or just outside the house is usually factory-set. If you need to adjust it higher or lower, the procedure is simple, but you may need a water pressure meter if there isn't one there already.