The answer to 'why is my pressure regulator rusty water' is that a rusty pressure regulator is often caused by mineral buildup or corrosion within the regulator itself. Over time, the internal components can become clogged or worn down, leading to discolored, sediment-filled water coming out of the regulator.
Some common symptoms of a rusty pressure regulator include low water pressure, strange noises coming from the plumbing, and water that has a reddish-brown tint. If left unchecked, a rusty pressure regulator can eventually fail completely, causing major leaks or even bursting.