The Main Pressure Regulator

Raking leaves out from underneath the lanai I just happen to look up. The water line into the house is right there and can be seen through a opening I cut in the lattice to allow the main shutoff valve to be reached without crawling under the house. There are pretty little ferns growing on the water pressure regulator.

That is not good.

Household Water Pressure Rregulator
A leaking household pressure regulator… Another weekend repair required.

The regulator is weeping, a steady dripping from the bottom of the assembly. A closer look shows that the valve body is badly corroded. This is not something I want to mess with until I have replacement parts on-hand. It is likely to come apart when disturbed, leaving the house without water.

Thus a mid-week trip to HPM is made. No matter, a lunchtime trip is an excuse to stop in Big Island Brewhaus and try some of the new menu items, the burgers are great! I note that the cherry trees are also beginning to bloom nicely, all good for the Cherry Blossom Festival next week.

A new regulator, a water pressure gauge, a handful of copper fittings. I have the rest of the needed tools on-hand already… Torch, propane, pipe cutter, flux, solder and pipe compound. I make sure I have everything before I shut off the water. I also warn my wife that the house will be without water for a few hours.

The old regulator is in bad shape, but not that bad. Failure was not imminent, maybe in a few months, but not tomorrow. It was leaking quite a bit, a steady drip. Water shut off at the street and at the supply to the solar water heating system I can open the lines. A little struggle ensues before the old fittings yield and the old regulator can be removed.

Of course the new regulator is smaller, I can not just thread it into place. This is what the copper fittings are for… I cut away the old threaded fittings and measure some new pieces of pipe. While I am cutting and fitting copper I add a new valve above the regulator, a convenient way to drain the household system and a place to attach a pressure gauge when adjusting the new regulator.

Yes, I raked out the pile of old leaves caught in the corner before lighting up the propane torch. No need to burn the house down to do a little plumbing repair.

All done I open the valves and return water pressure to the house. The gauge reads just below 50psi… good, just what the manual stated for the setting from the factory. This is not, of course, satisfactory for Deb, not enough pressure! Adjusting upwards to 60psi and my wife is happier.

The job cost a bit over $100 in parts. All good, and vastly cheaper than calling out a plumber for an easy job. Never mind that Hawaii law requires a licensed plumber to do such a job. Another weekend repair completed. What would I be doing else-wise? Probably painting or cleaning the garage.

Author: Andrew

An electrical engineer, amateur astronomer, and diver, living and working on the island of Hawaiʻi.

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