Job Story

Water Heater Replacement in Mill Creek: What a Complete Install Includes

By Done Right Plumbing·September 2026
New 50-gallon Bradford White gas water heater on a stand in a garage, with new copper piping, a pressure gauge, seismic straps and an expansion tank on the wall
The finished install in Mill Creek — tank on its stand, both straps in, new copper with a shutoff and gauge, and the expansion tank mounted and dated on the wall bracket.

A Mill Creek homeowner in the neighborhoods south of Town Center needed a water heater replaced, and Nick and Jeremy handled it as a same-day swap. The interesting part of this job is not that a tank was replaced — it is everything around the tank that made it a complete installation instead of a quick one.

What We Did

The new unit is a 50-gallon Bradford White gas tank, set up on a proper stand in the garage rather than on the floor, with both seismic straps anchored — the detail Washington code asks for and hurried installs skip. The gas connection went in with a new flex connector to the valve, and the water side was rebuilt in clean copper with a full-port shutoff the homeowner can actually operate, plus a gauge on the new assembly so pressure can be read right at the tank.

The piece that earns its own paragraph is the expansion tank. Mill Creek homes on district water are closed systems, so when the water heater warms up, the expanding water has nowhere to go without one. The crew installed a new expansion tank on its own wall bracket, checked its charge against the house, and wrote the install date on it — a small habit that tells the next technician everything at a glance.

Manufacturer data plate on the new water heater showing the model, 50-gallon capacity and 40,000 BTU natural gas rating
The data plate on the new tank — 50 gallons, 40,000 BTU, natural gas, sized to the household rather than to whatever was on the truck.

Why It Matters

  • The stand and straps are not decoration. A gas water heater in a garage belongs up off the floor with both seismic straps anchored — that is code, and it is cheap insurance in earthquake country.
  • An expansion tank protects everything downstream. On a closed system, skipping it means the pressure of every heating cycle works over your valves, supply lines and the new tank itself.
  • New valves belong with a new tank. Reconnecting a fresh water heater through a tired old shutoff wastes the best moment to replace it.
  • A dated install is an honest install. The service sticker and the date on the expansion tank mean the next person who opens that garage knows exactly what was done, and when.

Why Mill Creek

Mill Creek's neighborhoods went in together through the 1980s and 90s, which means their water heaters age together too — most houses here are on their second or third by now. When yours comes due, the difference between a tank swap and a complete installation is the list above, and it is the difference you will not see until years later.

Ready for Yours to Be Done Right

If your water heater is past its tenth year or already misbehaving, call 425-245-7552 for a free estimate, or request a callback.

More: water heater installation · water heater repair · plumbing in Mill Creek

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