If you live off 132nd St SE near Seattle Hill Rd and a hard freeze is in the forecast, or you are about to open a wall for a remodel, you may need to drain the plumbing in your house. It sounds like a big job. Mostly it is a matter of order: shut the water off, open the right things in the right sequence, and the lines empty themselves. This is how we walk homeowners in Mill Creek, WA 98012 through it, including the places where a 1990s two-storey on the north end of the city behaves differently from an older Everett bungalow. If you would rather hand the whole thing to a plumbing company serving Mill Creek, that option is at the bottom of the page.
Why draining comes up in Mill Creek north homes
You drain a house for one of three reasons. You are leaving it empty through the winter, you are repairing or remodelling something and the pipes have to be dry, or a cold snap is coming and you have exposed lines. The first two are planned. The third is the one with a clock on it, and the overnight lows that cause trouble here arrive a few nights a year rather than all season, which is exactly why people are caught out.
Most of the houses between Exploration Park and Buffalo Park went up from the mid-1980s through the 2000s. That matters for draining in two ways. The supply lines are almost always copper or PEX rather than galvanized steel, so they drain cleanly and rarely trap water in corroded low spots. And the weak points are not the interior lines at all. They are the hose bibs on the north wall, the line out to a detached garage or shop, and anything running through an unheated garage ceiling. In a crawl-space home, a vent left open under the house will do the same job on a pipe near the rim joist.
Water hammer is the other reason people ask about this. If the pipes bang when a tap or the washing machine valve closes, draining and refilling the system recharges the air chambers and often quiets it. If it comes straight back, the fix is a hammer arrestor rather than another drain-down, which is routine work for the residential plumbing services we run out of Everett.
What to check before you touch the main
- Find the main shutoff and confirm it turns. In most Mill Creek homes it is where the service enters the house, often in the garage or a utility closet, with a second valve in the meter box at the sidewalk. Turn it clockwise. If it is stiff or weeps when you move it, stop there and read the last section.
- Walk the exposed lines. Hose bibs, the irrigation backflow assembly, the garage, any line to an outbuilding. These are the ones that actually need to be empty.
- Check the water heater drain valve. It needs a hose thread and it needs to open. A plastic drain valve on an older tank can crumble when you turn it.
- If you are leaving the house, check outside too. A drained interior does nothing for a sump pit that fills during a wet week or a downspout that discharges against the foundation. Our sump pump service covers that side in the same visit.
The draining order, top floor to hose bibs
- Shut the main. Confirm it is closed by opening a cold tap and watching the flow stop.
- Open every fixture, starting on the top floor and working down: sinks, tubs, showers, the washing machine valves, the fridge line if it has a shutoff, then the exterior hose bibs last. Gravity does the work once the top of the system is open to air.
- Flush each toilet until the tank stops refilling, then sponge the last inch out of the tank. Gurgling from the bowl is air moving through the trap, not a problem.
- Drain the water heater. Cold supply off, hose on the drain valve, run it outside or to a floor drain. The water is hot for the first several minutes, so route the hose where nobody will step on it.
- For a home with galvanized supply or lines that dip under a slab, blow the lines out with compressed air at 30 to 40 PSI at most. Higher pressure can split old fittings. A shop vac in reverse works in theory and almost never in practice.
- Leave every fixture open. Closing them traps a vacuum that can pull seals and stress joints when the water comes back.
Refilling without water hammer
Close every fixture you opened. Open the main slowly, a quarter turn at a time. Then open the lowest fixture in the house and let it run until the sputtering stops and the water runs clear, and move up one fixture at a time. Flush each toilet a few times to clear air pockets. Opening the main wide with everything else closed is how people crack a fitting they did not know was weak.
If you would rather have someone else drain and refill the system, especially before a long absence, call (425) 374-1557 or book a visit. We can winterize the house and check the exterior drainage in one trip.
When it is past DIY
Draining is a homeowner job in most of the houses around 132nd St SE. These are the situations where it stops being one:
- The main shutoff will not close fully, or it leaks from the stem once you move it. A valve that has not been turned in twenty years often does this, and you now have a repair on your hands before the drain-down even starts.
- You find a leak during the process. Water on a floor or a drip from a fitting that was dry before you began means the system was already marginal.
- The house has galvanized steel supply lines. Draining them, blowing them out and refilling can dislodge enough scale to cut flow to a fixture or jam a cartridge.
- The drain-down is part of a bath or kitchen remodel. Opening walls is where slow drains and sagging lines get discovered, and that is work for drain cleaning or, for a line that keeps backing up, hydro jetting rather than a weekend project.
Any of those and you want a licensed plumber in Mill Creek looking at it before the water goes back on. A plumbing company that works the Seattle Hill area every week will know which valves in these subdivisions tend to seize and will bring the parts to replace one on the spot.
How to drain a plumbing system: Mill Creek questions
Do I need to drain the whole house for a Mill Creek freeze?
Usually not. For a few nights in the 20s with the heat on, shut off and drain the hose bibs, disconnect hoses, and open the garage line if it has its own valve. A full drain-down is for a house that will sit empty with the heat off.
How do I drain the water heater without flooding the garage?
Shut the cold supply, attach a garden hose to the drain valve, run the hose outside or to a floor drain, then open a hot tap upstairs to let air in. Open the drain valve slowly. If the valve is plastic and stiff, stop and have it replaced rather than forcing it.
Why does the water sputter when I turn it back on?
Air is leaving the lines. It is normal for the first minute or two at each fixture. Open the lowest fixture first and work up so the air has somewhere to go. If a single fixture keeps sputtering after everything else has settled, its aerator or cartridge has picked up debris.
Danika Plumbing & Electric, 11015 Airport Rd, Everett, WA 98204. We are a plumbing company based at Paine Field and we cover Mill Creek north and Seattle Hill, along with Silver Firs and Silver Lake, from the same shop. Call (425) 374-1557 or schedule online and we will drain, winterize or refill the system for you.
