Annual backflow testing in Seattle: how I got ours done for $50 a unit

Our first year as a self-managed HOA, a letter showed up from Seattle Public Utilities. We were behind on backflow testing for our fire sprinklers. I had no idea what that meant, that it was an annual requirement, or that nobody in our building had ever scheduled it.

I live in a four-unit townhome building in Seattle, and I am the board president. So it was on me. It turned out to be one of the easiest compliance items on our calendar once I understood it. This is what I wish someone had told me before that letter arrived.

What a backflow assembly actually does

Your fire sprinkler system is connected to the same city water supply as your kitchen faucet. The difference is that sprinkler water just sits in the pipes, sometimes for years. It is stagnant, and depending on the system it can pick up rust, sediment, or treatment chemicals.

Normally water only flows one way: from the city main into your building. But if pressure in the main drops (a water main break, or firefighters opening hydrants nearby), water can get pulled backward. A backflow prevention assembly is a set of check valves that stops that from happening, so sprinkler water never ends up back in the drinking water supply.

The problem is that these valves are mechanical. Springs weaken, seals wear out, debris gets stuck. You cannot tell by looking at one whether it still works. The only way to know is to test it.

Why it is required every year

Per Seattle Public Utilities, backflow assemblies must be tested annually by a Washington State certified Backflow Assembly Tester (BAT). This is not just a city rule. It is also required under Washington State law, and test reports have to include the information spelled out in WAC 246-292-036.

A few things surprised me:

• It is the owner's responsibility, not the city's. SPU sends reminders, but it is on the water service owner to get the test done on time. For a small HOA, that usually means the board.
• The tester files the paperwork. After the test, the certified tester submits the report directly to SPU. You do not have to fill out forms yourself.
• It can escalate. If testing is not completed, SPU says it may assess non-compliance charges and can terminate water service.

That last point is where the money comes in. SPU's customer charges schedule lists a $105 charge per backflow preventer for each reminder letter it has to send after the first notice, and $155 for a late assembly test shutoff notice. With four assemblies, one round of reminders is over $400. Let it slide a few months and you are into several hundred dollars a month for something that costs less than that to just fix.

How I found a tester

SPU points you to the Hire a BAT list maintained by Washington Certification Services at Green River College, on behalf of the state Department of Health. You pick your county (King County, for us in Seattle) and get a list of certified testers with phone numbers.

My process was simple: go down the list and start calling.

I got a real range of quotes. Some of the larger companies were clearly pricing for commercial buildings. The one I went with was an independent tester who did all four units for $200 total, or $50 per assembly. He did not have a website. What he did have was a listed phone number, a solid number of Google reviews, and a spot on the state's certified list.

That is the main thing I would pass along: small independent testers often come in well under the bigger firms. Do not skip someone just because they do not have a polished website. Check that they are on the Hire a BAT list, read their reviews, and ask for a price for your number of assemblies.

Why price matters more than usual here

For most contractor work, I would never tell a board to just pick the cheapest bid. (We have a whole guide on vetting contractors for that reason.) Roofing, siding, and paving all have real quality differences.

Backflow testing is different. It is a fairly mechanical, standardized procedure. Every certified tester uses a calibrated test kit and follows the same steps, and SPU requires each tester to have their current state certification and test kit calibration on file before it will even accept their reports. You are not paying for craftsmanship. You are paying for someone certified to run the test and file the report.

So the things that actually matter are:

• Certification. They are on the state list and their credentials are on file with SPU.
• Price. Quotes vary a lot for the same work.
• Scheduling. They can come before your deadline.
• Follow-through. They submit the report and send you confirmation.

The one caveat: if an assembly fails its test, it needs repair and a retest. That is a different conversation, and it is worth getting a separate quote for repair work rather than assuming the tester's price is the best one.

What the day actually looked like

This was much less daunting than I expected.

1. I coordinated access with each unit. The assemblies in our building are inside the individual townhomes, so I messaged each neighbor, picked a morning that worked, and made sure someone would be home or had left access.
2. I walked the tester around. I met him out front and took him unit to unit.
3. He ran the tests. All four assemblies took about 30 minutes total.
4. He handled the paperwork. He compiled the reports and sent them to SPU himself.

The only thing I would add: ask your tester to send you a copy of what they submitted. SPU specifically recommends keeping documentation for your records that confirms your results were filed. If a notice ever shows up in error, you want that email.

Make it a calendar item, not a surprise

The real mistake we made was not knowing this existed. Nobody before me had written it down, and the requirement did not live anywhere a new board member would find it.

Now it is a recurring item on our annual calendar, a few weeks before our due date, with the tester's name and number attached. Next year it will be one text message and one morning.

If you are on a small HOA board in Seattle and your building has fire sprinklers, a few things to do this week:

• Find out if you have testable backflow assemblies and how many. Your last SPU notice, or a call to SPU, will tell you.
• Check when your last test was filed. If you do not know, ask SPU.
• Pull up the Hire a BAT list for your county and call three or four testers for quotes.
• Put next year's test on the calendar the day this year's is done.

Tracking recurring obligations like this is a big part of why I built Fourplex. The things that get small HOAs in trouble are rarely hard. They are just easy to forget when nobody is paid to remember them.