Map every affected fixture by unit and floor before choosing a clearing point or naming a shared stack.
DOWNTOWN SEATTLE / GUIDE
Blocked Drain Downtown
List slow, stopped, gurgling, odorous, rising, or overflowing drains and the order, level, and ordinary use associated with each change.
BUILDING CONSIDERATIONS
DRAIN CHANGE
A fixture trap, branch, stack, building drain, side sewer, shared line, or public-main condition needs different access and evidence.
Ask how the provider will select the segment, coordinate building access, and distinguish clearing from diagnostic camera or locating work.
01SAFE LIMIT
Stop fixture use when water rises, wastewater returns, or another opening responds.
02BUILDING CONTACT
Do not mix drain products, open an unfamiliar cleanout, remove a trap, or handle wastewater to prepare.
03WATER PATH
Record which fixture changed first and whether lower or neighboring units reported a related pattern.
04AFFECTED SPACES
Keep the affected-unit and vertical-floor map attached to every later finding.
05PROPERTY RECORD
Gather prior clearing points, camera media, location notes, invoices, side-sewer records, and recurring-pattern dates.
06ACCESS PLAN
Ask what access, stack shutdown, neighboring notice, and observation would be needed before equipment is used.
07WRITTEN SCOPE
Separate clearing, camera work, locating, side-sewer inspection, public reporting, repair, cleanup, and restoration.
08CLOSEOUT
Require the accessed point, direction, distance, segment, findings, limitations, post-work result, and next recommendation in writing.
Map the fixture pattern
List every slow, stopped, gurgling, rising, or overflowing fixture by unit and floor. The order in which fixtures changed can be more useful than the broad label of a clogged drain. Note whether a lower opening reacts when an upper fixture is used during ordinary safe operation, but stop immediately if wastewater rises or another test could extend damage.
Find the lowest affected point
The lowest fixture showing a change helps frame which drainage segments deserve attention, but it does not by itself locate a blockage. Keep the fixture trap, branch, stack, building drain, private side sewer, shared side sewer, and public main as separate possibilities until access and findings support one. Include prior clearing locations and recurring dates when those records are available.
Define what the equipment visit includes
Clearing, camera inspection, locating, and repair are different scopes. Ask which access point the provider expects to use, which direction equipment will travel, whether the line must first be cleared, and what happens if the route cannot be entered. A camera image without a labeled starting point, direction, and distance may be difficult to match to a building or side-sewer record later.
Close with the segment, not a slogan
Request a final note that identifies the access point, direction, approximate distance, segment reached, material or condition observed, work completed, and post-work result. Preserve the original media when camera work is included. If the provider recommends excavation, stack work, or a public report, the record should explain which finding supports that next route and which questions remain open.
Disclose earlier drain products and work
Tell the recipient about any drain products, tools, prior clearing, camera work, repairs, or recurring backups connected with the affected fixtures. Do not add another product or mix substances before the visit. Earlier work can change equipment safety and the most useful access point. Preserve the date, point entered, direction, distance, and result when those details exist rather than describing the line as recently cleaned.
Coordinate cleanout and stack access
A cleanout may be inside a unit, common room, garage, ceiling, wall, or exterior area, and its presence does not make it safe or authorized to open. Ask the property contact which points are known and accessible. If a shared stack must be taken out of service, identify the served units, notice method, window, and person responsible for confirming that use can resume.
Treat recurrence as a separate question
Restored flow after clearing does not explain why a restriction returned. When the problem is recurring, keep dates, affected fixtures, earlier access points, removed material descriptions, camera media, repairs, and building or weather patterns together. Ask what additional evidence would distinguish a local-use issue, damaged segment, shared route, side sewer, or public question, and price that investigation separately from routine clearing.
Choose a stopping point for the first visit
Drain work can expand quickly when an access point is blocked, equipment cannot pass, wastewater creates unsafe conditions, or the observed segment differs from the record. Agree on a stopping condition and authorization process before work begins. Ask what result is included in the initial price, whether additional camera or locating work needs approval, and how the provider will leave the fixture, cleanout, and affected area if the route remains unresolved.