Diagnostic tree

"Slow drain" means six different things. Each gets a different fix.

This is the actual decision tree our techs run before any cable comes off the truck. Walk down the tree with us before you pay anyone to snake your drain.

Drain is slow or backed up
Is more than one fixture affected?
Yes — multiple drains

Main line restriction

The clog is past the branch — in the main line itself. Cabling a single fixture won't reach it. We cable from the main cleanout and camera-verify.

No — one fixture

Branch- or fixture-level issue

Local to this fixture — could be P-trap, vent, fitting, or true clog. Continue diagnosis below.

Service pathContinue to next question ↓
Does water gurgle in another drain when this one drains?
Yes — gurgling

Venting issue, not a clog

The vent stack is partially blocked — usually a bird's nest, leaves, or ice plug at the roof penetration. Cabling the drain won't help. We clear the vent.

What we doRoof vent inspection + clearing — $185 flat
No gurgling

True drain restriction

Continue to the next question to determine if it's a clog or a broken pipe.

Service pathContinue to next question ↓
Did the slow drain happen suddenly, or get worse over weeks?
Sudden — overnight

Likely true clog

Something physical lodged in the line — hair mat, kid's toy, "flushable" wipe. Cable clears the obstruction, line restored.

Service pathDrain cleaning →
Gradual — weeks

Buildup or pipe failure

Either grease/scale buildup in the line (hydro jet candidate) or a dropped fitting / cracked collar (P-trap repair). Camera-scope confirms which.

Service pathCamera inspection $0 with service → then jet, cable, or repair
Hidden causes

Five Detroit drain failures that masquerade as "clogs"

Each of these mimics a clog — slow drain, gurgling, smell, backup. Cabling doesn't fix any of them. We see all five every week.

01

Dropped fitting

Cast iron joint loosens, the elbow drops 1/4". Water sits, eventually backs up. Cabling makes it worse. Fix: repair coupling — $245.

02

Cracked P-trap

Hairline crack in the trap arm. Drains slow because air enters mid-flow. Often misdiagnosed as clog. Fix: trap replacement — $195.

03

Blocked vent stack

Bird nest, leaves, or winter ice plug at the roof. Drain pulls a vacuum, runs slow. Fix: roof vent clearing — $185.

04

Bellied pipe

Pipe section dropped under settled soil. Creates a low spot that traps water and debris. Fix: spot repair or sleeve — quoted on-site.

05

Failed wax ring

Toilet rocks slightly, wax ring loses seal. Sewer gas escapes, "slow flush" pattern. Fix: pull-and-reseat toilet — $215.

Cabling vs repair

When does the drain need repair instead of cleaning?

Sometimes cabling is the right answer. Sometimes it's pushing the problem an inch further down the pipe. Here's how we decide.

Cable the drain Most common

The pipe is structurally fine, but an obstruction is sitting in it. Cable clears, hot-water flow restores, you're back in business.

  • Sudden onset, single fixture
  • No gurgling in other drains
  • Camera shows intact pipe wall
  • No visible offsets or bellies
  • Repeat clogs more than 12 months apart

Repair the drain When cabling won't hold

The pipe itself has failed. Cabling provides 2 weeks of relief and then the problem returns — sometimes worse. Repair is the lower-cost path long-term.

  • Cabling didn't restore flow fully
  • Camera shows offset, crack, or belly
  • Repeated clogs at the same spot
  • Visible water staining at the fitting
  • Sewer odor without an obvious cause
Diagnose · repair · verify

How a repair-first Detroit call goes

We don't cable first and figure it out later. We diagnose first, quote the actual fix, then do the work.

1

Diagnostic check

Visual + scope + auger-test. We walk the decision tree above with you.

2

Flat-rate repair quote

Repair quoted per failure type — trap $195, vent $185, fitting $245, etc.

3

Repair

Replace what's broken. Cleanly cut, properly glued, code-compliant. Test fit before close-up.

4

Flow + leak verify

30-minute flow test from every upstream fixture. No drips, no slow drain, no callbacks — guaranteed.

Sibling coverage

Clogged Drain Repair across every Metro Detroit city

Same clogged drain repair workflow in every city we cover. Live phone dispatch, flat-rate pricing, and licensed Michigan plumbers under one operator.

Diagnose, don't guess

Don't pay to snake a drain that doesn't need snaking.

We diagnose first. If it's a true clog, we cable it. If it's something else — trap, vent, fitting, belly — we repair what's actually broken. Flat-rate either way.

5
Mis-diagnosed causes we fix weekly
$185+
Repair flat rate
100%
Camera-verified
30day
Repair guarantee