Lee's Advantex ATU Overflow: Five cascading failures behind a $17,303 repair in Woodinville, WA

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Lee's Advantex ATU Overflow

Five cascading failures behind a $17,303 repair in Woodinville, WA

PROJECT SNAPSHOT

Leota, Woodinville, WA 98072 1,500-gallon ATU with Advantex packed bed filtration

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https://septicsolutionsllc.com/projects/advantex-atu-overflow-woodinville-king-county-case-study/

Western Washington case study

Case snapshot $17,303 Total phases 1–5

1,900– Emergency pump2,000 out gal

5 stages

2016

Cascading repair

Last full county filing

Outcome

Pump, floats, filters, risers, seal work and control panel sequence restored the system

SEPTIC SOLUTIONS LLC

https://septicsolutionsllc.com/projects/advantex-atu-overflow-woodinville-king-county-case-study/

Western Washington case study

The starting problem • Wastewater surfaced around treatment-system lid • Tank kept filling with water after previous pump-outs • County records showed a long compliance gap

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Diagnostic framing

The visible symptom was not treated as the full diagnosis. The crew traced the failure through the septic system until the real constraint was visible.

https://septicsolutionsllc.com/projects/advantex-atu-overflow-woodinville-king-county-case-study/

Western Washington case study

What the inspection revealed 1

Both compartments were completely flooded

2

Heavy roots entered through riser joints

3

Advantex filters were blinded with sludge and scum

4

Discharge pump, three floats and control board failed

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https://septicsolutionsllc.com/projects/advantex-atu-overflow-woodinville-king-county-case-study/

Western Washington case study

Failure mechanism: symptom → cause → repair Visible symptom

Hidden cause

Correct repair

Wastewater surfaced around treatmentsystem lid

Both compartments were completely flooded; Heavy roots entered through riser joints

Replace control panel and restore alarm compliance

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https://septicsolutionsllc.com/projects/advantex-atu-overflow-woodinville-king-county-case-study/

Western Washington case study

Repair / service workflow

Step 1

Step 2

Step 3

Step 4

Step 5

Drain flooded tank to expose components

Deep-clean Advantex filters and distribution socks

Jet Set hydro-seal risers and tank penetrations

Replace pump and 3float assembly

Replace control panel and restore alarm compliance

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Western Washington case study

Homeowner lessons • ATU failures cascade when annual maintenance is skipped • Pumping water out does not fix blinded filters • A dead control board means no high-water warning

SEPTIC SOLUTIONS LLC

https://septicsolutionsllc.com/projects/advantex-atu-overflow-woodinville-king-county-case-study/

Western Washington case study

Full case study Read the full Advantex ATU overflow case study

https://septicsolutionsllc.com/projects/advantex-atu-overflow-w oodinville-king-county-case-study/

Septic Solutions LLC · Western Washington

SEPTIC SOLUTIONS LLC

https://septicsolutionsllc.com/projects/advantex-atu-overflow-woodinville-king-county-case-study/

Western Washington case study