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Drain field repair and replacement
Diagnosis first, then a repair scope or a replacement design.
Nanaimo Septic Systems repairs and replaces failed disposal fields. You will see a failing field as water surfacing over it, ground that stays saturated, or slow drains through the whole house. Repair or replacement work valued above $10,000 is eligible for a Regional District of Nanaimo SepticSmart rebate of up to $700, and you apply for it once the work is done. We file a replacement field with Island Health the same way as a new system.
Fields rarely fail all at once. Acceptance slows over years as the soil interface clogs, and the first visible sign usually arrives in the wet season on the lowest part of the field. Once effluent reaches the surface, we check how much of the system still works.
We diagnose before we quote. The Regional District of Nanaimo rebates 75% of eligible expenses to a maximum of $700 on repair or replacement work valued above $10,000, with smaller amounts for risers, effluent filters and distribution boxes.
Telling a tank problem from a field problem
Slow fixtures throughout a house point at the system; one slow fixture points at the plumbing. Effluent at the surface, ground that stays saturated between rainfalls, and a strip of darker, faster-growing grass over the disposal area all point at the field rather than the tank. A tank that has never been pumped can push solids into the field and cause those same symptoms. That's why we check the tank first — sometimes the fix turns out to be far cheaper than expected.
What can be repaired, and what has to be replaced
Effluent filters, distribution boxes and access risers are components, and replacing one is a repair. Once your disposal field stops taking effluent, the soil itself is what failed, and that means a new field. The Regional District of Nanaimo's SepticSmart program rebates 75% of eligible expenses on all of that work.
A replacement field is a new filing
Replacing a disposal field counts as new work. The work is designed by an Authorized Person and filed with Island Health as a Record of Sewerage System before excavation, exactly as a new installation is, and the replacement has to satisfy current standards rather than the ones in force when the original went in. On an older lot that often means the new field cannot go where the old one was.
Repair work quoted
Component repairs
Effluent filters, distribution boxes and access risers brought back to working order.
Replacement disposal field
A new field designed to current standards where the original can no longer accept effluent.
Diagnosis and report
Written findings separating a tank problem from a field problem before any work is quoted.
How a failing field is diagnosed
- 1
Tank first — sludge depth, outlet baffle and effluent filter checked before anything is assumed about the field.
- 2
Distribution check — whether effluent is reaching the whole field or loading one run.
- 3
Field assessment — surface condition, probing, and where the wet season has left its marks.
- 4
Written outcome — a repair scope, or a replacement design and the filing that goes with it.
Wet-season ground is the test
Four things drive local septic failure: thin soil, a wet-season water table, nearness to the ocean, and systems reaching the end of their life. Near Cedar and Yellow Point there's a fifth factor: Aquifer 162 is rated low productivity and high vulnerability, declining by 0.43 m a year on average, and much of the groundwater it feeds is the water people around here drink. So when a field is failing close to a well, we look at the water supply as well as the field.
A typical case
- Situation
- A 1990s house near Yellow Point Road with effluent surfacing at the low end of the field each winter.
- Complication
- The original field sits in a hollow that holds water, and the only replacement area inside the setbacks is 40 m uphill.
- Resolution
- We design a pressure-distributed replacement field for the upper bench, dose it from the existing tank, and file the work as a new Record of Sewerage System.
People also ask
Does a failing field always need replacing?
No. Solids carried over from an unpumped tank, a blocked effluent filter or a distribution box that has shifted can all produce field symptoms, and each is a component repair.
Is there a rebate for septic repairs in the Regional District of Nanaimo?
Yes. SepticSmart rebates 75% of eligible expenses on repair or replacement work on an existing system — up to $700 above $10,000, $400 for risers, $200 for a distribution box and $100 for an effluent filter — though the $700 rebate cannot be combined with the other three on the same job.
Does a replacement disposal field have to be filed?
Yes. A replacement field is filed with Island Health by an Authorized Person before construction, and certified within 30 days of completion.
How long does a disposal field last?
No fixed figure applies. Loading, maintenance history and soil all change the answer, and the Regional District of Nanaimo lists system age as only one of four causes of local failure.
A repair quote connects to three other things: a diagnostic inspection, what has to be filed, and what moves the price.
Septic service in Nanoose Bay is covered separately.
Find out what the ground will take.
Free site assessments across Nanaimo and surrounding areas.
Text or call (236) 362-1344