Make the first conversation useful.
- Keep notes on chlorine, sludge depth, mechanical checks, and spray-head function.
- Ask a service company what each scheduled visit includes.
- Inside Edmond city limits, confirm the separate local yearly requirement.
The two-year rule: For a newly installed aerobic system, OAC 252:641-10-3 assigns the first two years of maintenance to the installer at no additional cost to the owner. After that, the owner maintains it or hires someone.
The statewide rule does not set a dollar price for visits after those two years. See what upkeep costs after the installer's two years.