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.