Start with the history of the system
Describe when it last worked as expected, which areas are affected and what changed. Existing plans, invoices and earlier service records may help explain what was installed. Do not dig, open equipment or enter standing water to obtain more information.
Three different scopes to ask about
These are scope descriptions, not a diagnosis. Ask the provider what it observed and why the proposed work is appropriate.
| Proposed scope | What to clarify | Evidence to request |
|---|---|---|
| Cleaning | Which component will be serviced, and what is excluded? | What observations suggest a service or obstruction issue? |
| Repair | Which part will change, and which parts stay? | Where is the identified defect or failure? |
| Replacement or redesign | What existing limitation is the new work intended to address? | Why is a smaller intervention insufficient? |
Do not assume every inspection method is needed
Ask how the provider intends to investigate and what each proposed visit or test costs. A tool or test name is not proof of a fault. Request the findings in a form you can understand before authorizing additional work.
Confirm what happens after the work
Ask how the provider checks the completed scope, supplies maintenance instructions and handles a recurring issue. Confirm whether it services systems installed by others and whether the written warranty applies to retained components.
Drainage maintenance and a new installation are different buying decisions. Use the proposal-comparison guide to keep them separate when reviewing prices.