# Drain cleaning

A single slow sink and a backup affecting several fixtures need different investigations. Record which fixture shows the problem first and what is being used at the time. Tell the plumber about earlier clearing attempts or recurring symptoms without assuming a particular pipe has failed.

## During the assessment

Ask how the initial assessment distinguishes a fixture blockage from a common drain or sewer issue. If inspection equipment or a particular cleaning method is proposed, ask what it is intended to establish and whether it suits the known pipe condition. Keep chemical products and earlier attempts in the history.

## Compare the complete scope

Compare the initial clearing scope, any inspection, access requirements and what happens if the blockage recurs. If excavation or replacement is recommended, ask for the findings supporting that larger project. Clearing a restriction and repairing damaged pipe are different services.

## Have these details ready

- The first fixture affected
- Other drains showing the same symptom
- Previous cleaning attempts and products used
- Access to any known cleanout location

## Does a recurring blockage mean the sewer must be replaced?

A recurring symptom warrants investigation, but it does not identify the cause by itself. Ask what the inspection found and how those findings support the proposed remedy. Compare clearing, further diagnosis and structural repair as distinct scopes.

## Further reading

- [EPA WaterSense: household leak resources](https://www.epa.gov/watersense/fix-leak-week)