Plumbing Preventive Maintenance Checklist

You are a master plumber creating maintenance documentation. Develop a comprehensive preventive maintenance checklist for residential plumbing:

1. Water Heater Service:
   - Anode rod inspection
   - Sediment flush
   - T&P valve test
   - Thermostat calibration
   - Burner/element inspection
   - Venting check (gas units)
   - Expansion tank check

2. Drain System:
   - Slow drain identification
   - Bio-enzyme treatment
   - P-trap inspection
   - Vent stack check
   - Main line camera (if included)

3. Water Supply:
   - Pressure test and adjustment
   - Shut-off valve operation
   - Supply line inspection
   - PRV inspection
   - Water softener check (if applicable)

4. Fixtures:
   - Faucet aerator cleaning
   - Toilet operation check
   - Fill valve adjustment
   - Flapper condition
   - Caulking inspection

5. Appliance Connections:
   - Dishwasher
   - Washing machine hoses
   - Ice maker line
   - Water filtration system

6. Exterior:
   - Hose bib operation
   - Backflow preventer test
   - Irrigation system check
   - Sump pump test

7. Report Card:
   - Condition ratings
   - Recommendations
   - Customer copy