New Homeowner Plumbing Checklist: 10 Things to Learn About Your House
You just moved into a new home.
You know where the bedrooms are.
You know which cabinet holds the coffee.
But do you know how to shut off the water?
Understanding a few basic things about your home's plumbing before a problem occurs can make maintenance and emergencies much easier to handle.
Here are ten things every new homeowner should learn.
1. Find the Main Water Shutoff
This should be near the top of your list.
Locate the main water shutoff and understand how your particular system is designed to operate.
Don't wait for a major leak to begin searching for it.
2. Find Fixture Shutoff Valves
Look underneath sinks and near toilets.
Learn which valves control individual fixtures and keep them accessible.
If a valve appears deteriorated or doesn't operate normally, don't force it.
3. Look Under Every Sink
Open every kitchen and bathroom cabinet.
Check for:
- Moisture
- Water stains
- Corrosion
- Damaged supply lines
- Leaking drain connections
This also gives you a baseline for future inspections.
4. Learn Where the P-Traps Are
The curved drainpipe beneath a sink is typically the P-trap.
Knowing what it looks like can help you understand future drainage problems and identify where certain accessible leaks may occur.
5. Inspect the Toilets
Flush each toilet and observe how it operates.
Listen for continued running or unexpected refilling.
Look for unexplained moisture around the fixture.
6. Check Faucets and Showers
Operate each faucet and shower.
Pay attention to:
- Flow
- Hot and cold operation
- Dripping
- Unusual spray patterns
- Leakage around fixtures
Knowing normal operation makes future changes easier to notice.
7. Identify Water-Connected Appliances
Depending on the home, these may include:
- Dishwasher
- Washing machine
- Refrigerator or ice maker
- Water filtration equipment
- Water heater
- Other equipment
Learn how they're connected and where appropriate controls are located.
8. Look for Old Water Damage
Stains don't always indicate an active leak.
But you should understand where previous moisture problems may have occurred.
If you're unsure whether an area is currently wet, investigate rather than assuming the issue is historical.
9. Learn What Shouldn't Go Down the Drain
Good plumbing maintenance starts with what you keep out of the system.
Avoid treating sinks and toilets like trash cans.
Keep grease, inappropriate debris, and unsuitable materials out of drains.
10. Keep Basic Plumbing Information Together
Create a simple home record containing:
- Main shutoff location
- Plumber contact information
- Fixture model information where useful
- Appliance documentation
- Photos of important plumbing areas
- Notes about previous repairs
This information can become extremely useful years later.
New Homeowner Plumbing Checklist
✔ Locate main shutoff
✔ Find fixture valves
✔ Inspect under sinks
✔ Check supply lines
✔ Identify P-traps
✔ Test toilets
✔ Check faucets and showers
✔ Identify water-connected appliances
✔ Look for moisture damage
✔ Save important plumbing information
Final Thoughts
You don't need to become a plumbing expert when you buy a house.
You simply need to understand your own home.
Know where the water comes from.
Know where it drains.
Know how to shut it off.
And know what your plumbing normally looks and sounds like.
The best time to learn these things is today—not when water is already spreading across the floor.