DIY & safety
What you can safely check yourself
None of this is repair work. It's the set of observations and low-risk checks that either solve a small problem outright or let you describe the situation accurately to a professional.
A surprising share of plumbing call-outs come down to something simple: a partly closed valve, a clogged aerator, a tripped breaker on a water heater, a sump pump float stuck against the side of the pit. Checking those first costs you ten minutes and may cost you nothing else.
The rule that keeps this safe is simple: look, don't dismantle. If a check requires cutting, soldering, opening a sealed unit, working on gas, or draining a system, it isn't on this page.
Find and test your shut-off valves
- Locate the main water shut-off — often where the supply enters the house, near the meter, or in a basement or utility space.
- Locate the individual stop valves under sinks and behind toilets.
- Know where the gas shut-off is, and where your electrical panel is, without touching either.
Observe and describe the symptom
- Is it one fixture or several? One slow drain is usually local; several at once points further down the system.
- Is it hot water only, cold only, or both?
- Does it happen constantly, or only when something else runs?
- Take a photo or short video — it helps a plumber enormously over the phone.
Simple, low-risk checks
- Clear visible hair and debris from a drain opening or a pop-up stopper.
- Unscrew and rinse a faucet aerator or clean a shower head.
- Check whether a water heater's breaker has tripped, or whether a gas unit's pilot or status light indicates a fault.
- Look under sinks and around the water heater for damp, staining, or corrosion.
- Read your water meter with everything off, then again an hour later, to check for a hidden leak.
- Check that a sump pump's float moves freely and that the discharge line outside isn't blocked.
Stop and call someone if…
- You smell gas, or a gas detector sounds.
- Water is near outlets, the electrical panel, or an appliance's wiring.
- Sewage is coming back into the home.
- You can't stop water escaping.
- A check would mean working on a water heater, a gas appliance, a main supply line, or anything behind a wall.
Guides where these checks help most
- Clogged drainWater drains slowly or not at all from a sink, tub, or shower. Often local to one fixture — sometimes a sign of something larger.Medium
- Low water pressureWater flows weakly. Whether it's one fixture or the whole house tells you almost everything about where to look.Medium
- Running toiletThe toilet keeps refilling, hisses between flushes, or cycles on its own. Usually a worn tank part — and a large, quiet waste of water.Low
- No hot waterNo hot water at all, not enough, or it runs out quickly. The pattern points toward the cause.Medium