Where should I install a propane detector?

Propane is heavier than air, so install the detector low, near the floor, close to where the gas appliance or tank connection is located.

Does soapy water really find gas leaks?

Yes. The soap solution forms bubbles at the exact point of the leak when gas pushes through. It is the standard field test for gas connections.

What does a gas leak smell like?

Gas companies add mercaptan, an odorant that smells like rotten eggs or a skunk. A strong, persistent smell means a leak is present.

How often should I test my gas detector?

Test monthly with the test button, and replace the detector by its expiry date (usually 5–7 years) or when the alarm no longer responds.

Gas Leak Detection: How to Find and Prevent Propane Leaks — DPPropaneSupply

How to detect propane and natural gas leaks — the smell test, soapy water method, electronic detectors and alarms, common leak points, and what to do when you find one.

Why Gas Leak Detection Matters

Propane and natural gas are safe when contained. When they leak, they can create a fire or explosion hazard in minutes. In Canada, every home with a gas appliance should know how to detect a leak and have a certified alarm where required by code.

The Five Ways to Detect a Leak

Smell: propane and natural gas have an added odorant (mercaptan) that smells like rotten eggs or skunk. If you smell it, act.
Soapy water: brush a soap-and-water solution over joints and fittings with the gas on. Bubbles mean a leak.
Electronic detector: propane detectors mount low (propane is heavier than air); natural gas detectors mount high.
Sound: a hissing noise near a valve or fitting can indicate a leak.
Physical signs: dying grass over an underground line, or frost on a tank valve in warm weather.

Common Leak Points

Regulator-to-tank connection (the most common)
Hose ends and quick couplers
Appliance valve connections
Pilot light fittings on older appliances
Orifice jets that were cross-threaded

What to Do If You Smell Gas

Stop — do not light anything, do not flip electrical switches, do not use the phone inside.
Turn off the gas at the tank or main valve if you can do so safely.
Leave the building immediately.
Call from outside: your propane supplier, the utility, or 911 if the leak is significant.
Do not return until a professional says it is safe.

Choosing a Gas Detector

Buy a detector certified for the fuel you use — propane or natural gas — with a CSA or ULC mark. Combination units that detect both carbon monoxide and combustible gas are available and are a good choice for bedrooms and basements. Test the alarm monthly and replace the unit by its expiry date, usually 5–7 years.

Prevention Tips

Inspect hoses before every season for cracks or brittleness. Tighten connections with the correct wrench — never overtighten brass fittings. Replace rubber hoses every 10 years or when they show wear. Keep the regulator vent clear of debris. And never store propane cylinders indoors.

Gas Leak Detection: How to Find and Prevent Propane Leaks