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uk Home & property emergencies faint hissing by gas meter • hissing near gas regulator • gas meter outside noise • possible gas leak outside • suspected gas leak at meter • smell of gas outside • gas leak in front garden • gas pipe hissing sound • gas regulator whistling • meter box hissing • outside gas supply sound • worried about gas escape • gas emergency control valve • rotten egg smell near meter • neighbour says gas smell • gas leak unsure what to do • natural gas leak outside home

What to do if…
you hear a faint hissing near a gas meter or regulator outside and it worries you

Short answer

Treat it as a possible gas escape: move people away from the area and call the National Gas Emergency Service on 0800 111 999 from a safe distance.

Do not do these things

  • Don’t smoke, vape, or use any naked flame near the meter/regulator area.
  • Don’t operate electrical switches, doorbells, or anything that could spark in the immediate area.
  • Don’t try to “find the leak” with a lighter, flame, spray, or by putting your face close to fittings.
  • Don’t loosen, tighten, dismantle, or adjust the regulator, meter, pipework, or any fittings.
  • Don’t go back and forth “to double-check the sound” once you’ve moved away.

What to do now

  1. Create distance first. Step away from the meter/regulator area and keep others (kids, pets, neighbours) back.
  2. Avoid ignition sources near the suspected leak area. No smoking; don’t ring doorbells or toggle switches close to where you heard the hissing.
  3. If you suspect gas could be drifting toward the building, calmly get anyone inside to move outside into fresh air (don’t stop to investigate).
  4. Call the National Gas Emergency Service: 0800 111 999 (24/7) from a safe location (not standing next to the meter/regulator).
  5. Only if it’s safe to approach and you’re advised to do so, turn off the gas at the Emergency Control Valve (ECV) by the meter (typically a quarter-turn so the handle is across the pipe).
    • If the hissing is right at the meter/regulator and approaching would mean entering the risk area, skip this and wait for the emergency engineer.
  6. Warn nearby neighbours if the meter/regulator is close to other homes (for example terraced/converted buildings). If you need to alert someone very nearby, knock rather than using a doorbell.
  7. Wait for instructions and keep the area clear until the emergency engineer says it’s safe.

What can wait

  • You do not need to decide right now whether it’s definitely a leak, a normal regulator noise, or a meter issue.
  • You do not need to contact your gas supplier, landlord, or insurer until the immediate safety check is underway.
  • You do not need to gather tools, take photos, or try to troubleshoot the sound.

Important reassurance

It’s reasonable to take a faint hissing seriously. Calling the gas emergency service for a check is normal, and you’re not “wasting time” by reporting something that worries you.

Scope note

This is first-steps-only guidance to reduce risk and get the right help to you quickly. Any repairs or confirmation should be done by qualified gas emergency personnel/engineers.

Important note

This guide is general information, not a substitute for professional advice. If you believe there is immediate danger, move away to a safer place and call the appropriate emergency service without delay.

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