Safety Checklist
Step-by-step safety checklists for a gas leak, home fire prevention, night driving and open water swimming.
About this tool
Safety Checklist
Step-by-step safety checklists for a gas leak, home fire prevention, night driving and open water swimming.
Pick the situation and work through the checklist, so the important steps are not left to memory. This page brings together 4 separate safety checklist pages (Gas leak, Home fire, Night driving, Open water swim) so you can compare them without hunting for the right one.
How to use Safety Checklist
- 1
Open Safety Checklist on AltFTool — it loads instantly in your browser.
- 2
Choose your situation at the top: Gas leak, Home fire, Night driving, Open water swim. On a phone it is a drop-down list.
- 3
Fill in the safety checklist for that situation; each of the 4 options keeps its own rules, data and defaults.
- 4
Read the result, then switch situation to compare. The page link keeps your situation (?v=gas-leak), so you can bookmark or share it.
Why use Safety Checklist
All 4 in one place
Gas leak, Home fire, Night driving and the rest sit behind one picker, so switching situation takes a tap instead of a new search.
Built for each option
Every situation keeps its own rules, numbers and defaults rather than one generic template.
Shareable view
The link remembers the situation you picked, so a bookmark or a shared link opens straight on it.
Common use cases
- Deciding where to mount a gas detector when you switch a kitchen from LPG cylinders to piped natural gas
- Running a room-by-room safety check after moving into a new home, before you know its quirks
- Running a pre-departure check before an overnight highway drive to a hometown or hill station
- Run a two-minute check on the bank before a lake swim, so you notice the missing tow float while you can still fetch it.
Frequently asked questions
Which situation options does this tool cover?
4: Gas leak, Home fire, Night driving, Open water swim. Pick one at the top of the tool; the page link updates (for example ?v=gas-leak) so you can bookmark or share that exact view.
Is LPG heavier or lighter than air?
LPG is heavier — a butane/propane blend has a vapour density around 1.9 times that of air, so it sinks, pools at floor level and flows into basements, drains and lift pits. Piped natural gas is methane at about 0.55 times air density and does the opposite, rising to the ceiling. That is why an LPG detector mounts near the floor and a PNG detector near the ceiling.
How many smoke alarms does a house need?
One inside every bedroom, one outside each separate sleeping area, and at least one on every level of the home including the basement — the NFPA rule. For a three-bedroom single-storey home that is a minimum of four. Interlinking them so one sounding triggers the rest is a meaningful upgrade, because a fire that starts far from the bedrooms is the one that gives the least warning.
Why is night driving more dangerous than driving in daylight?
Depth perception, peripheral vision and colour recognition all fall away in low light, and headlights on low beam typically light only 50–60 metres ahead — less than the stopping distance at highway speed. Add oncoming glare, more fatigued and impaired drivers on the road, and the risk per kilometre driven is several times the daytime rate.
What water temperature is too cold to swim in?
Open water competition under World Aquatics rules does not run below 16 °C, and below 15 °C the cold shock response is strong enough that unacclimatised swimmers lose breathing control in the first minute. Cold water swimming below that is done by acclimatised swimmers with short exposures, supervision and a warm change plan.