The practical repairs and maintenance tasks every adult should know — plumbing, electrical, tools, and appliances. Stop paying for things you can safely do yourself.
Most plumbing fixes are surprisingly simple. Knowing these saves you hundreds every year in unnecessary call-out fees.
Before any plumbing emergency — burst pipe, overflowing toilet, leak — you need to cut the water off fast. Every household member should know: (1) the main shut-off valve location (usually near the water meter, under the sink, or in the basement), and (2) the individual shut-offs behind every toilet and under every sink. Know these before you ever need them.
A running toilet wastes up to 200 gallons of water per day. Fix it in 15 minutes.
A toilet that keeps running is almost always one of three things. Remove the tank lid and observe what's happening.
Pro tip: Jiggling the handle temporarily fixes it because you're manually repositioning the flapper. That's just masking the problem — replace the flapper.
The right tool and method for every type of clog.
Clogged drains are the #1 most common plumbing call. 95% are entirely DIY-fixable.
Usually hair and soap buildup right at the drain. Remove the stopper (unscrew or lift-and-turn). Use a zip-it tool ($3) or drain snake to pull out the hair clog. Avoid chemical drain cleaners — they corrode pipes over time and rarely work fully.
Usually grease and food buildup. First try boiling water poured slowly. Then use a plunger (cup plunger, not flange). If that fails, clear the P-trap: place a bucket under the U-shaped pipe below the sink, unscrew the slip joints, clean it out, reassemble.
Use a flange plunger (the one with the rubber flap that folds out) — not a cup plunger. Create a tight seal, push down slowly, then pull back sharply. Repeat 10–15 times. Most clogs clear within 1–2 minutes. For stubborn clogs, use a toilet auger (closet snake).
Use a $2 hair catcher in shower drains. Never pour grease down the kitchen drain — let it solidify and throw it away. Run hot water for 30 seconds after each use. Clean bathroom stoppers every 2–3 months.
A faucet dripping once per second wastes 3,000 gallons per year.
Dripping faucets almost always have a worn-out internal seal or cartridge. The fix differs slightly by faucet type, but the principle is the same.
The hardest part is identifying your faucet type. Google the brand name + "faucet type" to confirm before buying parts.
Small leaks under sinks are easy to address before they become disasters.
Most under-sink leaks come from loose slip-joint fittings on the P-trap, not from burst pipes. These require no tools — just hand-tightening.
How to flush it, adjust temperature, and know when it's failing.
Set to 120°F (49°C). Hot enough to prevent Legionella bacteria growth; cool enough to prevent scalding. Most water heaters have a dial on the tank side. Electric water heaters often need the panel removed to access thermostats on both heating elements.
Sediment builds up at the bottom of the tank, reducing efficiency and shortening the heater's life. Attach a hose to the drain valve at the bottom, turn off the cold water supply, open the drain valve and let it flush until clear. Takes 15 minutes.
Rusty water, rumbling/banging noises (sediment overload), water pooling beneath the unit, inconsistent hot water, or the unit is over 10–12 years old. The anode rod (a sacrificial magnesium or aluminium rod) should be inspected every 3–5 years and replaced if corroded.
Completely normal. Read the label on your water heater — it has re-lighting instructions specific to your model. Generally: set knob to Pilot, push and hold the igniter button, hold for 60 seconds after the flame lights, then rotate to your temperature setting.
Most small electrical jobs are genuinely DIY-safe when you follow one absolute rule: turn the power off at the breaker first. Always.
DIY electrical is legal and safe for small jobs. But call a professional for: installing a new circuit, working on your main electrical panel, anything in a wet location without proper GFCI protection, aluminium wiring (common in homes built 1965–1973), and any work that requires a permit in your area. Saving $200 is not worth an electrical fire.
The most important thing to understand in your home.
Your electrical panel (breaker box) distributes power throughout your home through individual circuits. Each circuit breaker protects a specific area from overloads.
A dead outlet is almost always a $3 fix. Here's how.
Critical first step: Turn off the breaker for that circuit. Then use a non-contact voltage tester (~$15, worth every cent) to verify the outlet is dead before touching any wires.
These outlets save lives. Every bathroom, kitchen, and outdoor outlet should have one.
A Ground Fault Circuit Interrupter (GFCI) outlet detects the tiny current difference that occurs when electricity is flowing through a human body instead of the circuit — and shuts off in 1/40th of a second. This is fast enough to prevent electrocution.
All outlets within 6 feet of a water source: bathrooms, kitchens (countertop outlets), garages, outdoor outlets, basement outlets near utility sinks, and anywhere near a pool or hot tub. In the US, this has been code since the 1970s–2000s (different rooms added over time). Older homes may not have them.
Every GFCI outlet has TEST and RESET buttons. Press TEST monthly — the outlet should go dead. Press RESET to restore power. If it doesn't trip when tested, or won't reset, replace the outlet. A failed GFCI provides no protection.
GFCI outlets have LINE terminals (incoming power) and LOAD terminals (power out to downstream outlets). If wired through LOAD, one GFCI outlet can protect every outlet downstream on the same circuit. Check your outlets — if one is marked "GFCI Protected," the protection comes from another outlet upstream.
AFCI (Arc Fault Circuit Interrupter) breakers protect against arcing faults in wiring — the type that cause house fires from damaged extension cords or wires inside walls. Modern code requires AFCI in bedrooms. If your panel has breakers with TEST buttons, those are likely AFCI — test them annually.
A simple wiring job that completely transforms a room.
Where to place them, how often to test, and when to replace.
Inside every bedroom, outside each sleeping area, and on every level of the home (including basements). Mount on the ceiling or high on a wall — smoke rises. Keep them at least 10 feet from cooking appliances to reduce false alarms.
On every level of the home and near sleeping areas. Carbon monoxide doesn't rise or fall — it mixes with air — so mid-wall height is fine. Required near any gas appliances (furnace, water heater, dryer, fireplace, garage).
Test monthly by pressing the test button — you should hear a loud alarm. Replace batteries annually (do it when clocks change). Replace battery-only detectors every 7–10 years. Most detectors have a manufacture date on the back.
Headache, dizziness, nausea — easy to confuse with the flu, especially at night. If your CO alarm goes off: get everyone out immediately, leave the door open, call emergency services from outside. Never go back in until cleared. Carbon monoxide is odourless and colourless — you cannot detect it without a detector.
You don't need a full workshop. These 15–20 tools handle 80% of everything that will ever go wrong in your home.
For hand tools (hammers, screwdrivers, pliers), brand matters less — buy mid-range once. For power tools, stick to one brand system — Milwaukee, DeWalt, or Makita — so all your batteries are interchangeable. A 2-piece starter kit (drill + impact driver) with two batteries is more valuable than five individual tools from different brands.
Everything you need to start — in order of importance.
A set of Phillips (#1, #2, #3) and flathead screwdrivers. Alternatively, a single ratcheting multi-bit screwdriver covers most needs. Never use a flathead where a Phillips fits — you'll strip the screw head.
16 oz is the standard. One side drives nails; the curved claw pulls them. Hold the handle at the end for maximum force, not near the head. A rubber mallet is also useful for assembling furniture without marring surfaces.
25 ft minimum. The hook at the end slides slightly — this is intentional, compensating for its own thickness when measuring from inside corners vs. outside. Always lock before reading.
An 8" and 12" adjustable wrench handle 90% of nuts and bolts. Add needle-nose pliers and channel-lock (slip-joint) pliers for gripping, bending, and plumbing work. Never use pliers as a wrench substitute — they round bolt heads.
Opening boxes, scoring drywall, cutting caulk, and a hundred other uses. Replace blades often — a sharp blade is safer than a dull one (requires less force and slips less).
A 24" torpedo level is enough for most hanging tasks. Keep the bubble centred between the lines. Essential for shelves, picture frames, and installing anything that would look terrible crooked.
Teflon (PTFE) tape goes on pipe threads before assembly to prevent leaks — wrap clockwise 3–4 times. Silicone caulk seals around tubs, sinks, windows, and doors. Cut the nozzle at 45° and use a caulk gun for a clean bead.
A good LED headlamp is more valuable than a flashlight — it keeps both hands free. Essential for working in attics, under sinks, and during power outages.
The drill-driver combo is the foundation of everything else.
90% of a professional finish comes from prep work, not painting skill.
Sheen guide: Flat/matte — ceilings and low-traffic walls. Eggshell — most living spaces. Satin — hallways, kids' rooms. Semi-gloss — trim, doors, bathrooms. Gloss — cabinets, furniture. Higher sheen = more durable but shows every imperfection.
From nail holes to fist-sized damage — there's a technique for every size.
Fill with lightweight spackling compound using your finger or a putty knife. Wipe smooth, let dry completely (30–60 min), sand lightly, prime, paint. Takes 5 minutes.
Use a self-adhesive mesh patch. Apply the mesh over the hole, cover with joint compound (apply thin layers — never thick), feather the edges out wide, let dry between coats (3 coats typical), sand smooth, prime, paint.
Cut out a clean square around the hole (use a drywall saw). Cut a new piece of drywall to fit. Install wood backers (1×3 strips) inside the wall on each side. Screw the patch to the backers. Tape the seams with drywall tape, apply joint compound in multiple thin coats.
Feather out joint compound 8–10 inches beyond the patch. The gradual taper is what makes repairs invisible. Too many beginners fill just the hole itself — the abrupt edge always shows through paint.
The HVAC, appliances, and systems that silently keep your home running — and what they need from you to keep working.
Most major home system failures are predictable and preventable. Set three annual reminders: (1) Spring — AC tune-up, check roof & gutters after winter; (2) Fall — furnace filter, drain exterior hose bibs before freeze; (3) Monthly — check smoke/CO detectors, inspect under sinks for moisture. Doing this consistently prevents 80% of expensive emergency repairs.
The #1 DIY maintenance task is also the simplest: changing the filter.
The 30-minute yearly tasks that double appliance lifespan.
Clean the filter monthly (twist out from the bottom, rinse under warm water). Run an empty hot cycle with a cup of white vinegar in the top rack quarterly to remove mineral buildup. Check the spray arm holes for food debris — use a toothpick to clear. Clean the door gasket with a damp cloth.
Clean the lint trap after every single load — a full lint trap is a fire hazard and increases drying time by 20–30%. Vacuum behind and beneath the dryer twice a year. Annually, disconnect the flex duct from the back and vacuum the entire exhaust run to the outside vent. Dryer duct fires cause 2,900 house fires annually in the US.
Vacuum the condenser coils (underneath or behind the fridge) twice a year — dust-covered coils make the compressor work 25% harder. Check door gaskets by closing the door on a piece of paper — if you can pull it out easily, the gasket is failing. Keep the fridge at 37°F and freezer at 0°F for optimal food safety and efficiency.
Run cold water before, during, and 15 seconds after use (cold solidifies grease for easier removal). Never put: fibrous vegetables (celery, artichokes), starchy foods (pasta, rice), grease, or bones. To clean and deodorise: run ice cubes and a handful of coarse salt, then a quartered lemon. If jammed, use the reset button on the bottom and the hex key slot to manually rotate the grinding plates.
The outside of your home takes the most abuse and gets inspected the least.
Security and weather-tightness basics that everyone overlooks.
Look at the strike plate (the metal plate on the door frame). If the latch bolt misses the hole, the door has shifted — common as homes settle. Mark where the latch hits with lipstick or chalk on the latch, close the door to transfer the mark, then file or chisel the strike plate hole to match. This fixes 90% of misaligned doors without replacing hardware.
Remove the hinge pins one at a time (tap out with a screwdriver and hammer), coat with petroleum jelly (Vaseline), reinstall. Takes 5 minutes. WD-40 works temporarily but evaporates — petroleum jelly lasts years.
Hold your hand or a stick of incense near window and door edges on a windy day to find air leaks. Replace worn weatherstripping on door edges (peel-and-stick foam is easiest; door sweeps seal the bottom gap). A well-sealed home can reduce heating/cooling costs by 15–30%.
When you move into a new home, change the locks (or have them rekeyed — cheaper). A locksmith can rekey a lock for ~$15–30; you change the pins to work with a new key without replacing the hardware. Buy a deadbolt that accepts grade 1 security (ANSI/BHMA Grade 1) — the strongest residential rating.
Prevention is vastly cheaper than remediation.
Large mould infestations (>10 sq ft) require professional remediation. Small spots on non-porous surfaces (tile, sealed concrete) are DIY-able. Mould in walls, insulation, or HVAC systems is not.