Plumbing Warning Signs: Which Ones Mean Call Now

Every plumbing warning sign list online has the same problem. It gives you eight things to watch for and no idea which one matters on a Tuesday night. A dripping tap and a smell of gas are not the same kind of problem.

Sort them by urgency instead. Three categories, and the category decides whether you are making a phone call now, this week, or the next time someone is under the sink anyway.

Category one: act now

These are not warning signs. They are the event.

• Water where it should not be. A ceiling stain that is spreading, water pooling under a cabinet, or a wall that feels damp to the touch. Water is already somewhere it is not supposed to be, and every hour adds to the repair bill.
• Sewage backing up. Anything other than clean water coming up through a drain is a health matter, not a maintenance one.
• No water at all. A failed main or a broken supply line. Turn the water off at the meter if you can find it, then call someone.
• Gas. If you can smell gas or hear it escaping, do not troubleshoot. Do not flick a switch. Get everyone out, leave the door open behind you, and call your gas distributor or emergency services from outside. Here is how a gas leak announces itself, and it is worth reading before you ever need it.

The full list of what counts as an emergency, and what to do while you wait, is worth having in your head rather than your bookmarks.

Category two: book someone this week

• The same drain blocking again. Once is an accident. Twice in a few months means something is collecting in the pipe, and a rodding will not fix the cause.
• A water bill that has moved for no reason. Nobody in the house changed how they use water, and the bill is up. That is the single most useful signal a household gets, and it usually means a leak you cannot see.
• Damp, mould or a musty smell that keeps returning. Cleaning it does not treat it. Mould comes back because the moisture is still coming from somewhere.
• Hot water that has become unreliable. Longer waits, less of it, or a temperature that swings. The unit is telling you something before it stops altogether.
• Low pressure in one tap only. A whole-house problem is usually the supply. One tap is usually the fixture or the line feeding it, and it is cheaper to sort out now.
• Water pooling in the yard or the garden beds after rain has stopped. That is a stormwater or drainage problem, and it is doing slow damage to the foundations and the garden.

Category three: watch it, and be honest about watching it

A tap that drips. A toilet that runs quietly for a few seconds after it fills. A gully trap that smells in summer. None of these need a same-day call. All of them get worse, and they get more expensive at the point where they stop being small.

The honest version of “I will deal with it later” is that later costs more. Not dramatically. Just more.

The two things to stop doing

The first is chemical drain cleaner. It is caustic, it can damage older pipework and joints, and it is genuinely unpleasant to work with if it splashes. It also treats the symptom. A recurring blockage has a cause, and the cause is a camera job, not a bottle.

The second is plunging something you have already plunged three times. If the water is not moving, stop. You are more likely to break a joint than clear the line, and a broken joint inside a wall is a different category of problem entirely.

How often to have the system looked at

Nothing in a house requires an annual plumbing inspection by law, which is why most people only see a plumber when something has failed. For an older house, or one with mature trees near the lines, a check every couple of years is cheap insurance. Ask for the drainage lines to be looked at, not just the visible fixtures, and ask what condition the pipes are in rather than whether they are working today.

If that produces a recommendation, get it in writing with a price, and get a second one before you agree. The questions worth asking before anyone starts are covered here, and none of them are rude.

What to do with a warning sign

Put it in a category, then do the thing the category asks for. Nothing on this list is a reason to panic, and nothing on it improves with another month of hoping. The difference between a repair and a renovation is usually just the date you picked up the phone.

Sources: the health and safety advice on gas leaks, including the instruction to avoid switches and to call from outside the property, follows the guidance published by Australian energy distributors and state safety regulators; the caution on chemical drain cleaners reflects the warnings carried on those products and by plumbing industry bodies.