Plumber or Drainage Engineer? Who to Call in the TW Area

Most people only find out that plumbers and drainage engineers are different trades at the worst possible moment: standing in a wet kitchen at eleven at night, phone in hand, not sure who to ring. The two trades overlap at the plughole and almost nowhere else, and calling the wrong one costs you a wasted call-out and another hour of water on the floor.

This guide gives you a quick way to decide, then tells you exactly who to call in the TW postcode area. We run both lines, so there is no wrong answer here, only a faster one.

The one-sentence test

Ask yourself which way the water is going.

• Water is coming in, down or out of a pipe that should be holding it (a leak, a burst, a drip, a boiler losing pressure, no hot water): that is a plumber.
• Water is refusing to go away (a sink, bath, toilet or outside gully that fills up, drains slowly, gurgles or backs up): that is a drainage engineer.

Clean water arriving where it should not be is a supply or heating problem. Dirty water failing to leave is a waste problem. The pipes, the tools and the people are different for each.

Call a plumber when

• A pipe has burst or is spraying, dripping or weeping.
• Water is coming through a ceiling, down a wall or up through a floor and the drains are running fine.
• The boiler is leaking, losing pressure or you have no heating or hot water.
• A tap, toilet cistern, radiator valve, stopcock or appliance connection is leaking.
• You can hear water running when everything is off, or your water bill has jumped.
• A toilet is overflowing from the cistern at the back, rather than the pan filling up.

For all of these, call us on 07360 268948. We answer around the clock and a local plumber comes to you.

Call a drainage engineer when

• A sink, bath or shower drains slowly or not at all, and clearing the trap has not fixed it.
• The toilet pan fills towards the rim when flushed and drains back down slowly.
• Flushing the toilet makes the bath or shower gurgle, or water appears in the shower tray.
• An outside gully or inspection chamber is overflowing, or there is standing water around a manhole.
• Drains smell, especially after rain, or you can see rats or drain flies.
• More than one fixture is backing up at once. That almost always means the main run, not the individual pipe.

For all of these, call our sister drainage firm Drainiacs on 07700 137648. They cover blocked drains, jetting, CCTV surveys and drain repairs across the TW area, and their blocked drains service page explains what a visit involves.

The grey areas, and how we handle them

A blocked sink or bath

A single slow sink is usually a plumber’s job: a trap full of hair or grease, cleared in minutes. If the blockage is beyond the trap, in the waste pipe inside the wall or the drain outside, it becomes a drainage job. A good plumber will tell you when they have reached that point rather than keep pushing.

Water coming up through the floor

If it is clean and constant, suspect a supply pipe or heating pipe leak: plumber. If it is grey or foul and appears after rain or after using the bathroom, it is drain water finding its way back: drainage engineer. If you genuinely cannot tell, describe the colour and the smell when you call and we will route it.

A toilet that is both leaking and blocked

Leaking at the base when flushed is usually a failed pan connector or seal: plumber. Filling to the rim and draining slowly is a blockage: drainage. Both at once is common on old soil stacks, and the fix is to clear the blockage first so the leak can be assessed dry.

Saniflo and macerator toilets

These sit on the boundary. A pump or motor fault is plumbing. An outlet pipe blocked with wipes is drainage. We cover the pump side in our Saniflo and macerator guide.

Why we run two numbers

Emergency Plumbers TW handles plumbing, leaks, heating and water damage. Drainiacs handles anything on the waste side from the gully outwards. Keeping the trades separate means the right van, with the right kit, turns up first time: a plumber does not carry a jetting unit, and a drainage engineer does not carry boiler parts.

If you ring the wrong one of us, you will not be charged for the confusion. We will pass you straight across. But if you use the test at the top of this page, you will get the right person on the first call, and in an emergency that is the hour that matters.

Still not sure?

Turn the water off at the stopcock if anything is actively leaking, stop using the fixtures if anything is backing up, and call 07360 268948. Tell us what you can see and smell. Routing you to the right trade is part of the job.