Connecting a washing machine to the water supply yourself

What to check before you start

Look at what is already there. In most Tallinn panel flats built from the 1960s onwards, the bathroom or kitchen has a cold water pipe with a stopcock somewhere near floor level, sometimes with a tee already fitted for a washing machine, sometimes not. Older wooden houses in areas like Kalamaja or Nõmme are less predictable and may need an extra fitting bought specifically for the pipe diameter you find.

Check the machine's inlet hose and drain hose for damage before you do anything else, especially if you are reusing an old machine's hoses on a new connection. A hose with a cracked collar or a rusted mesh sleeve is not worth reconnecting, and a new one costs very little next to the risk of a flood while you are out.

Confirm where the water will shut off. If there is no separate stopcock for the machine, you need to know which valve controls that section of pipe, because you will be closing it more than once during the job.

Tools and materials you will need

The list below covers a standard installation into an existing tee or stopcock. If you need to fit a new tee onto a pipe that currently has none, add a self-piercing tap valve suited to your pipe's diameter and material, since copper, PEX and old steel pipes each take a different fitting.

Buy plumber's tape (PTFE) even if your fittings come with rubber washers already fitted, because a strip of tape on the thread is cheap insurance against a slow weep months later. A torch or phone light helps, since the connection point is often in a dark corner behind the machine.

• Adjustable spanner or a small set of spanners
• PTFE plumber's tape
• New inlet hose with rubber washers, if not already fitted
• Self-piercing tap or tee fitting, only if there is no existing connection point
• A towel or a shallow basin to catch drips
• A torch or phone light for awkward spaces
• Spirit level, if the machine also needs levelling

Steps for connecting the inlet hose

Close the stopcock fully and open a nearby tap briefly to release pressure in the pipe. Have a towel ready, since even a shut valve can leave a cupful of water in the fitting. If you are fitting a self-piercing tee for the first time, follow the manufacturer's instructions closely, since the piercing mechanism only works once and a mistake means buying a new fitting.

Screw the inlet hose onto the tap or tee by hand first, checking that it goes on straight before tightening further with a spanner. Rubber washers inside the hose collar do most of the sealing work, so the joint needs to be snug rather than forced. Over-tightening cracks plastic fittings and does not make the seal any better.

Connect the other end of the hose to the back of the machine in the same way, hand-tight then a careful quarter turn with the spanner. Check that the hose has no sharp kinks behind the machine, since a kinked hose restricts flow and puts strain on the fitting over time.

Fitting the drain hose correctly

The drain hose usually runs into a spigot on the sink's waste pipe, a dedicated standpipe, or occasionally straight over the edge of a sink or bath as a temporary measure. A proper spigot connection with a hose clip is worth doing rather than resting the hose loosely, because a hose that slips out during the spin cycle floods the floor before anyone notices.

Keep the drain hose's high point above the level of the machine's drum, typically by looping it up before it goes down into the waste pipe. This loop, sometimes built into the standpipe design, stops water siphoning back into the machine between cycles. Most manufacturers specify a height range in the manual, worth checking if yours differs from the standard setup.

Secure the hose with a jubilee clip or the clip supplied with the fitting, and make sure it is not pinched behind the machine when you push it back into place. A gentle curve, not a tight fold, keeps water flowing freely.

How to test for leaks before running the machine

Open the stopcock slowly rather than all at once, and watch every joint you touched, both at the wall and at the back of the machine, for at least a minute. A slow drip often takes a short while to show itself, so patience here saves a soaked cupboard later.

Run a short rinse or spin cycle with no clothes inside, and check the drain connection while the pump is actually pushing water through it, since a fitting can look fine dry and still weep under flow. Pull the machine out slightly if you can, so you can see behind it properly rather than guessing.

If everything stays dry through a full test cycle, push the machine back into position, taking care not to trap or kink either hose against the wall or the cabinet behind it.

When to stop and call a plumber

A joint that keeps weeping after you have retightened it once, sensibly, is telling you that the fitting itself does not match the pipe, or that the pipe thread is damaged and no amount of tape will fix it. Forcing a connection further at this point usually cracks something.

If you open the stopcock and get a spray or a jet rather than a controlled flow, close it again immediately and treat that as a job for a plumber rather than a DIY fix, since it points to a fault in the pipework itself rather than in the fitting you just installed. The same applies to old steel pipes that crumble or won't hold a thread when you try to fit a new tee.

Our plumbing service, from 45 € an hour, covers exactly this kind of connection when the existing pipework needs a proper fitting rather than a bolt-on tap, and our appliance installation service, from 55 € per job, covers the whole washing machine hook-up including levelling and the test run if you would rather hand the whole thing over.