An old towel radiator that leaks at the joints, gives off hardly any heat or just looks out of place after a bathroom renovation — replacing it fixes all 3 issues. But this is not a job where you simply unscrew the old unit and fasten a new one in place: the riser has to be shut off, the old radiator removed carefully, the pipes and threads checked, and the new unit connected with the right centre-to-centre distance and tight, dry joints. In buildings on Praga, flats on Wola, new blocks on Ursynow — each property has its own pipe arrangement. If you do not want to risk flooding the neighbours while changing it, call a professional.

How much does replacement cost

The price depends on the kind of old and new radiator, the state of the pipes and threaded joints, whether the pipework has to be altered, and how hard the old unit is to take off. If the old radiator is welded to the pipes or the pipes are hidden in the wall, the work takes more time. If the new unit has a different centre-to-centre distance than the old one, adaptors or pipe changes will be needed. Current prices for all bathroom work are in the table below. Removal and brackets are included in the replacement price; the new radiator and fittings are provided by the client.

How the replacement works

1. Inspection: we check the old unit’s connection type (threaded or welded), the pipe condition, and the new radiator’s centre-to-centre distance.
2. Shutting off the water: we close the isolation valves. If there are none, we shut off the riser (arranged with building management).
3. Draining: we drain the radiator and feed pipes.
4. Removing the old unit: we undo the connections and lift it off the brackets. If it is welded, we cut it free with an angle grinder.
5. Pipe check: we inspect the threads and pipes for corrosion. If the threads are damaged, we cut new ones or install press fittings.
6. Fitting the new radiator: we install brackets (re-drilling if needed), hang the unit, connect the pipe tails, and tighten each joint with proper sealing.
7. Testing: we turn the water back on, bleed the air through the bleed valve, and check every connection for leaks.

Common mistakes during replacement

• Failing to check the centre-to-centre distance before buying — the new unit does not line up with the existing pipe outlets.
• Using the old valves and fittings again — they are already worn and begin to drip after a few weeks.
• Not shutting the riser off completely — water pours out once the connections are undone.
• Using sealant paste instead of PTFE tape or hemp on threaded joints — the seal gives up over time.
• No bleed valve on the new radiator — an air lock stops circulation.
• Mounting on old brackets that do not fit — the unit hangs crooked, putting strain on the joints.
• Cutting off the old radiator and leaving pipe stubs too short for re-threading.

Important: replacing a hydronic towel radiator means working on a pressurised heating or hot-water system. One badly sealed joint will leak as soon as the water is turned back on. If you do not have plumbing experience, call a professional.

What to prepare before the visit

• Buy the new radiator — measure the old unit’s centre-to-centre distance (between pipe-tail centres).
• Confirm the connection type: side, bottom or diagonal — the new one must connect the same way or adaptors will be required.
• Buy isolation valves, a bleed valve and union connectors — the technician will advise you if you are not sure.
• Arrange riser shutdown with building management if there are no isolation valves.
• Prepare a basin and cloths — some residual water will spill when the old unit is disconnected.
• Clear the space around the radiator — we need access to the pipes and brackets.
• If the wall is tiled and the new brackets do not line up with the old holes, new drilling will be needed.
• Check the pipe material (steel, copper, polypropylene) — this affects how the radiator is connected.

A real case from Warsaw

We were called to a flat on Praga Poludnie. The bathroom had an old steel coil radiator — rusted, one joint dripping, green marks on the pipes. The owners had bought a new chrome ladder-style radiator, but the centre-to-centre distance was 5 cm off. We shut down the riser and drained the system. The old coil was welded in place, so we cut it off with an angle grinder. We cut new threads on the pipe stubs and fitted eccentric connectors to make up the 5 cm difference. Isolation valves and unions were installed, and the new radiator was hung and connected. Water on, air bled — the unit warmed up within a minute and every joint stayed dry. The work took about 3 hours, including arranging the riser shutdown (compatible with Grohe, Hansgrohe, Geberit and similar).

Frequently asked questions

Book the replacement

We replace towel radiators across Warsaw — we take out the old unit, prepare the pipes, and install the new one with a full leak check. We work with hydronic, electric and dual-fuel models. Brackets included. Get in touch and we will come and replace it.