Pipe trace heating cable UK: what to check before you buy
Updated: October 2026
A pipe that has already frozen, or one that runs along an outside wall and might, sends you into listings that pile length, watts and the words “self-regulating” into a single line. A pipe trace heating cable UK buyers can actually use is a shorter decision than that line suggests. You need the heated length of the pipe you measured, a supply that states 230 V, and a thermostat that sits on the pipe rather than a promise in the title. The ten amazon.co.uk rows behind this page are on the [pipe trace heating comparison](/hub/rods-and-pipes/pipe-trace-heating).
A pipe that has already frozen, or one that runs along an outside wall and might, sends you into listings that pile length, watts and the words “self-regulating” into a single line.
A pipe that has already frozen, or one that runs along an outside wall and might, sends you into listings that pile length, watts and the words “self-regulating” into a single line. A pipe trace heating cable UK buyers can actually use is a shorter decision than that line suggests. You need the heated length of the pipe you measured, a supply that states 230 V, and a thermostat that sits on the pipe rather than a promise in the title. The ten amazon.co.uk rows behind this page are on the pipe trace heating comparison.
Our top picks
| Badge | Product | Heated length | Supply | Thermostat | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  Elektra Elektra FreezeTec 3 m condensate pipe kit, 36 W | 3 m | 230 V | Built in | 8.3 | about £57.49 | View offer |
| Alternative |  Elektra Elektra FreezeTec 5 m condensate pipe kit, 60 W | 5 m | 230 V | Built in | 8.1 | about £66.49 | View offer |
| Best value |  heninhill heninhill 4 m pipe heating cable with thermostat | 4 m | n/a | 5°C on, 10°C off | 8.1 | about £29.99 | View offer |
On this page
What you are actually buying
The metre figure in the title is the heated length, when the listing is being straight with you. The cold lead that reaches the plug is separate, and on several of these cables it is short enough to matter. Across a shared 4.3 from 180 reviews, buyers of the heninhill 2 m, 4 m and 6 m cables call the plug lead ridiculously short and say they needed an extension because the heated section did not reach the pipe. That is one pool of reviews, not three tests.
Diameter and route come before any cable, which is what the condensate pipe trace heating page is for.
Voltage, plug and thermostat
Only the Elektra rows in this set state 230 V. The 3 m kit is 36 W and the 5 m kit is 60 W, both at 230 V and 50/60 Hz, with a built-in thermostat. Those captured files do not print a BS 1363 plug, so “230 V” is not the same sentence as “UK plug”. heninhill states neither voltage nor plug standard. Oumefar is AC 220 V. The 4 m silicone tape at £18.82 is AC 200 V. Spacnana’s size field says 220V.
The difference between a cable whose output falls as it warms and a tape that stays at a fixed load is the self-regulating versus constant-wattage page.
Watts per metre and the pipe
A higher wattage is not a safer frost cable. Legrand’s worked example keeps a plastic pipe near 10 W/m. Elektra’s listings state 12 W/m. heninhill states 25 W/m at 10°C, which is the listing’s rated output at that temperature, not a promise that every metre draws 25 W all night. Reviewers of that tape, 2.4 from 7, describe melted insulation and a melted pipe. On plastic, a line of heat needs aluminium foil under the lagging if it is going to spread.
Which of the ten rows matches that pattern is the best pipe heating cable page.
What it costs to run
Ofgem’s price cap for 1 October to 31 December 2026 is 26.32 p/kWh in England, Scotland and Wales. It is not the Northern Ireland rate, and it is not a meter reading from a cable on your wall. A stated 36 W draw, the Elektra 3 m title, is 0.036 kWh in an hour. At 26.32 p/kWh that is just under 1p an hour while the cable is actually on. The bill is set by how many of those hours the thermostat allows, not by the unit rate on its own.
What to check on the listing
Take five lines back to the comparison, in this order. Heated length against the pipe you measured, with the cold lead treated as extra. A stated 230 V supply, and a plug standard only if the title actually gives one. A thermostat, with the on and off temperatures if they are printed. Watts per metre, or total watts, read against a plastic pipe rather than as a bigger-is-better claim. Then the job itself: a condensate discharge is not a gutter and not a 10 m garden run.
Common questions
How long a cable do I need?
Measure the pipe that is actually exposed, including a valve you need to protect, and match the heated length to that run. The cold lead to the socket is not part of the heated figure. A 2 m heninhill cable at £25.99 has drawn complaints that the plug lead is too short, so the heated section never reached.
Is the length in the title the heated part or the lead?
Treat the title length as the heated part, and read the reviews for the lead. On the heninhill listings the shared reviews say the plug lead is ridiculously short and that buyers used an extension. If the socket is the other side of a wall, a short cold lead wastes a short heated cable. Do not assume the photo shows both.
Does it have to be 230 V with a UK plug?
For a UK socket, you want 230 V stated. In this set only the Elektra 3 m and 5 m kits state 230 V, and those files still do not print BS 1363. A UK plug in Kadimendium’s title does not add a voltage. Oumefar is AC 220 V, the 160 W tape is AC 200 V, and Spacnana’s size field says 220V.
Do I need a thermostat if it says self-regulating?
Yes, unless the maker of that exact cable shows you otherwise, and even then read the sheet. DEVI says output on DEVIpipeheat falls with temperature and never reaches zero, so a thermostat and a 30 mA RCD are still required. Oumefar and the 160 W tape tell you the thermostat is not included.
Is 12 W/m enough, or is 40 W/m better?
On plastic, a figure near 10–12 W/m is the pattern in Legrand’s example and in Elektra’s stated 12 W/m. heninhill’s 25 W/m at 10°C is a higher rated output at that temperature, not a better frost cable by default. Forty watts on Oumefar’s 1 m, or 160 W on a 4 m tape with no thermostat, is the range where reviewers of the 160 W listing describe a melted pipe.
What should I expect it to cost to run?
Using Ofgem’s 26.32 p/kWh cap for 1 October to 31 December 2026 in England, Scotland and Wales, a stated 36 W draw is just under 1p an hour while it is on. That is arithmetic, not a metered test, and it is not the Northern Ireland rate.
Related pages
Sources
Public UK sources and the amazon.co.uk listings in the research digest, checked on 15 October 2026. Shelf prices can change.
- HHIC installer guide: condensate pipe and trace heating (retrieved 15 October 2026)
- HHIC householder note: thawing a frozen condensate pipe (retrieved 15 October 2026)
- NBS: BS EN IEC/IEEE 62395-2:2026 (retrieved 15 October 2026)
- IET Part P FAQ (retrieved 15 October 2026)
- Planning Portal: electrical work and building regulations (retrieved 15 October 2026)
- Elektra FreezeTec heating cables (retrieved 15 October 2026)
- Ofgem: energy price cap, 1 October to 31 December 2026 (retrieved 15 October 2026)
- Baxi: how to prevent a boiler condensate pipe from freezing (retrieved 15 October 2026)
- Heat Trace Freezstop self-regulating cable (retrieved 15 October 2026)
- DEVI DEVIpipeheat 10 V3 (retrieved 15 October 2026)