Dual Safety Thermostat 18" Product Code: 89445

Dual safety system prevents overheating problems.


Temperature range: 20-70°C. Not for use with Ariston immersion heaters.
Additional Information
Technical Specification
  • Brand : Unbranded
  • Product Length : 18 "
  • Product Type : Dual Safety Thermostat
  • Total Product Weight : 0.07 kg
  • Temperature Range : 20-70 °C
  • Pack Size : 1
  • Manufacturer Guarantee : 1 Year Guarantee
  • Pieces in Pack/Case : 1
Product Contents
Delivery & Returns


Standard delivery: €15

Free delivery on all orders over €70.00

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€13.95 Incl. 20% VAT

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Dual Safety Thermostat 18" is rated 3.9 out of 5 by 13.
Rated 5 out of 5 by from setup This came in a well packed cylinder tube, the controls on the top are easy to read and understand, The two terminals are easy to get to and the grub screws are just right. The unit itself was to replace an aging Thermostat and once power was switched on has run silently and faultless. In my opinion any one who has a basic knowledge of house hold electrics (which is live and which is neutral) then you can do this job.
Date published: 2014-07-03
Rated 5 out of 5 by from Duel safety stat 18 inch Excellent piece of kit, fitted a number of these units, a pleasure to work with.
Date published: 2014-01-24
Rated 5 out of 5 by from Excellent unit An excellent unit supplied in a stout cardboard tube, the perfect length to replace an old 18” unit. The probe end was about 0.3mm thinner than the original 5/16” (7.9mm) imperial thermostat, probably to ease insertion. The plastic head unit was slightly smaller than the original, so an easy fit. The only downside is the lack of any temperature scale markings, instead 7 graduations spread from '–' to '+'. Initially setting mine to 2 divisions below max (+) gave 50 degrees C. One division below max gave a more sensible 60 C. As others have said, Screwfix’s wide opening hours are a boon if you need to remove the old thermostat to identify its length before heading off for a replacement the same day.
Date published: 2013-11-24
Rated 5 out of 5 by from cylinder thermostat I replaced one of these as old one had become faulty. Seemed to work fine, it does have a screw dial with numbers indicating temperature so it can be set at the 65 degree normal temp
Date published: 2013-11-05
Rated 4 out of 5 by from Just the job Came very well packaged, was easy to fit and works well. Needs adjustment of the temperature control by trial and error - found optimum setting for our use (about 50C) a quarter way up from minimum.
Date published: 2013-09-19
Rated 5 out of 5 by from dual safety thermostat does what it says on the box .Dual safety easy to fit
Date published: 2013-09-11
Rated 1 out of 5 by from Unreliable Works OK for about 6 months then the poor contact material starts to weld when it switches off so the water temperature slowly drifts up over time until the safety trip cuts the power, no good turning the temp down, once the contacts have welded a few times it's all downhill, I've found the same problem with the immersion heater timer relay contacts, I think that most electrical items switchgear, however much you pay for them are made in the same factory, far far away.
Date published: 2013-08-29
Rated 4 out of 5 by from Good budget product I do repairs on rentals and have to keep an eye on costs so this product fits the bill as I carry both the 7" & 18" as spares
Date published: 2013-06-20
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