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

Click here to see information on our delivery charges and times



Hopefully you won't need to return an item, however, if you do, it is our aim to make this as simple as possible. By following the guidance below you can help us to help you when a product is not what you expected, or is faulty. Your statutory rights are not affected by this guidance.


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€12.95 Incl. 20% VAT

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Dual Safety Thermostat 18" is rated 4.2 out of 5 by 53.
Rated 5 out of 5 by from Just the job I had a faulty thermostat on an immersion tank. I was able to find the one I wanted very easily on the Screwfix website. I did a click and collect, all very easy. The thermostat is better than the original as is has a better feel for setting up and also has a thermal reset. Very happy with this purchase.
Date published: 2017-08-02
Rated 1 out of 5 by from Be careful Be careful when ordering this one, the head of the thermostat is larger than many out there. I bought one to replace a failed unit and it physically wouldn't fit in the immersion heater,despite the immersion heater being one I got from here a couple of years ago. It fouls on the neutral connection post. Can't comment on how well it works as never had it working, it will be going back.
Date published: 2017-04-08
Rated 2 out of 5 by from 18* thermostat BEWARE - Larger control box above illustrated picture shows normal size control box (black). actual new stock the control box (blue) is much larger so check out old stat size first. I had to bend existing element connections to enable new fit. the reset is as before a small button but the max temp rating is now 70deg.
Date published: 2017-01-10
Rated 5 out of 5 by from Good Thermostat Easy to install works straight out of the box, Well made Thermostat.
Date published: 2016-12-20
Rated 5 out of 5 by from Easy install This was very easy to install and gives out good hot water.
Date published: 2016-12-16
Rated 5 out of 5 by from Easy to fit Used it to replace non functioning unit. Easy to swap over
Date published: 2016-12-04
Rated 5 out of 5 by from Immersion thermostat 18" Fitted to replace a faulty one. It fitted well, easy to wire using 2.5mm2 heat resistant cable.
Date published: 2016-11-30
Rated 4 out of 5 by from Worth the money, easy to fit Bought this to replace a previous failed unit (along with a new heatproof cable). Easy to fit, just a small screwdriver needed once the power has been isolated and the cover has been removed from the immersion heater. Needed to clear sufficient space above the immersion heater in order to remove the old and install this as it's replacement. The adjustment of the temperature was simple, the unit has markings and subdivisions every 5 degrees.
Date published: 2016-09-09
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