"Have fitted several of these over the years, Very simple two wire fitting, save a few bob on calling a tradesman, sorry! If used in conjunction with a decent Immersion heater timer switch you should get plenty of hot water in around 20 mins of running cost. Easy to replace and fit, just isolate the electric to the area first. I have replaced similar products on average every 18 months, contactors inside do seem to weld themselves over time. So can't comment on reliability of this unit. Worth the money, could easily save it's cost over a year with temperature tweaking and as I said before a good timer switch specific to the job."
"Bought this dual safety thermostate to replace existing burnt out one. These are very easy to install you need to turn off power supply to switch remove emmerstion heater top cover disconnect the two wires connected to thermostate and remove. Once out you need to measure the length so you purchase the right length.Fitting is the reverse of removal.Very pleased with purchase price and would recommend to anyone."
"I needed on of these for my hot water tank as the old one was not working and the hot water was getting very very hot to a point it could scald you. So looking at how to fit these couldn't be simpler if you can unscrew 2 wires you can fit one. just remember which wire goes where. the thermostat is well packaged in a strong tube it fitted my tank perfect and does the job"
"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."
"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."