This is a 3kw, 16inch immersed length CESTB340 Incoloy Immersion Heater complete with combined (operating & safety cut-out) plug-in thermostat and is typically used within standard unvented domestic water cylinders.. Installed products will often carry the ThermTec brand which is owned and manufactured exclusively by Heatrod Elements in Manchester. The CESTB 340 can be used in all standard domestic water areas including normal use in hard water areas susceptible to limescale. If particularly aggressive water conditions are present or the duty/usage is higher than normal then we would recommend an equivalent product with titanium element which is the CESZB340.
This immersion heater is most commonly fitted with Cotherm TSE00187, TSR00014 and Thermowatt RTS-3 dual function thermostats – see our “Thermostats & Controls” section for more details and to purchase these products.
The CESTB-340 is designed to meet European Standards EN 60335-2-73:2003 +A1:06 + A2:09 used with EN 60335-1:2012 for the safety of electrical appliances that heat liquids for household and similar purposes. Testing has been carried out and the product approved by NEMKO – certificate available on request
Coltherm TSE or Thermawatt RTS-3, Cotherm TSE or Thermawatt RTS-3
FAQs for CESTB340
Q: Hello, i have a HE Tribune water cylinder and i have a small leak from the emersion heater. The heater is a ThermTec 2.75/3KW CESTB-340. can you get new seals for this or do they only come with a new heater?
Q: Can the immersion stat be replaced for the CESTB-340 2.75/3KW?
Because it looks like it is soldered onto the immersion heater. (I can't pull it out)
Q: I have a brand new CESTB 340 immersion heater on a Prostel cylinder and the plastic cover has been cracked. Is it possible to purchase just a replacement cover?
Q: Is there a gasket available separately for immersion heater CESTB-340?
Q: how can I lower the temperature of the heater it is a cestb 340, it has been set very high, regards bob
Q: This morning I had a CESTB340 fitted by a qualified plumber. I wish to know if there is a manufactures guarantee on the product and for how long does it last. I had a new domestic water heater (Tempest Stainless) fitted approximately 4 years ago which came as a unit with all things fitted. This plumber has charged me a little over £200 for supplying and fitting the CESTB340 unit ... I hope that the latest element lasts longer than the original.
Thanks, Peter Kennedy.
Q: Hi My daughter has a Manco Stainless Sterling steel water Cylinder. The label on the heater has Therm Tec Limitied, Immersion heater 2.75/3 kw 230/240 V 50hz Approved to EN80335.2.72.
It states the heater is fitted with a Safety Thermal Cut out, with instructions on how to reset.
There does not appear to be any part or serial number on the heater. Do you know how I can find out which replacement unit I require?
Q: Hi... is it possible to get spare caps for the ThermTec immersion heaters - I have two which have cracked and are therefore a bit dangerous? Thanks
Q: Hello - I have a Gold UnVented Direct 120Litre Stainless Steel Cylinder installed - and I am looking to replace the lower immersion element .. can you please advice on correct part - is it 14" or 16"?
The code on the part is CESTB-340?
after this product in 14inch?
do you have
I need a direct replacement for a Thermtec ADHTB-327
It had been badly wired and burned the wiring.
I believe the safety cut out and heater element can be replaced without having to drain the cylinder.....
I could not see one on your website. I need it on Site by Thursday
Q: Just checking a quotation - What would be the rough order of costs of supplying & fixing a slim-line CESTB340 litre domestic immersion heater rather than an "ordinary" 120 litre one.
Ive been asked to change a Thermtec Type HS immersion heater.
Ref: T11/HS. 2.75 - 3KW
Can you tell me what one from your range ill need to be compatible please?
I have a broken Thermatec Immersion Heater series AF,BF,CF,DF according to the instructions sheet. It is installed in the side of my tank about a 3rd of the way up the tank. Do you sell a replacement for this part as although its never been used it fails to work?
Q: Hi guys,
I have an Akvaterm heat store with a biomass heat source but also a Solar Array with an Immersun unit feeding the immersion.
The immersion is a BESTB 340, but after 18 months the safety appears to have become trigger happy. On biomass cycles the tank can hit 80 degrees, but generally that's when there is no sun. I'm having to reset the unit daily. Replacing is straightforward, but is there anything I can do to improve performance?
Q: My domestic heating boiler is fitted with 2 X CESTB340 immersion heaters fitted with Thermowatt RTS-3 3412173 (RTS Plus) thermostats. The bottom thermostat has cut out three times in the past two weeks. Can you suggest a cause and can you tell me please where on the thermostat the red pointer should be set to. There is a plus and minus with arrow in between and after the plus there is a single dot and then two dots with no numerical indicator of temperatures.
Q: Hello, I have a customer with a vented stainless steel cylinder with a top mounted immersion in an 1"3/4" boss. do you have a 27" immersion for this size tapping?
If you have a question about any of our products simply submit it and we'll get back to you as soon as we can. Alternatively just call us on 0161 727 3713 and we'll do our best to make sure you get the right part.