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Advice regarding Tado system bypass

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9 Nov 2025
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Hi,

I checked through the forums and found some useful bits but nothing quite answering what it is I'd appreciate some help with. Forgive any errors, I'm not at all clued up with plumbing related things.

We (gratefully) inherited a full Tado system installed by the previous homeowner. However, they installed the system on ALL radiators, not leaving one as a bypass. Our boiler is not a modern version with a bypass. This has been the case for approximately 3 years or so (all radiators functioning via Tado without a bypass). Our boiler is around 10 years old in total.

Recently we had our boiler serviced, and the plumber notified us of the need for a bypass and offered to install a bypass for us for around 200 pounds. I would love some tips on which of the following routes you might advise we should best take:


1) Ignore the situation and continue with it as it is due to the age of the boiler already. Then when the boiler gives up we get a more modern one with a bypass in-built. Save money on any fixes and spend it here instead.

2) Pay to install a bypass for this.

3) Adjust one of the Tado valves back to an 'old' style one which we can use as a manual bypass. Is this a complicated fix or something we could manage ourselves with decent DYI skills but no plumbing experience?

4) Is there perhaps a way in which we could do something within the Tado system? E.g. something like scheduling one radiator to come on at set times etc. I assume this doesn't work because then we are actually just creating more of an issue by having the radiator come on and off via the Tado which would just leave the same issue with the boiler.


Very grateful for any tips or advice - cheers!
 
If you want to have a bypass radiator then the simplest option is to remove one tado trv and replace it with a conventional trv and leave it on 5.

If you have the tado wall thermostat then the radiator in which ever room the wall stat lives shouldn't have a tado trv on it anyway otherwise it will compete with the wall stat.
 

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