Hi, I’d like to replace the standard radiator and the TRV in my bathroom with a towel radiator. I’d like to have a go at doing this myself as a bit of a learning exercise and was wondering if anyone had any tips? I’ve read through this guide (the “Changing an Old for a New TRV” section half way down the page). This guide is only for switching a TRV, but I assume the process is the same if I’m switching the radiator at the same time? Re-pressurising the system is the bit that is a bit daunting (boilers are expensive and I don’t want to break anything!), but looking at this guide it looks fairly simple. Couple of questions: 1) In the guide it only mentions draining the nearest radiator. Do I not need to do all the radiators? The radiator is upstairs and the combi boiler is downstairs, so I guess if I drain one radiator upstairs it should drain all water from upstairs hence only needing to do the one? In case it matters, the heating is connected by flexi-pipes that run through the ground floor roof and either drop down to the ground floor rads, or go up to the 1st floor rads. 2) The last step mentions adding inhibitor to the system. We had some radiators moved this time last year and he added some inhibitor at the time. Would I still need to add a fresh round of inhibitor this time? I’m guessing so as it would come out when the system is drained? 3) If the answer to 2 is yes, I was planning to put it in via the top of either the new or another existing towel radiators as I’ve read they’re easiest to access. How much are you supposed to put in? Thanks for any help.