Having had no electrical work this past week I have been able to get on with a few things at home. Yesterday, that is Thursday as I write this, I was able to make a start on the central heating work, replacing the valves on seven radiators and altering some pipework. If my readers will remember I managed to do six of the radiators and as I had begun the work late in the day I stopped after three hours being as it was then time for my evening meal. After breakfast on Friday I completed the replacing of the radiator valves, a total of fourteen. There are actually thirteen radiators in total plus at the moment one tall towel rail. I replaced the valves on but seven of them for some were inaccessible and some didn’t require replacing anyway. I also installed two gate valves in the cellar room below the wet room so that I can connect a towel radiator/rail later without having to drain the system again. The heating pipes cover four floors and I know from memory that a plate manifold exists beneath E’s bedroom floor on the first floor. The reason I mention that is because when I began to refill the system it took an inordinately long time to fill. I have a feeling that air is still trapped in some of the pipes and probably in that manifold too. Slowly the radiators on the ground floor filled up but it took some time.The first floor radiators took much longer to fill, in fact twice as long. The bathroom towel rail is a problem and even now as I write this on Friday evening air is still trapped in the pipes despite my fitting a gate valve to manually vent it. Two of the five radiators on the first floor don’t appear to be totally free of air as yet also. There are three radiators on the top floor but two are not in use and were valved-off. The third hasn’t filled up as yet either. That radiator is in the room we recently redecorated and which is still waiting to have a new carpet laid when I get around to ordering one. Once the first two floors were just about free of air I switched on the pump for a time to encourage the air to escape. I’d had enough of going up and down the stairs venting radiators trying to find out why the system was taking so long to fill up so after five hours I packed it in and left it for another day. Things may have settled down in a day or two and the trapped air may have escaped but if not I shall have to investigate further. I may have to ‘force fill’ the pipes in order to expel any trapped air that isn’t caught in a radiator where it can be vented off easily. Incidentally our system is an open type one pipe system which means it isn’t pressurised and it is served by a header tank where it can expand and/or overflow if anything goes wrong. Don’t you just love plumbing? Don’t you remember from all my earlier posts about my plumbing escapades? I hate plumbing! Ha ha.