marshian

Outstanding........................ Bravo

Adding to this - after just under a year of working perfectly I suddenly had an issue with the bathroom room temp - it was sitting at 16 deg C rather than the 20 to 21 that it normally was. Classic short circuit symptoms - only the bottom horizontal section was warm rest of the rad was cold (I'm running flow temps from 26 to 34 Max so rads are never what you would call hot). I isolated the rad and drained it down and looking from the opposite end to the diverter it was clear it had inverted and water was passing by. So I've piped it up TBOE like the rest of the normal rads and normal service has been resumed as far as bathroom temps are concerned. I don't like the visual appearance of a TBOE set up on a tall vertcal rad so I'll re-do the plumbing in the summer to hide the pipe behind the rad Having had the diverter failure I'll re-do the identical one in the ensuite as a "planned activity" rather than an activity provoked by Mrs Alien saying "it's bath night the bloody bathroom is freezing what are you going to do about it"

Gutted for you - good luck with removal and replacement - hope it goes perfectly

Yes

Good trick for pinch points for vented systems is to put a magnet against the copper pipework - if it sticks to the pipe then you've got a magnetite build up - how much you can't tell but you've definitely got an issue in that location

I had to do this a few years back when I air locked the boiler - it works quite well But if you aren't prepared with people at F&E tank and any bleed points it can get a bit damp

Well your water bill is gonna thank you even if the in laws and the fam don't

It's witchcraft - that's all you need to accept - once you accept that it's really easy to understand 😉 I set mine up to target a flow temp which resulted in my house being stable internally at 0 Deg C OAT (I started high and worked down - probably quicker to start low and work up but Mrs Alien was not keen on "freezing her ass off while I fecked around with the heating" (True statement) My slope target flow temp at 0 deg OAT ended up at 33 Deg C which in my case was 0.6 as a slope (with no level correction) Once you have the slope you can then fine tune the level All the level is doing is compensating for the fact that heat loss is proportional to temp differential - higher the difference between inside and outside the faster the heat loss example at -2.5 OAT and 21 deg inside the delta is 23.5 Deg C at 10 Deg OAT and 21 deg inside the delta is 11 Deg C So heat from inside moves slower to outside when the differential is lower so proportionally you need to put less heat in to cover for the escape because the escape is at a slower rate So at 10 deg OAT my target flow temp was 27 Deg C and the house over heated so I needed to drop the level to target 26 When I drop the to -3.0 on the level on a slope of 0.6 it changes the target temp at 0 Deg C OAT to 32 Deg (and I want 33) So I increase the slope to 0.7 and that gets me back to 33 Deg C at 0 deg C OAT Told you it's bloody witchcraft

1 - Good 2. What the heck is one of them - picture of the pump please or did you mean an auto bleed above the pump in the pipework somewhere? 3. Hmmm - we'll leave that one to one side for now

Sometimes it's easy to miss the obvious - I had a gate valve fall apart internally (cold feed to my loft tank - took me ages work out why the tank used to take bloody ages to fill up after a bath - only after a lot of trial an error and checks did I find it wasn't fully open) another reason why I bloody hate gate valves and why I replace them at the same time as a pump if they been a long time Good point well made If it's air locked there opening a drain under the boiler (if it has one might encourage the air to escape (or cracking the union on the ope of the boiler (more towels)

I'll get shot for suggesting this but.................... 1. You did open the isolation valves up after fitting the pump? 2. You did bleed the pump after fitting (centre screw loosen it to allow the air out - they don't pump air at all well 3. Are you sure the isolation valves actually opened I'll get me coat

Can you not glue the broken piece back on?

^ WHS even in the -6 we had in early Jan my flow temps didn't go above 38 Deg C and the house was comfortable All rads sized for 35 Deg C flow temp at -2.5 Deg C OAT and sized to meet the heat loss of each room at that temp

Bucket and towels Leave the spade for the beach

Yeah but they look a bit leaky!!! Perhaps that's just me!!!