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Was the heat exchanger ok too? Are they cast or stainless? My boiler man is coming on Monday so I will have a chat and see what he thinks. I think the .06 jet is the way forward with regular checks for any damage. As an aside, I cannot believe how much better my flow rate is after 2...

Yes the pump is set to 3 and the Hot Water to the highest temp. The rads dont get any heat when its heating the hot water if the heating is off. fyi I have just fitted a water softener to my system so this will quickly de-scale the pipework. The system has been powerflushed too as I thought...

So it would apear yours is operating at 120% of its design spec, have you (or whoever services it) noticed any damage at all? I bet when this boiler was designed it was rated on the very safe side, so it may well be feesable to push the design spec by 20% with no damage. A bit like...

Well that is a good reference for us, so thanks for that. Is it possible to fit a different sized nozzle? and if so, do you know what the highest output nozzle that is available to fit this boiler?

The chap who services the boiler each year replaced it last March and he is very good, so I am assuming . . . (I know... never assume anything!) Good point tho and I will certainly check next month when he returns. Thanks.

Err, I don't get what you are on about, I have aspergers tho so that wont help . . . :(

Yes its a heatslave and the water stat is set to the highest temp. Both hot and cold flows are he same. It takes 15 to 20 mins to fill the big bath! because I have to slow the flow at the tap to maintain hot water temp. I want this fill time reduced by at least a third and I want a VERY POWERFUL...

The problem: A 2 Bed Bungalow, 300ltr Bath - Small 12/14 oil fired combi boiler that wont keep up with the hot water demand for the shower after about 2 minutes. A 15mm feed from outside main restricts the flow rate even though we have 3.5 bar water pressure from this main feed. Its 15mm...