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Phill Peck
Guess these guys who think a combi swap cant be done in day are the guys who take 2 hours to service a back boiler /half hour to remove and replace rad valve on a drained system etc etc.
Stop fa#nnying around drinking tea and actually get on with the job f##k me its 4 screws and alter 6 pipes that are just where your working and add a bit of plastic.
A 500 quid boiler is no harder to fit than a 1000 quid one
So you don't flush to BS7593 then (and I'm not saying powerflush)
"bit of plastic" condense can be very difficult to get out in some situations
Ok so if you want to and your not bothered about the job then maybe you can fit one in a day. But I have never done a boiler swap without a powerflush or upgrading controls etc
Maybe I don't work as fast as you but I take pride in my work which takes time
The average boiler swap for will include
Changing trvs and lock shields
Powerflush
Remove boiler
Fit boiler
Fit new controls
Pipe up (neatly using clips and a level)
Run condenses to wherever practical
Hot flush
Inhibitor
Commission
Sorry just can't do that in a day