how do I price this up? flue comes out stone wall , right to the side of front door, around same level as top of lintel , so I need to fit a plume kit, never done one before , its a 42cdi , gas pipe is outside of property , need to run that for about 4m to the boiler . about 15 rads all piped up , nearly the worst piece of plumbing ive seen!! all skirting and everything finished, some pipes chased in behind them , heating is empty and untested!!!!!!! need to fit a condensate waste lime thing outside as plumber forgot to fit one, all area is slabbed up already! fit 2 new filters on incoming main, boiler all piped up except for gas & condensate, he wants a price for doing the gas , flue and condensate and commissioning & certificate, he understands I cant price on flushing & testing rads ect, ! how much??? I charge £20ph, these are the common rates down here for gas lads, so no comments with people saying 2k min ect! I really want this job as its for quite a decent building company , and his plumber has really pi**ed him off this time, so could be a lot more work for me! haha