KLook wrote:LOL, I have put 260 degree water through mine! (Wood boiler overrun.....wood sucks) I don't recommend it but it wont melt those lines! I adjusted my Harman to put out 210 degree water in super cold weather. Its still working and so is the one inch pex to my cast iron radiators.
KLook wrote:Check your pipe and let better heads then me advise you on that. That is just my experience.
windyhill4.2 wrote:I'm a big fan of deeper is better if water table is not an issue,getting heat pipes below the frost line is good !! dchartt you have to read all the print on your pex ,you are probably only running 15 psi max which raises the temp allowed thru ,we run 180-190* thru ours all the time--7+ yrs.,no melt down yet.Question is , is the coalgun up to maintaining the water temp.,or do you need more temp in the house?,you could get lots more btu from hotter water if the boiler can maintain the water temp.