glycol

Hi, I have a solar hot water system in my house (came with the house when i bought it) The pressure in the system is low and i want to top it up. (lower than shown in the attached picture) the system is filled with a glycol mix, so i would have to top up with that fluid. but i am wondering...

I'm house-sitting for a friend who's away for extended time, but we're in frequent contact. We're trying to determine whether or not his slab-heat residential boiler system has a leak (approx. 1,800 square ft). He recently had the zones drained (they were nearly or completely pure water) and...

Newbie looking for some help. I have an existing ground source heat pump installation which has worked fine for a number of years. I recently had a leak in my ground loops which I have now repaired but lost some fluid in the process so have topped up with water to get the system running. I have...