Embassy model ox 160c (how to increase pressure to 25lbs?)

morloff93

I suspect I may have a leave leak in the radiant floor heat. I need to increase pressure to see if it holds for a few days, but I am not sure how to increase the pressure in the system.

Jamie Hall

Do you have a reasonably reliable pressure gauge (I hope)? And can you valve off the expansion tank? And is there a manual feed valve bypass on the water feed?

If so, it's easy. Turn the system off. Close the valve to the expansion tank. While watching the pressure gauge like a hawk, crack open the manual feed valve and bring the pressure up to 25 psi (it's not going to take much water!!!!) and close the manual feed valve and watch the pressure. The pressure should hold at least briefly; if it goes up, the manual feed valve didn't close all the way and now you have a different problem...

Note the pressure. Go away for a while and come back and note the pressure. It shouldn't have dropped much, if not all.

kcopp

There should be a fill vale on the system.
Typically is a Watts 911s, 1156F.
It has a small lever on it. Lift it up and it will add system pressure

Jamie Hall

kcopp said:

There should be a fill vale on the system.
Typically is a Watts 911s, 1156F.
It has a small lever on it. Lift it up and it will add system pressure

True. That works, too -- but still, if you can, valve off the expansion tank as it's action will mask the pressure change, if any. Don't forget to drop the pressure back down when you're done... and reopen the expansion tank...