Well, to be honest I don’t remember even looking at the static pressure. I would guess that it would be higher than 11.5”. I don’t really consider the static pressure to be significant unless you’re doing a leak check of the system. The regulator needs to have some load on it to regulate.
But, you’re in luck. I didn’t want to spend another day up on a ladder painting the house, so I gave myself the day off (I can do that since I’m the boss of just darn near everything around here, at least while SWMBO is at work). :B
It’s been almost a year since I replaced the LP regulator, and bought the digital manometer, so it was probably a good idea to check it again. As I said in the topic I linked to, the test port plug at the fridge is frozen and I can’t remove it. I twisted an Allen wrench into a pretzel last year trying to get it out and it never budged. After finding that the valve it’s part of cost $150, I quit trying to get it out.
This is the pressure with the fridge, furnace, water heater, and the generator running. I had the generator loaded about 50% using an electric heater. The pressure is about the same with the furnace off, and the AC loading the generator. The displayed pressure is actually bouncing around +/- .1 or so, but I tried to adjust the regulator so that most of the time it was above 11.5”.
And this is the pressure with nothing but the fridge running. Again, this is at the regulator. It might show slightly lower, and with less fluctuations if I could check it at the fridge. That’s less than one ounce per square inch difference between the two numbers.
Edit: Being an unapologetic OCD kind of guy, I started wondering if maybe I was checking and adjusting the LP pressure with too much load on the system. After all, the generator and furnace are both gas hogs compared to the other LP appliances. So, I rechecked things with the generator off, but all the other LP appliances running. The readings were virtually identical. In order to maintain 11.5” h2o with the furnace, WH, stove/oven and fridge going, the regulator had to be adjusted such that the pressure rose to about 12.7-12.9” h2o with just the fridge running. It is what it is, I guess.
:):)
