I'm installing a water pressure gauge on my mobile home water system and the gauge will be on a stub end of the pipe (as opposed to mounted directly on or near a tee). I'm going to be mounting the gauge to the end of a 48" long pipe (the water line is below the mobile home and I want to be able to read the pressure from inside the home). How much do I need to be concerned about air in the line affecting the accuracy of the gauge? In other words, when I install the new stub pipe, should I try to fill the pipe with water as full as possible before I mount the gauge on it?

Is it within (standard irc) code to install washer/dryer in a bedroom not enclosed in a closet. I know gas dryers need X square feet of room and whatnot, but I can find no other code requirements for room placement. The closest thing I can find is for multifamily dwellings where a [i]shared[/i] laundry unit must be separate from living areas. But nothing about a private one. And of course people put laundry units in bedroom closets all the time. And yes... I've asked my local building department, they haven't gotten back to me yet. Looking for other opinions, in case I appeal their decision if I don't like it. apologies if this is the wrong subforum, I looked and looked but couldn't find one for siting washers/dryers and figured this was the closest.