Plastic washers really are a pain—I've had them warp or crack, especially if I overtighten. I started switching to silicone washers where I can, and t...

I hear you on the interconnectedness—HVAC is definitely a “whole system” thing. Still, I wouldn’t write off return vents so quickly, especially in old...

Grease pencils do smudge a bit, especially if you’re working in tight spaces or if the pipes get damp. I’ve found they last longer than Sharpie, but n...