the question is a case study, is abouth health and safety at work
Taking the batteries out of the smoke detector. I wish they would make smoke detectors that could tell the difference between someone smoking a cigarette and a raging four alarm blaze especially when I'm trying to sleep at 3 in the god damn morning. Hey First Alert, There's a subtle difference between a Viet nam war style napalm drop and somebody in the next room lighting up a marlboro.
Do not wear absolute white or black colors, no crazy patterns or logos, or reflective materials like polyester and sequins, drink plenty of water 2 days before the shoot (retouching dry crackling lips is no fun, and costs extra). I'd suggest polo shirts or something plain and simple that doesn't take too much attention away from the most important things - you and your son. On the day of the shoot, only smile when you have to, because your mouth will quickly wear out.
Pipe Fitting types are; Threaded, Welded, Flanged, Mechanical Joints, push on, Gasket, depending on size, location, application and material of the pipe. You need to determine the above parameter to find the correct answer.