Typical costs: Costs for complete installation of an encapsulation system start around $2,000-$4,000, average $5,000-$7,000 and can go as high as $8,000-$14,000 or more, depending on the size and condition of the crawlspace, local rates, and the materials used.
The Rc thread is a designation for BSPT (British Standard Pipe Taper). refers to the threaded end of a fitting or pipe which is 1/4 inch trade size (not actually 0.25 inches), and having British Standard Tapered Pipe threads.
A thread is a ridge of uniform section in the form of a helix on the internal or external surface of a cylinder (IFI description) or it could be described as a sloping plane curled around a cylinder. External threads are on bolts or screws. Internal threads are on nuts. There are many forms of threads but two types are in common use on fasteners. Machine Screw Threads - used on bolts, setscrews, machine screws and designed to mate with preformed threads in nuts or tapped holes.