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.
Understand some other nomenclature that sometimes goes with screw threads. Thread classes refer to fitting how loosely or tightly the screw fits in the nut. The most common thread classes are 2A or 2B. A indicates an external thread, such as on a screw or bolt. B indicates an internal thread, such as on a nut.