All Schedule 40 pipe is both hydrostatic tested and Eddy Current ND tested for reliability before it leaves the plant. Schedule 40 pipe can be furnished in either black or hot-dip galvanized finish. WLS is manufactured to standard O.D. dimensions and has a wall thickness that is just less than Schedule 40 but greater than Schedule 10. WLS may be joined by grooved or threaded fittings. This product meets the requirements set forth in NFPA 13 and is UL Listed and FM Approved.
WLS pipe is eddy current ND tested for reliability before it leaves the plant.
WLS pipe can be furnished either in a black or hot-dip galvanized finish at our Wheatland, PA facility. When hot-dip galvanized, WLS is FM Approved for use in dry system applications. WLS is the only threaded lightwall product that is hot-dip galvanized, UL listed and FM approved. Specify Wheatland quality pipe for the critical service life your sprinkler systems require.