We sealed the scale strip between the clear plastic tube and the open copper pipe with a clear leak-tight sealer to maintain a closed water system inside ... A l/2 -in sweat to a 3/4-in NPT (National Pipe Thread) fitting (3) is soldered into the tee.
|Title||:||An instrument to measure stream channel gradient and profiles|
|Author||:||William J. Walkotten, Mason D. Bryant, Pacific Northwest Forest and Range Experiment Station (Portland, Or.), United States. Forest Service|