Viking Johnson’s ductile iron FlexLock pipe couplings are available in sizes 2 1/2" - 12" NB, this includes two ranges, one to suit ductile iron pipe and a second for steel pipe. All FlexLock pipe couplings are suitable for use with plain ended pipe or tube and are black Rilsan (nylon 11) coated with Sheraplex coated nuts & bolts for impact, corrosion and chemical resistance.
These pipe couplings all include unique EPDM rubber seals with stainless steel load-bearing teeth, this provides a fully end-load restraining joint. FlexLock, like other VJ products, allow angular deflection to accommodate pipeline movement, this also allows gentle curves to be created without needing thrust blocks. PN16 rated in sizes up to 8” NB, larger sizes are PN10 rated.