PEARL - STEEL TANKS - MNP - Tanks ( Inline ) • The MNP Steel Series tanks are ideally suited for a wide range of applications, including boosting systems, irrigation systems and hydraulic hammer arresting. • The MNP Steel Series In Line Tanks are made of virgin polypropylene liner combined with FDA approved high grade chlorobutyl diaphragm. • This is held against the wall of the tank with a steel clench ring. • The brass air valve, sealed by a threaded o ring valve cap, prevent air leaks. • On the exterior, the almond colored two part polyurethane paint finish over an epoxy undercoating provides hundreds of hours of UV and salt spray protection. Standard Features • Single chlorobutyl diaphragm • Patented stainless steel water connection • Virgin polypropylene liner • Two part polyurethane, epoxy primed paint finish • Leak free, O-ring sealed air valve cap • No maintenance