The POLYFORM® Sub Flowsafe is made from a rotomolded PE outer shell and filled with polyurethane (PUR) foam, guaranteeing a compressive strength of 500 mH2O. The Sub Flowsafe series are equipped with stainless steel hinge and clamp. All steel parts are placed within the outer diameter of the complete float. A synthetic rubber gasket locks the Sub Flowsafe in position. Fitted onto a hose with a distance of 25mm, the internal profile of the Sub Flowsafe still allows winding the hose with clamps mounted to a drum with diameter of 1,8m.