This hose is normally employed by Professional Fire Fighters. Covering can alternatively be incorporated in the reinforcement to give the hoses very low absorption of liquids and high resistance to abrasion and heat. Type 3 (Covered) Hoses to which an external elastomeric cover has been applied. ![]() This hose is normally employed in industrial hose systems. Type 2 (Coated) Hoses to which an external elastomeric coating has been applied to the reinforcement to give some protection against the absorption of liquids, and to improve resistance to abrasion of the reinforcement. Normally this hose is employed in fixed systems inside civil buildings. Most fire hydrants have two 2.5 inch hose connection outlets with 7.5 threads per inch (TPI) and one 4.5 inch-pumper connection outlet with 4 threads per. Type 1 (Uncoated) Hoses to which no external treatment has been applied to the reinforcement and are therefore liable to absorb liquids. The lining can be EPDM or thermoplastic elastomer. The yarn is made of high tenacity polyester. Numerous dry and wet barrel designs are available that meet stringent UL/FM requirements, some with maximum working pressures of 350psi. The hose jacket is a circular woven seamless reinforcement. As a critical piece of any emergency response system used to preserve lives and property, all Mueller fire hydrants are designed, built and tested to assure high performance, long life and dependability. Layflat hose is a hose with a soft wall which, when unpressurized internally, collapses to such an extent that the inner faces of the inside diameter make contact and the hose takes up a flat cross-sectional appearance while semirigid hose is a hose which maintains its round cross-section even when unpressurized.Įssentially the hose is produced with an external jacket and an impermeable lining. Hose can be layflat (employed either in fixed systems or used by Professional Fire Fighters) or semirigid (employed in fixed hose systems)
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