1. It is not a true suction hose as it cannot withstand a negative pressure. 2. Hard suction hose may also be used to connect a fire engine to a hydrant. 3. In 1950, Hoover introduced the Veriflex, which was the first rubberized suction hose in the industry. 4. The steady beeping of the heart monitor is accompanied by the gurgling of the suction hose . 5. Some very flexible hard suction hose uses a thin polyvinyl chloride cover with a polyvinyl chloride plastic helix. 6. Hard suction hose consists of multiple layers of rubber and woven fabric encapsulating an internal helix of steel wire. 7. Van der Heyden was also credited with an early version of a suction hose using wire to keep it rigid. 8. Since hard suction hose cannot be folded, it is typically mounted on the side of a fire engine, often opposite ground ladders. 9. Some models had the hard, suction hose fixed to the intake and curled up over the apparatus known as a squirrel tail engine. 10. In certain circumstances, it may be possible to use hard suction hose to draft from a hydrant with adequate water supply but a low flow rate.
