Hoses can wear from the
inside, out. Proper hose
inspection includes hose
interiors and exteriors.
If the tube cover separates
from the inner hose, it is
time to replace the hose.
Second, hoses fail from the outside, in. How
long a hose will last depends on its quality, what it
is used for, and if it remains outdoors year round.
For instance, a hose that remains straight will last
longer than one that has been folded and unfolded,
kinked and unkinked. A discharge hose continually
dragged on gravel or pavement without a plastic
cover will break down quicker than one protected
by a plastic coil or covering.
These external factors demonstrate why visual
and thorough inspections are so important. As
discussed earlier, the number of years of useful
life depends on what reinforcement materials
were used on the hose cover.
Remember, you should always follow manufacturer
recommendations for replacing hoses. For example,
manufacturers suggest when to replace anhydrous
ammonia hoses. Always follow such suggestions.
As a rule of thumb, replace clear and inexpensive
PVC tubing (sight gauges on tanks) each year.
Replace EVA hoses within two years. These are
inexpensive hoses that do not wear well in sunlight,
heat, and cold.
When clear hoses turn color, be safe and replace them.
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