How often should I replace the water inlet hoses, and why?
Inlet hoses should be replaced after 5 years of use to reduce the risk of hose failure. You should also periodically inspect the hoses and replace them immediately if bulges, kinks, cuts, wear, or leaks are found. It is recommended to record the hose installation or replacement dates on the hoses for future reference.
From the official Whirlpool WFW9400SW00 Washing Machine manual, page 9
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