Life Span of Hose?

Life Span of Hoses To the OP.... If you focus the question specifically on coolant hoses, insights from Ski and others with mechanical backgrounds are quite reasonable. There is no absolute shelf life for hoses, and even with an average lifespan of about 10 years, the durability depends a lot on the hose's quality and the specific application. I've encountered molded hoses that remained in excellent condition for well over 10 years, whereas a straight hose that was bent for its application showed severe external cracking much sooner. Unless a hose comes with a tag indicating its lifespan, the best approach is to estimate and establish a preventative maintenance program that you're comfortable with. Personally, I replace short straight or molded hoses for coolant on a well-running Lehman every 10 years, keeping a closer eye on them once they reach 6 or 7 years. Even though my rebuild is around 7 years old, a molded hose that forms a "U" shape is deteriorating faster than a straight piece from the same original hose, so I’m replacing it while other hoses around it are fine for another 3 years. Others may think I'm waiting too long or laugh at my approach, but in general, major operating fleets aim to extend life cycles based on measurable factors rather than just time. Installing expensive equipment to measure vibration, temperature, etc., helps in extending component longevity and saving money, similar to oil analysis. Relying strictly on time is somewhat outdated—it might be the best available method, but realistically, inspecting and observing signs of further life or deterioration, as well as considering the application's criticality, isn’t all that difficult either. View Details Do Toilet Hoses Eventually Become Smell Permeable? On my relatively new-to-me, old boat, there is a persistent but faint "heads smell" that I have managed to eliminate in other boats through thorough cleaning. The hoses, which are the standard white rubbery/plastic type commonly sold in chandleries, are of unknown age and could easily be 15-20 years old. Can these types of head outlet pipes eventually become permeable to smells over time? The toilets are both Lavac’s, which I prefer, and it’s not the “first pump of the weekend” odor, as the toilets are in regular daily use. Any thoughts? Perhaps I should replace them despite the challenging task, given their long usage period. Link to MIC For more information, please visit marine sanitation hose.