Originally Posted by Brentf
I was just posting a general comment not directed to you but maybe I hit wrong button. I think B10 is an excuse for poor quality not a manufacturing spec unless it is for rotating equipment. Six sigma/Toyota way/ quality is cheaper no excuse for blank tank valves that are bad from the start
I was a SIX Sigma Black Belt II, before retiring from where I worked and B10 life is used in all phases of deigning products. Even your famous Toyota uses B10 life targets. If we did not use B10 life targets you could not afford your RV; believe me they would be will over a million dollars each!
Now how do you know that a waste tank valve is bad from the start? Did you use a Ishikawa Diagram to find the root cause of this failure? Failures can occur from many different issues; such as design, manufacturing, purchasing, assembly and end user introduced issues!
Now as I stated before there are only so many gate valve manufactures and they all try to build quality products, if they want to stay in business. It could come down to nothing more than an assembly issue where the cable is not routed correctly, thus causing the valve to fail! Without a root cause investigation we are all just blowing in the wind.