Made of durable, corrosion-resistant composite material that is not subject to electrolysis, this valve is engineered to exceed ABYC and ISO standards.120° movement operates valve. Positive stops between positions.
Even when new it is hard to turn the nob (not really a handle) and gets stiffer with time. The matter is compounded when boat is bouncing in a seaway and one must use one hand to keep from falling. On the good side, the passage for the sewage is smooth and shouldn't clog. It would be great if the passage system could be kept and the operation made easy. But as it is I think it is unusable to me and many others.