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No form of dielectric isolation between 2 dissimilar metals. The cables are fine. Its the handle shaft and the housing corroding and bonding . Just oil the push pull handle shaft where it enters the housing. Amd gently twist shaft uup.and back with vice grips. It wlil Give . Keep lubed cleaned and manipulated frequently. Leave half open and lubed in storage visit frequently and and move valves. Shame on engineers who didn't consider some form of dielectric protection .
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