... as long lifetime, stability, less abrasion, corrosion-resistant, non-polluting, quick wa 3/4" DN20E float valve with plastic ball and plastic ... in any angles(High temperature ,material requests, strong acid and alkali need to customize.) float valve can be widely used ... tank, cistern, cooling tower,air cooler, gardening, animal husbandry and other water equipment. it's not only popular in China ...