The R Series Transformer Breathers that, are manufactured from UV stabilised poly-carbonate and available in three different sizes. The clear polycarbonate body allows for clear visibility of the indicating silica gel and enables users to check desiccant condition with ease. The unit is mounted from a ¾” female pipe thread connection at the top of the breather. This connection point is also used for filling and emptying the desiccant within the breather. Two-way, low pressure valves are fitted in the base of the breather to ensure that the atmospheric air enters the desiccant when a negative pressure differential occurs within the equipment being protected.