What kind of oil should be used to lubricate fire hydrants to prevent rust? Please, expert!
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Dear HaiChuan users, as temperatures drop in winter in the north, water droplets form inside underground fire hydrants due to the cold weather, and some of these hydrants become rusty. May I ask you all, what kind of oil should be used for lubrication to prevent rust? Where is it refilled?
Anti-rust paint; asphalt can be used for underground applications. The exposed parts can be coated with butter.
The best method is to polish the bolts and nuts clean and paint them red； The second method is to use ordinary lithium-based grease, L-XBCHA3, and apply it to the exposed bolts and nuts.
Regular butter will do; just cover the exposed screw with a rubber hose