I installed an exhaust muffler a while back to reduce automatic compressor draining in the shop. They get dirty over time and need to be cleaned or replaced. Buy several when you buy them to get started. I received these 1/4" NPT mufflers however they were not 3 slotted as pictured. What I received only has 2 slots per axial position and they are only 2/3 shorter in length.
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