APEX DESIGNS - RPV Rebuild KitLike anything with oil and seals, maintenance is required from time to time. What separates the Apex Designs Rapid Precision Valves from the imitations in the market is the ability to re build them if the seals become worn out due to dust, dirt, sand and pressure washing out your wheels. The RPV Seal Rebuild Kit is a handy thing to keep on board so you can easily replace the seals when you start to notice air leaks. Note: 99% of the time, air leaks