Universal Baffled Oil Catch Can with Breather Filter and Drain Valve 2 Ports (oulet inlet),150ml Billet Aluminum Oil Separator Catch Can Oil Reservoir Tank,4 Adapters/Screws/Washers Included,Black

Good quality part, works as designed.I purchased this for a natural gas backup generator. The PCV system produces a large amount of moisture. This is due to it spending its life outdoors with wildly fluctuating temperatures and humidity. In addition, water is a byproduct of combustion (more so with NG). Since the PCV system is critical for removing moisture and oil vapor from the crank case, I wanted to retain it as designed. Before adding this catch can, water was being sucked directly into the intake, resulting in random misfires or sudden dips in power. At first I thought there were other problems such as ignition coil, plugs, wires, fuel delivery, governor, valve adjustment, etc. Though process of elimination and accident, I discovered a measurable amount of water (and a little oil) in the PCV hoses. Adding this catch can solved the problem. I end up draining about 3oz of water per month just from weekly self tests, and this catch can (plus integral drain valve) makes it easy.I added a piece of stainless steel scrubbing pad to the bottom of the can to allow more water and oil vapor extra surface area to condense. Works like a charm.In most PCV systems, you want a closed system so that the intake can provide some draw to extract the vapors. Therefore I used the included threaded plug and o-ring on the top of the canister. I do not recommend using the included air filter to allow fresh air exchange. This will interrupt the natural ability for the intake to provide some draw to extract vapor. And may also throw off MAF readings if your engine is thusly equipped or designed for a closed circuit PCV. I also understand that there are exceptions and some open PCV systems may benefit by using the included filter. Be sure to understand how your PCV system works before proceeding.