As other reviews have said it doesn't remove even remotely close to 500cc. It looks like the pipe is getting bigger at the top so it stops removing liquid around the 200-250cc mark. I tried replacing one of the o-rings with a spare I found on the bottom of the box with no better results. Poor (if any) quality control. This company does not test their products or read negative reviews or they would know about it. The suction tube is permanently kinked due to the packaging. There were no instructions included. Not even close to the money paid. I would not recommend this product or any other product from this company. I will return this product.
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