I purchased mine last week. They shorted me on pipe so I went to the hardware store and picked up a bunch of 1/2" pipe and fittings, that's when I discovered they're not standard 1/2" fittings (the Chinese writing on the fittings should have given it away). After some mods with a Dremel I finally assembled the piping, filled it with pellets and placed it in the sump. When I powered it up the pump wouldn't work properly, I realized at that time the pump inlet fitting wasn't lined up properly through the body and placed pressure on the impeller. After most of the day wasted on trial and error, I finally got it working without the bypass piping and valve. I kept it because it does work and it was the only product I found to fit in the tight space I had, but I certainly didn't get what I paid for. I sent an email to the manufacturer telling them how disappointed I was and I didn't even get a reply. I like the design and it does have the potential to be an excellent reactor but the product I purchased had poor quality control, as well as poor customer service on the part of the manufacturer. I would not recommend this product.
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