The first block I received leaked during installation and a weak seam broke when I tried to push the knot further into the return line. However, they sent a replacement straight away and it works great which is why I give it 5 stars. This return moves more water than the ones I replaced. I love how compact the head is and how easy it is to adjust the direction of water flow. A few tips to keep it tight: Heat the return hose with a hair dryer for about a minute until it's soft and pliable. Use a small amount of lube on the backside assembly (yes I used THAT kind of lube - odorless of course). Installed straight away and sealed watertight. Much easier than applying force and stretching light plastic sutures.
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