Review on 🐋 High-Performance Whale Inline Valve - Ideal for Suction or Discharge Lines - Enhanced Nitrile Material by Marcus Barlow

I have never fitted this valve as as you can see in the picture the valve is not closed as it comes from the factory. If there was a lot of pressure, the back pressure would be enough to close the valve and it would certainly slow the backflow, but my boat nearly sank due to the slow flow on the metal flapper valve that was supposed to replace the valve. I chose a vented hinge for the shower tray. The rest of the product looked good, at least on the outside. Both delivery and return were prompt.