I wonder how many people bother about that! I'm also a "tighten by hand and give it a gentle nip with a spanner" diver. It never caused me any problems.[b said:Quote[/b] (Dominic @ April 07 2003,22:33)]However, in the Apeks servicing manual I'm absolutely not supposed to have, it says "Apply a torque wrench...to tighten each hose...to a torque measurement of 40 (+-5) inch-pounds.