Never had a prob with mine Kev only thing I did when I fitted the first one is check with truma that my water tank would take 30psi.Stick to 7.5lpm 20psi and you should be fine with the Shurflo, more pressure only saves minimal time but may stress any pipework designed for 7.5lpm/20psi
So do I but it's bloody noisy. Think I may refit the 20 on as it's quieter. It's nothing to do with rubbers though as I use the same mountings.I've just bought the 30 psi one to replace my old one it has a very good flow rate.