Dave,

Due to a chafing problem, which I have now resolved, I would like to replace the two blue silicon tubes that come as standard with the 140L. Is there any specific Dia/Wall thickness I should use? Is the length of these tubes critical in any way, or do I just keep them as short as possible?

I notice that on my new DZ one of the tubes is so short that it was detached when I bought the engine; now connected, it would almost seem to restrict flow at the point where it is slipped over the nipple!

Your advice would be greatly appreciated.

Paul