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[thunder40]

Maybe. But it means you cant simply just go bigger or add more if you want to pump more water....

[thunder40]

I am just speculating but would have to think that the passage way that is not wide enough for divers to swim through with their tanks on is a limiting...

[thunder40]

This thread is a perfect example of how sometimes it's more important to know what you dont know than it is to know what you know.

It's...

[thunder40]

Have not seen them so no insight other than pointing out what you speak of must be concrete slabs. Cement is a powder.

It's a pet pea...