On Sat, 23 Jun 2007 21:17:37 CST, Kurt
wrote:

I've often wondered about all this. My 1200 GPH MagDrive pump has
basicallly a 1/2 or so stock nozzle (if I remember) I've got it stepped
up to 1" tubing to the filter. The pump was designed for 1/2 tubing.
Aren't they all at this size?

By brand maybe, but I've replaced pumps and had to change sizes
because of the brand.

Regards,

Hal