Several of the barrels I picked up second hand have busted bung staves. Darn it! When I topped up the wine in them they would weep wine around the wood with the hole in it. I called up Grochau and he had a few which I picked up. These ones are in much better shape. My pump kit has slowly took form. As you can see in the photo, I have a surge dampener clamped on to the output. That's the tall stainless tube. I'm testing the flow rate with my dinky little air compressor. 81 pounds per minute, as measured by the scale.