Bob Korves wrote:
The original orange PIK ballast tanks are made of a multi layer
fabric.
The water gets between the layers and cannot really be patched
successfully. At least I was not able to do it. I would patch the obvious
hole and then it would leak somewhere else. Patch that and it would leak
somewhere else yet! You may have better luck than I had...

I'd second that assessment. You can get various types of internal leaks
that cause the water to sit between layers and into that extra bladder
that seems to be built into the root end. Seems to be aimed at keeping
partial loads from shifting around too much. YOu end up with
un-dumpable water and uneven loads. But they look so nice and are so
nicely engineered, I just threw mine out a month ago - from UH's old PIK
circa early 80s. Thanks Hank.