FredT
Guest
If the interior of the housing can get wet without damage dump a packet of DRY unsweetend Kool-aid into the housing and close, then shake well. This coats the interior with the material in dust form, kind of a light gray color.
Now submerge the housing in a pool or tank where you can watch the thing closely. Wherever the Kool-aid first turns purple is your leak. The change is dramatic, obvious, and instant.
If it's at a seal you now know what to address. If it's at a fastener the housing is junk.
Rinse the housing in clean warm water until all the Kool-aid is removed, then dry well before inserting the camera.
O-rings as a rule leak more at low pressure gradients, it just takes longer to see. Housing cracks leak more as the pressure goes up.
Other dark flavors of Kool-aid work well, but the grape color change is most obvious. The "off brand" stuff works as well, but it generally isn't a finely ground as the real stuff, so it's harder to get an even coating inside the housing.
Now submerge the housing in a pool or tank where you can watch the thing closely. Wherever the Kool-aid first turns purple is your leak. The change is dramatic, obvious, and instant.
If it's at a seal you now know what to address. If it's at a fastener the housing is junk.
Rinse the housing in clean warm water until all the Kool-aid is removed, then dry well before inserting the camera.
O-rings as a rule leak more at low pressure gradients, it just takes longer to see. Housing cracks leak more as the pressure goes up.
Other dark flavors of Kool-aid work well, but the grape color change is most obvious. The "off brand" stuff works as well, but it generally isn't a finely ground as the real stuff, so it's harder to get an even coating inside the housing.