How to seal end cap on pvc pipe?

Question

I have made an underwater camera housing with PVC pipe, and i have a s***w cap on the end with an O ring, but it leaks water. Any ideas on how to create an airtight seal?

Answer 1

depends on the depth your using it at.. preasure will disstort the pvc and cause the oring to let water pass. best you check at a diving school their sure to be someone there that does underwater phography

dave c

Answer 2

silicon caulking

Answer 3

Use thread tape to wrap around the threading of the pvc pipe before s******g on the caps,this will help with the sealing.

Answer 4

EDIT

Teflon pipe thread tape is available at any hardware, Lowe's Walmart, etc.

You may also consider lubricating the O ring with a lithium based grease. It may be distorting with the twist to tighten.

Also, you might be over-tightening.

Also, wrap and overlap the seam with waterproof electrical tape. There are some which are (silicon) self-adherent  rubber, a little wider and thicker than the usual plastic types.