FAQ
Thread Sealants
FAQs
Q  How do I apply pipe joint compound?
A  Fill the male threads in a clockwise rotation following the direction of thread pattern, or brush across the 
threads as long as you ll the root of thread without completely covering the crest of thread. 
Q  Is Oatey White General Purpose thread seal tape safe to use on potable water lines?
A  Yes. All Oatey thread sealant tapes are safe to use with potable (drinking) water.
Q  Is Oatey White General Purpose thread seal tape safe to use on natural gas lines?
A  Yes. All Oatey thread sealant tapes will work on natural gas lines. Oatey does, however, recommend the 
use of yellow gas line thread tape with PTFE on all natural gas line installations, product #31403. The 
Oatey yellow gas line thread tape is approved by code for this application and the yellow color is a visual 
identier that the correct tape was used in the application. 
Q  Can Mega Bubble be used to locate leaks other than gas?
A  Yes. Mega Bubble will help you locate any non-liquid leaks and will not compromise the pipe/tting materials.
Q  What is the maximum pipe size you can use thread tape on?
A  There are no limitations on the diameter of the pipe. You should always wrap the tape enough times 
around the male threads in order to ll the spigot (female threads). Any pipe sizes over 1-1/4" with 
pressure and uids moving through it should have the male threads wrapped with tape and then the 
approved pipe joint compound spread over the tape.
Q  What pipe joint compounds are recommended for use in an approved piping system lled 
with natural gas?
A  The following Oatey pipe joint compound products are approved for use in this application: Oatey Great 
Blue, Hercules Block, Hercules Grrip, Hercules Megaloc, Hercules Pipe Joint Compound, Hercules Pro 
Dope or Hercules Real-Tuff are all safe for this application. 



