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Installed in a pipe termination hub for the prevention of vermin or debris from entering the piping system
Injection molded in non-toxic durable polypropylene (PP)
Normally used in the venting portion of the system only
Normally used in the drainage portion of the DWV system only
Hand tighten plus a half turn provides a complete seal
PTFE tape is recommended for threaded joints
Approved for both vertical and horizontal installations
Friction fit
Does not conduct heat like metal
Can be removed if necessary
Will not rust from acidic vent gases
More difficult to flash freeze than metal screens
No sharp edges, unlike metal screens