Toilet Flange

Testing

• Knockout on toilet flange is for testing, to seal the toilet hole.
• Or, you can get a toilet test plug - [1]
  • 4" plug - goes inside a pipe, or seals threads of cleanuot? [2]
  • Note - plugs typically seal inside of pipe. A spigot flange means it goes inside a 4" fitting, ie, the 4" spigot flange will have a size the same as OD of 4" pipe. But the ID of a spigot flange - will that be 4"? Hopefully - but cannot guarantee that a 4" plug will work with a 4" spigot.
• See description of various flange styles at bottom of page - hub or spigot or inside/outside pipe connection, either open (rework) or closed (for new construction + testing)

Types

• 4" Spigot - [3] - fits inside a 4" hub fitting - such as on a 4"-3" closet bend.
• 4" spigot closed (knockout) - [4]