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4" Form-A-Space Collar

4" Form-A-Space Collar


4" Form-A-Space Collar is great for construction. It forms a 1/2" void around the pipe in a concrete slab. Place this foam collar over the pipe before pouring concrete to leave a space for the closet flange, drain, etc. to be installed. Simply "break" the collar to remove once the concrete is poured and easily install the flange or drain! 


  • Forms a 1/2" void around pipe in a concrete slab.
  • Eliminates chipping of concrete when closet flanges, drain, etc. must be installed over the pipe.
  • Made in the USA


  • 4"
  • Also available in 3"

Manufactured and assembled in the USA by Plastic Oddities, “Friend of the Plumber”. Quality Parts – since 1975.