Fiberglass Hole Formers are available for manholes, straight wall structures, and for offset holes in lift stations and wet wells. Sizes from 8′′ to 56′′ diameters in a variety of wall thicknesses. Also available with high-strength magnets for convenient mounting to form cores.
Press-Seal Fiberglass Hole Formers are designed to make precise entry holes for pipe penetrations in concrete structures. Made with fiberglass cloth (rather than chop), they include heavy wood bracing and feature a smooth, low-taper surface for easy release.
For Standard Manholes
For Straight Wall Structures
Parallel Hole Formers
Magna-Former Magnetic Holding