Fiberglass Hole Formers

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.

Category: Inserts, Hole Formers, Grout

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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.

Round Manholes

Available in diameters from 8” to 56” (200 – 1422 mm).
Manhole ID’s of 36”, 48”, 60”, 72”, and 96” (900, 1200, 1500, 1800, 2400 mm).
Manhole wall thicknesses of 4”, 5”, 6”, 7”, and 8” (100, 125, 150, 175, 200 mm).
Special wall thickness is also available.

Straight Walls

Available in diameters from 8” to 56” (200 – 1422 mm).
3” to 8” wall thickness (standard). (75 – 200 mm).

Parallel Hole Formers

Provides parallel 8” diameter or 11” diameter holes (200 mm and 275 mm)
Standard 26.25” center-to-center spacing (667 mm)
Available for 48”, 60”, 72”, 84” and 96” ID structures (1200, 1500, 1800, 2100, 2400 mm) such as wet wells, lift stations, pump stations, etc.

Fiberglass parallel hole formers

For Standard Manholes

Available in diameters from 8” to 56” (200 – 1422 mm).
Manhole ID’s of 36”, 48”, 60”, 72”, and 96” (900, 1200, 1500, 1800, 2400 mm).
Manhole wall thicknesses of 4”, 5”, 6”, 7”, and 8” (100, 125, 150, 175, 200 mm).
Special wall thickness is also available.

For Straight Wall Structures

Available in diameters from 8” to 56” (200 – 1422 mm).
3” to 8” wall thickness (standard). (75 – 200 mm).

Parallel Hole Formers

Provides parallel 8” dia. or 11” dia.holes (200 mm and 275 mm).
Standard 26.25” center-to-center spacing (667 mm).
Available for 48”, 60”, 72”, 84” and 96” ID structures (1200, 1500, 1800, 2100, 2400 mm), such as wet wells, lift stations, pump stations, etc.

Magna-Former Magnetic Holding