| The A●LOK PRIMARY PRECAST INVERT SYSTEM provides an economical and efficient method of manufacturing quality concrete inverts in precast concrete manholes. The system allows the bench and invert to be formed during the initial manufacturing of the base.
 The equipment consists of a cast “invert” plate which allows a 1” per foot slope across the bench to the channel. The channels are formed by inter-changeable fiberglass inserts that are “quick bolted” to the cast iron dome. The inserts are constructed of full ½” fiberglass and are gel coated outside to promote durability against the alkaline and abrasive nature of concrete. The hub areas of the insert are designed to facilitate match-ups between pipe and manhole channel inverts.
ADVANTAGES
- Easily adaptable to existing casting equipment.
- Similarity to standard set-up procedures makes the system
simple to use and time efficient.
- Eliminates labor, space and equipment necessary for
secondary pour.
- Helps control product damage by reducing in-plant handling
of the product.
- Provides a smooth uniform channel not obtainable by
secondary pour equipment.
- Compatible with boot or A•LOK pipe to manhole connections.
- Can decrease the amount of concrete poured in a base
compared to adding concrete with Secondary Invert Systems.
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