Tylox® WT+, WT and ST Cast-in Connectors

These cast-in, pipe-to-manhole connectors feature an innovative design that saves construction time and money, replacing mortared connections made at the jobsite. With these connectors cast-in at the manufacturing facility, concrete structures arrive onsite ready to go. The push-fit connection requires no special tools, creating a watertight seal that can be immediately backfilled.

Where Cast-In Connectors Make Sense

Cast-in connectors are a solid fit for precast structures that need to stay watertight for the long haul. You’ll find them in sanitary and storm systems, utility vaults, and other below-grade setups where the connector is built right into the concrete. That built-in approach cuts down on install time and keeps alignment consistent, even with different pipe types like PVC, clay or concrete.

If your job calls for ASTM C923 compliance and reliable performance from the start, cast-in concrete pipe connectors are a smart way to get there.

Why Cast-In Over Other Options?

Compared to mortared connections, cast-in connectors offer a cleaner, more reliable seal right out of the form. There’s no need to core after the pour or wrestle with field-fit gaskets—the connection is ready when you are. That means fewer steps, less mess, and less room for error. For crews aiming to keep projects on schedule and inspections smooth, cast-in connectors help take one more variable off the table.

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Product Benefits

Meeting ASTM C923 and BNQ 2622-420 specifications 
Smooth high-strength splicing 
Suitable for all types and sizes of connecting pipes 
Standard and oil-resistant versions are available 
Save construction time and money due to simple push-fit connection. No special tools needed. Ready for immediate backfilling.

Using Tylox® cast-in connectors means that the structure arrives onsite ready for the pipe, saving time and money during installation. The tight seal between the pipe and the structure  protects the environment by reducing the potential for groundwater contamination.

Our premium Tylox WT+ cast-in connectors come with unique “fold pockets” that reduce insertion forces and provide a guide for concrete placement. The textured embedment foot of the WT+ allows for increased contact between the concrete and the rubber and enhances its water stop capabilities.

Tylox connector mandrel secured to the core of the formwork

Tylox connector installed in the mandrel used to cast it into a concrete manhole

Tylox® WT+, WT and ST cast-in connectors are manufactured from synthetic rubber compounds to meet the material and testing requirements of ASTM C923. These connectors are also available in an oil-resistant rubber, identified by an orange dot on the rubber molding. Other materials to meet different specifications or project requirements may be available.

Pressure Rating

All Tylox® WT and WT+ sizes have been tested to 13 psig (90 kPa) watertight sealing in straight alignment and 10 psig (69 kPa) watertight sealing at 7° axial deflection. The Tylox ST cast-in connectors have been tested to 6 psig (41 kPa) of sealing capacity, making them excellent for silt-tight and soil-tight applications.

Mandrels

The mandrels required for casting the Tylox® WT+, WT and ST connectors into concrete structures are available from Hamilton Kent. They are available in steel for smaller sizes and in fiberglass for larger sizes.

Manufactured to suit pipe sizes 15” (203 mm) to 72” (1830 mm), Tylox® WT+, WT & ST flexible cast-in connectors can accommodate many different varieties of connecting pipe materials and sizes for storm and sanitary systems, such as steel, ductile iron, PVC, clay and concrete.

For 4” (100 mm) to 15” (375 mm) OD pipe, we recommend using Tylox® XT Connectors, which are molded in sizes to accommodate PVC pipe from 4” (100 mm) to 18” (450mm).

Please consult your Hamilton Kent representative regarding your specific requirements.