These durable, high quality machined aluminum drain boss assemblies eliminate the need for polydomes, captive nut assemblies and suction cup assemblies. They are highly recommended for use with modular vanities and floating bowls - especially when using Extrudable Tooling Wax such as GruberCare Ex-Wax Extrudable Tooling Wax.
Two drain boss assembly options are available below:
Gruber Standard Drain Boss Assembly
Note: Another drain boss alternative is also available that some cultured marble manufacturers prefer. See item R-01132 below for details.
Order PN #191045
Hollow Core Drain Boss Assembly
This drain boss is an alternative to the standard Gruber Drain Boss shown above. This product utilizes the same 1-9/16" diameter drain boss, but with a larger 1/2" center drilled hole. This product also includes a slightly larger bolt with a drilled center "hollow core" that some cultured marble manufacturers prefer. This bolt is drilled all the way through the bolt, which serves two functions - it allows pressure to be equalized from the mold surface to the backside of the mold and allows the operator to blow air down into the mold cavity during demolding to assist in mold release.
Order PN #R-01132