At Cemcast Pipe and Precast, we take great care to manufacture premium quality round pipe, arch pipe, and manholes to exacting standards. But, like any good construction material, it needs to be handled and installed correctly to take full advantage of the quality that’s crafted into every product.
We’re committed to ensuring contractors have the best instructions for installing our products. Following these basic steps can ensure a relatively easy, trouble-free installation.
All Cemcast Pipe and Precast round pipe, arch pipe, and manholes are produced with a single-offset gasket joint. These gaskets ensure watertight connections to 13 psi when properly installed. A rating of 13 psi has the equivalent pressure of a column of water 30’ deep. To achieve such a high psi rating, we produce pieces that have a single-offset joint with minimal annular space for the gasket. This enables a watertight seal, but requires the contractor to follow some specific steps during installation:
First, check to ensure the joint is free of dirt and other foreign debris.
Next, place the gasket on the spigot in the proper direction. The gasket must be seated against the offset all the way around the spigot.
After properly seating the gasket, square up the pipe or riser that is going to be joined. This is an important step. Joining the pieces at an angle could damage the bell
When the pieces are properly aligned and then mated, push them all the way home. A properly homed joint will not have a gap, ensuring the gasket seals properly.
The most important aspect of proper joining of pipe and manhole pieces is to ensure the gasket is evenly installed all the way around the offset before homing the joint. An improper method would be to fully set one side of the product and then try to force the opposite side into place. This technique could break the bell. The joint gap (or annular space) is as small as 1/8” per side, so it is not possible to mate the pieces at an angle in this manner.
Finally, it’s also important to note that the Hamilton Kent Tylox SuperSeal gasket we supply is self-lubricating and does not require lube or equalization. We do recommend, however, equalizing the gasket when installing Cemcast gasketed arch pipe. Follow the steps above, matching a quality installation with quality Cemcast products, and the resulting system will be watertight and trouble-free for decades to come.