Concrete rings with a 24 inch inside diameter can be manufactured in various thickness’.  They are used to adjust the final elevation of manhole castings. Standard sizes are 2", 4" & 6".

RAM-NEK flexible plastic gaskets are available in several sizes with 1 ½" X 3'-6" strips being the most popular. 20 pieces per box.

Press-Seal Corporation has a variety of joint sealants. We stock the Pro-Stik Butyl in various sizes.

Flexible connectors are designed to provide watertight connections for pipes entering precast manholes and other concrete structures.

CP6 Flexible Manhole Sleeves are rubber sleeves with a flanged waterstop that is cast into the wall of a concrete manhole. The pipe is secured to the sleeve with a stainless steel clamp. It is available for 8” pipe. (SDR 35, C900 or DIP.)

Press-Seal is a flexible rubber connector that is installed into a hole that has been cored in a concrete manhole.  The rubber sleeve is secured in place by a stainless steel band wedged in  place. The sleeve is clamped to the pipe with a stainless steel clamp. It is available for pipe with outside diameters from 1.70 to 44 inches.

A-Lok Products Z-Lok Connector is cast into the concrete manhole wall during manufacturing. It is available for pipe with outside diameters from 1.75 to 21.25 inch.

U. S. Concrete Products can provide various steel adjusting rings to raise manhole rings when repaving or rim adjustments are required.

Baffles are available in fiberglass or corrugated aluminum.  They are used in drainage structures to prevent floatable solids from exiting the structure through the effluent line.

U. S. Concrete can provide all types of castings such as manhole frames and covers, as specified for any project.
http://www.usfoundry.com/usfoundry/

U. S. Concrete Products can supply cast iron or steel gratings.  Grates can be round, rectangular or square.  The style may vary depending on the application.  Cast Iron gratings are available in  heavy duty for traffic loads, medium duty for  driveways and parking lots, and light duty for non-vehicular traffic.

Steel gratings are manufactured of A-36 steel and conform to ASTM  A569 specifications. They are available in H-25, H-20, H-15 and non-traffic loadings.  Gratings can be galvanized or painted to customer specifications.
http://www.usffab.com/usffab-products/catalog/details/9

U. S. Concrete Products can provide square and rectangular access  doors and hatches cast into flat slabs for various uses. Floor doors come in various sizes and configurations. They can be cast iron, steel or aluminum.

Aluminum doors are available for 150 p.s.f. and 300 p.s.f. live loading.
 
Steel doors are available for 300 p.s.f. live load and for off street locations with occasional H-20 loading.

Cast Iron doors are available in heavy duty for traffic loads, medium duty for driveways and parking lots, and light duty for non-vehicular traffic.

U. S. Concrete Products can provide opening covers made of diamond plate cut to almost any configuration. They may be used in non-traffic conditions and must be designed by the customer. They can be plain,  painted or galvanized.

U.S. Concrete Products Corporation may provide Eye-bolts and chains in storm drainage inlets to help prevent the grates from falling down in the structures during cleaning and/or theft.