Non-Locking Pipe Inlet Rings & Covers – Versatile, Durable Solutions
Bass & Hays provides non-locking pipe inlet rings and covers designed for use with concrete, metal, or plastic pipes. Crafted from durable cast gray and ductile iron, these versatile rings feature a reversible design, allowing them to serve as top or bottom flanged. Grates are also available to ensure a complete and reliable solution for your project needs. Stock items include standard plain (no lettering) options, while custom orders can accommodate special lettering, logos, or larger sizes ranging from 30″ to 48″. For traffic-rated applications, review individual items for load capacity and ASTM compliance to ensure they meet your specifications. Proudly American-made, Bass & Hays delivers exceptional quality, strength, and precision. Build with confidence by choosing Bass & Hays for non-locking pipe inlet rings and covers that excel in performance and craftsmanship.
CMP-12 12″ Reversible Pipe Ring and Cover or Monument Box
The CMP-12 12″ Cast Iron Reversible Pipe Ring and Cover, also known as a “Monument Box,” offers a versatile and durable solution for covering specific pipe sizes. Designed for flexibility, it can be used as a top or bottom flange. This stock item is available as a set or as individual rings and lids, with the standard design featuring a plain (no lettering) cover. Custom options, including special lettering, logos, or grates, may be available as stock items or through special orders. H-20 traffic-rated when the ring is properly installed in reinforced concrete and paired with a traffic-rated cover or grate, this product ensures reliable performance. For specific ASTM details, refer to individual items. Proudly made in the USA, it combines quality, functionality, and customization to meet your needs.
The CMP-12 12″ Cast Iron Drainage Grate provides efficient water flow for various drainage applications. This stock item is H-20 traffic rated when paired with an H-20 traffic-rated ring and properly installed in reinforced concrete, ensuring durability and performance under heavy traffic conditions. Solid covers are also available to meet your specific needs. Manufactured from uncoated cast ductile iron, it meets ASTM A536 (70-50-05) standards, delivering exceptional strength and reliability. Proudly made in the USA, this drainage grate combines quality, functionality, and compliance with industry standards.
NOTE: Grate slot total open area is 33 square inches (actual flow must be calculated by a qualified engineer)
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.
The CMP-12 12″ Cast Iron Reversible Pipe Ring is a versatile and durable solution for your drainage needs, designed to function as either a top or bottom flange to accommodate your specific pipe size. This stock item is H-20 traffic rated when installed correctly in reinforced concrete and paired with a traffic-rated solid cover or grate, ensuring reliable performance under heavy loads. Crafted from uncoated cast gray iron, it meets ASTM A48 CL35B or better and AASHTO M306-10 (M105) standards, guaranteeing exceptional quality. Proudly made in the USA, this product delivers long-lasting performance and compliance with industry specifications.
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.
CMP-15 15″ Reversible Pipe Ring and Cover or Monument Box
The CMP-15 15″ Cast Iron Reversible Pipe Ring and Cover, also known as a “Monument Box,” offers a versatile and durable solution for covering specific pipe sizes. Designed for flexibility, it can be used as a top or bottom flange. This stock item is available as a set or as individual rings and lids, with the standard design featuring a plain (no lettering) cover. Custom options, including special lettering, logos, or grates, may be available as stock items or through special orders. H-20 traffic-rated when the ring is properly installed in reinforced concrete and paired with a traffic-rated cover or grate, this product ensures reliable performance. For specific ASTM details, refer to individual items. Proudly made in the USA, it combines quality, functionality, and customization to meet your needs.
The CMP-15 15″ Cast Iron Drainage Grate ensures optimal water flow for a variety of drainage applications. This stock item is H-20 traffic rated when paired with an H-20 traffic-rated ring and properly installed in reinforced concrete, making it a reliable choice for heavy traffic conditions. Solid covers are also available to suit your specific requirements. Crafted from uncoated cast ductile iron, it meets ASTM A536 (70-50-05) standards, offering superior strength and durability. Proudly made in the USA, this drainage grate delivers exceptional quality, performance, and compliance with industry standards.
NOTE: Grate slot total open area is 54 square inches (actual flow must be calculated by a qualified engineer)
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.
The CMP-15 15″ Cast Iron Reversible Pipe Ring is a versatile and durable solution for your drainage needs, designed to function as either a top or bottom flange to accommodate your specific pipe size. This stock item is H-20 traffic rated when installed correctly in reinforced concrete and paired with a traffic-rated solid cover or grate, ensuring reliable performance under heavy loads. Crafted from uncoated cast gray iron, it meets ASTM A48 CL35B or better and AASHTO M306-10 (M105) standards, guaranteeing exceptional quality. Proudly made in the USA, this product delivers long-lasting performance and compliance with industry specifications.
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.
CMP-18 18″ Reversible Pipe Ring and Cover or Monument Box
The CMP-18 18″ Cast Iron Reversible Pipe Ring and Cover, also known as a “Monument Box,” offers a versatile and durable solution for covering specific pipe sizes. Designed for flexibility, it can be used as a top or bottom flange. This stock item is available as a set or as individual rings and lids, with the standard design featuring a plain (no lettering) cover. Custom options, including special lettering, logos, or grates, may be available as stock items or through special orders. H-20 traffic-rated when the ring is properly installed in reinforced concrete and paired with a traffic-rated cover or grate, this product ensures reliable performance. For specific ASTM details, refer to individual items. Proudly made in the USA, it combines quality, functionality, and customization to meet your needs.
The CMP-18 18″ Cast Iron Drainage Grate provides excellent water flow for demanding drainage applications. This stock item is H-20 traffic rated when paired with an H-20 traffic-rated ring and properly installed in reinforced concrete, ensuring reliable performance under heavy traffic conditions. Solid covers are also available to meet diverse project needs. Manufactured from uncoated cast ductile iron, it adheres to ASTM A536 (70-50-05) standards, delivering exceptional strength and durability. Proudly made in the USA, this drainage grate combines quality craftsmanship with industry compliance for long-lasting performance.
NOTE: Grate slot total open area is 73 square inches (actual flow must be calculated by a qualified engineer)
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.
The CMP-18 18″ Cast Iron Reversible Pipe Ring is a versatile and durable solution for your drainage needs, designed to function as either a top or bottom flange to accommodate your specific pipe size. This stock item is H-20 traffic rated when installed correctly in reinforced concrete and paired with a traffic-rated solid cover or grate, ensuring reliable performance under heavy loads. Crafted from uncoated cast gray iron, it meets ASTM A48 CL35B or better and AASHTO M306-10 (M105) standards, guaranteeing exceptional quality. Proudly made in the USA, this product delivers long-lasting performance and compliance with industry specifications.
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.
CMP-24 24″ Reversible Pipe Ring and Cover or Monument Box
The CMP-24 24″ Cast Iron Reversible Pipe Ring and Cover, also known as a “Monument Box,” offers a versatile and durable solution for covering specific pipe sizes. Designed for flexibility, it can be used as a top or bottom flange. This stock item is available as a set or as individual rings and lids, with the standard design featuring a plain (no lettering) cover. Custom options, including special lettering, logos, or grates, may be available as stock items or through special orders. H-20 traffic-rated when the ring is properly installed in reinforced concrete and paired with a traffic-rated cover or grate, this product ensures reliable performance. For specific ASTM details, refer to individual items. Proudly made in the USA, it combines quality, functionality, and customization to meet your needs.
The CMP-24 24″ Cast Iron Drainage Grate delivers superior water flow for large-scale drainage applications. This stock item is H-20 traffic rated when paired with an H-20 traffic-rated ring and properly installed in reinforced concrete, ensuring dependable performance under heavy traffic conditions. Solid covers are also available to accommodate various project requirements. Constructed from uncoated cast ductile iron, it meets ASTM A536 (70-50-05) standards, offering exceptional strength and durability. Proudly made in the USA, this drainage grate is a reliable, high-quality solution that meets industry standards.
NOTE: Grate slot total open area is 159 square inches (actual flow must be calculated by a qualified engineer)
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.
The CMP-24 24″ Cast Iron Reversible Pipe Ring is a versatile and durable solution for your drainage needs, designed to function as either a top or bottom flange to accommodate your specific pipe size. This stock item is H-20 traffic rated when installed correctly in reinforced concrete and paired with a traffic-rated solid cover or grate, ensuring reliable performance under heavy loads. Crafted from uncoated cast gray iron, it meets ASTM A48 CL35B or better and AASHTO M306-10 (M105) standards, guaranteeing exceptional quality. Proudly made in the USA, this product delivers long-lasting performance and compliance with industry specifications.
Contact Bass & Hays or call us at 1-800-258-2278 toll free or 972-263-1360 DFW Metro. Check stock, request technical data, drawings, submittals, BABA, AIS or LEED documentations and certifications, or to place orders.

