{"product_id":"nds-1813-18x18-cast-iron-square-grate","title":"NDS 1813 - 18x18 Cast Iron Square Catch Basin Grate","description":"\u003cp\u003eDesigned for professional drainage installations, the NDS 1813 is an 18x18 cast iron square catch basin grate engineered for durability and high flow capacity. It fits standard 18 in. catch basins and provides reliable debris protection for lawns, driveways, patios, and landscaped areas.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial \u0026amp; finish:\u003c\/strong\u003e Heavy-duty cast iron, painted black for shipping; will form protective iron-oxide patina over time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions \u0026amp; weight:\u003c\/strong\u003e Actual size 16 7\/8\" x 16 7\/8\" x 1\"; weight 46 lb for solid, stable installation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlow \u0026amp; open area:\u003c\/strong\u003e 100.63 sq in open surface; up to 478.92 GPM at 1\" head (see tech spec for full flow table).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLoad rating:\u003c\/strong\u003e H-20 (Class C) load rated when properly installed in concrete; suitable for autos and light trucks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits NDS 18 in. catch basin series including models 1882, 1884, 1800, 1804, 1816, 1830, and 1840.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGrate opening:\u003c\/strong\u003e 1\" x 3\" slot pattern helps block debris while allowing rapid drainage.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eWith robust cast iron construction and an H-20 load rating, the 1813 grate balances strength and flow performance for residential and commercial surface drainage. Refer to the NDS spec sheet for installation details and load-rating guidance before use.\u003c\/p\u003e","brand":"NDS","offers":[{"title":"Default Title","offer_id":43671771145,"sku":"1813","price":405.17,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1987\/5531\/products\/1813-2_d917c68b-9d6c-48d1-955f-05781c3073c6.jpg?v=1503294844","url":"https:\/\/www.sprinklersupplystore.com\/products\/nds-1813-18x18-cast-iron-square-grate","provider":"Sprinkler Supply Store","version":"1.0","type":"link"}