The Truflo #TF500 Blow-Off is designed and engineered with a slim profile that fits into a standard 5¼” adjustable valve box. The #TF500 provides an alternative to a gate valve, 2” blow-off assembly with two valve boxes and is built for frequent exercising and longevity with minimal maintenance. The #TF500 is cast iron, steel, and brass construction with all brass principle working parts. An all brass option (see photo) is also available. The Truflo #TF500 comes standard with a 2” FIP vertical inlet, and a 2” MIP outlet. The Truflo #TF500 is fully serviceable from above ground. Certified to NSF/ANSI 372.