Danger Hot Tub Closed Sign (Strong Chemicals) - 18 x 12 Inches on Heavy-Duty Aluminum color_Marine Blue 049 inches and they are

049 inches and they are corrosion resistant

In addition to step-by-step audio prompts

this valve could save you hundreds of dollars per year when compared to a typical backwash valve

Battery is a common round watch battery and is included

This is a 30 Gallon Gray Chemical Tank System with 45MP3 Model Fixed Flow Pump

Danger Hot Tub Closed Sign (Strong Chemicals) - 18 x 12 Inches on Heavy-Duty Aluminum color_Marine Blue 049 inches and they areThis Danger Hot Tub Closed Strong Chemicals In Use aluminum sign measures 18 x 12 inches, is printed on heavy duty aluminum material, and is designed to inform patrons that the hot tub is closed when strong chemicals are in use in the pool. Our Danger signs indicate an imminently hazardous situation. This sign is lightweight, durable, and waterproof for indoor or outdoor use. This swimming pool and facility pool sign is designed for harsh swimming