The NDS 3" & 4" Pop-up Drainage Emitters provide an efficient solution for releasing excess water from drainage systems. Designed to 'pop up' as water pressure builds, these emitters allow water to discharge at ground level, preventing pooling and erosion in landscaped areas. Constructed from durable, weather-resistant materials, they fit standard 3" and 4" pipes, making them compatible with most drainage setups. When not in use, the emitters sit flush with the ground, creating a seamless, low-profile appearance. Ideal for residential and commercial applications, pop-up emitters are a practical choice for efficient water management.