Strong Acrylic construction for ease of use in multiple installation types. Perfect for wet walls, formal falls, privacy walls, patio fountains, and indoor waterfall applications Upgrade to color-changing lighted version and be able to power lights on and off, control brightness, color selection and color changing speed. Water inlet is 1.5" Female Thread Located In Center on spillway box bottom. We recommend 1000 GPH per foot of spillway length for proper flow Backed by a 1-Year Manufacturer's Warranty! Sheer Elegance spillways produce a shimmering clear arc of water during the day and create a captivating addition to a Koi pond, water garden, pool or spa, Sheer Elegance lighted spillways are available in 12", 24", 36", 48" and 60" widths. -Add a light bar to enhance your feature with a dramatic lighted cascade of water that you can enjoy at night. The spillway is constructed from 2 sheets of clear acrylic spaced approximately 3/16" apart. This tight outlet produces a beautiful sheer water effect. Special note: Sheer Elegance Lighted Spillways are typically used in wet walls and formal falls applications where debris is at a minimum. They are generally not used in fish ponds where water-borne debris such as fish waste and algae may clog the spillway. Additional filtration will be required when Sheer Elegance lighted spillways are used in Koi ponds, water gardens or pondless waterfalls. The additional required filtration can be easily achieved by using a pre-filter such as an external pressure filter. Please feel free to call or email us with questions regarding your application; we're happy to help!