HomeAll ProductsInlet BoxesInlet BoxesOur inlet boxes are poured at either 3,500 or 5,000 psi and reinforced with wire and/or rebar for maximum strength. Available in 3 different sizes that can be made to any desired height.Inlet Box Info26 in x 26 inmade to desired heightknockout inlet boxConcrete frame casted into it for grateWeighs ~400 lbs3 ft x 3 ftmade to desired height can put any size hole at any desired elevation Weighs ~1,400 lbs4 ft x 4 ft desired heightcan put any size hole at any desired elevation Weighs ~3,200 lbs