12"x12" Square Distribution Box

The 12" Polylok Square Distribution Box comes factory precut with one inlet and three outlets. Four seal assemblies are provided with each unit and will accept 2”, 3”, and 4” pipe. Optional 6” seals are also available for applications demanding 6” pipe. Polylok’s 12” Square Distribution Box has a 5 gallon capacity and is designed to withstand normal abuse in landscaping applications.


  • 5 gallon capacity
  • Supplied with four seal assemblies
  • Seals accept 2”, 3”, and 4” pipe
  • Optional 6” seals available
  • Precut box with one inlet and three outlets
  • Box accepts 6” pipe by cutting on 6” guides
  • 5 gallon capacity
  • Solid cover supplied (optional grates available)
  • 4 stainless steel screws supplied

Part Number

  • 3016-DB12

Similar Products

12" Distribution Boxes

The Polylok Distribution Box is the most versatile box on the market today. You can choose what height of distribution boxes you want your inlets and outlet slotted filters to be. It also comes compete with the only seal on the market of distribution boxes that accepts 2”, 3”, 4” and corrugated pipe. No more different fittings in distribution boxes to inventory! It also comes with stabilizing feet to anchor the box.

20" Distribution and Valve Box (8 Hole,7 Hole, 6 Hole)

We have the solution to all of your onsite needs with our 20” Distribution Box! This box is great for large or small applications. No other box allows you to choose where to set your inlets or outlets. There’s no need to worry about different colored fittings or plugs to inventory because as well as accepting 2”, 3” & 4” pipe, our equal flow distribution boxes can also accept 6” pipe. Our 20” Distribution Box will also accept our 20” Risers so you can easily bring the box to grade. It is the most versatile Distribution Box available on the market today!

Square Catch Basins

Offered in two sizes, Polylok manufactures the most versatile Catch Basin on the market. The basin comes complete with either a black or green grate, and two seals that accept 2", 3", 4", and corrugated pipe. You can choose your inlet and outlet heights, and it can accept one inlet and up to three outlets.

Goes Well With

Seals for 12" & 20" D-Boxes

Our D-Box seals are the only true watertight seals on the market today. Our 4'' seal fits in both our 12'' and 20'' plastic D-Box. It accepts 2'', 3'', 4'' and corrugated pipe. Our 6'' seal works in our 20'' plastic D-Box. No other seals can do so much!