Inside Top Bell Dimension refers to the top end of the downspout boot in
which the rain leader is inserted. This dimension is determined by the depth
(dimension D) and width (dimension W) of the rain leader coming into the
The Top Bell Inlet will be on average 1/4" larger on both depth and width to
easily accommodate the incoming rain leader.
"Length" refers to the total overall length of the downspout boot (Dimension L).
Outlet OD Dimension refers to the outside diameter at the bottom of the
downspout boot (dimension B) which connects to the drainage pipe.
This connection may be made by using a flexible connector or hard plumbed
directly to the drain pipe.
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