FDM’s all in one kit for Buried Downspouts

How to Select Downspout Adapter

Standard Riser with 90 (not pictured):

Easiest installation for the DIYer.  Adapter can be cut with a razor blade knife to your existing downspout as is with no modification.

Upgrade to Vented Wye for additional $10 (pictured in photo):

You may have to remove your gutter strap and trim the downspout to make the wye fit. This may require more effort during installation.