1-Inch PVC to Downspout Adapter

This 1-inch male-threaded adapter connects standard 1" PVC fittings directly to a rectangular downspout. I designed it as part of my rainwater collection overflow system to route excess water into the gutter cleanly and securely.

It prints without supports, mounts flush to the downspout, and is optimized for outdoor use with PETG. The threading fits snugly into common PVC elbows or tees.

🛠️ A 1-inch hole must be drilled into the downspout for proper installation.

Features:

• ✅ 1" male thread – fits standard PVC fittings
• ✅ Flat flange for downspout mounting
• ✅ Support-free design for clean prints
• ✅ PETG for outdoor durability
• ✅ Ideal for overflow drainage, rainwater systems, A/C or pool discharge
• ✅ Requires a 1" hole in the downspout for proper fit

Use Case:
Built for my rainwater system’s overflow discharge. Works equally well for redirecting other drainage sources into your gutter system.