Which one is better for connecting a downspout to a buried drain pipe?

The Normandy C1705 is the direct fit for a standard 3 x 4-1/4 downspout feeding 4-inch tubing, and its offset keeps the pipe near the wall. Use the Amerimax if the buried line is corrugated and you need to step down or bend.

Both are simple plastic fittings with no moving parts, so life comes down to sun exposure and soil contact. The Amerimax publishes a temperature range and pressure rating, which makes its limits clearer; the Normandy gives no such figures.

Can the Amerimax replace the Normandy?

Only if your downspout outlet matches 3-inch or 4-inch corrugated pipe. The Amerimax has no offset, so the run will not sit as close to the wall.

Is the Normandy worth stepping up to?

There is no real step up in grade; it is a different shape. Pick it when wall clearance and a rigid joint matter more than flexibility.

Will either fit a 3-inch downspout?

The Amerimax accepts 3-inch corrugated pipe. The Normandy is sized for 3 x 4-1/4 standard downspout, not round 3-inch pipe.

Do I need to seal the joints?

Both rely on a friction fit, so tape or sealant at the connection helps. Normandy's own guidance suggests pipe wrap tape to hold fittings and keep roots out.

Amerimax ADP53102 Downspout Adapter vs Normandy C1705 Downspout Adapter

Both are cheap 4-inch downspout adapters, but they solve different problems. The Amerimax ADP53102 is a flexible polypropylene coupling that joins 3-inch or 4-inch corrugated pipe to 4-inch PVC, so it bends around awkward angles and handles DWV pressure and temperature swings. The Normandy C1705 is a rigid offset adapter that slips over a standard 3 x 4-1/4 downspout and into 4-inch tubing, holding the run tight to the wall. Buy the Amerimax for repairs and transitions; buy the Normandy for a clean, straight run against siding.

Choose the Amerimax ADP53102 if you need to join corrugated pipe to PVC or work around a bend, and want a flexible fitting rated for DWV use.
Choose the Normandy C1705 if you are connecting a standard 3 x 4-1/4 downspout to 4-inch tubing and want the run to hug the wall.

Prices

Amerimax ADP53102 Downspout Adapter: $4.79 at Menards (last seen Nov 12)
Normandy C1705 Downspout Adapter: $7.30 at Master Landscape Supply (last seen Nov 12)
Difference: the Amerimax ADP53102 Downspout Adapter is $2.51 cheaper than the Normandy C1705 Downspout Adapter at the latest prices (Nov 12)

	Amerimax ADP53102 Downspout Adapter	Normandy C1705 Downspout Adapter
Flexibility	Flexible body bends to fit most angles	Rigid molded offset
What it connects	3 in or 4 in corrugated pipe to 4 in PVC	3 x 4-1/4 downspout to 4 in tubing
Wall clearance	No offset; sits where the pipe lands	Offset design keeps the run close to the wall
Pressure and temperature rating	70 psi working pressure, -50 to 150 deg F	Not rated for pressure or temperature
Material	Polypropylene	Not stated; rigid plastic
DWV use	Rated for DWV applications	Drainage only, no DWV rating
Fit style	Slips over or into pipe ends	Fits over the downspout and inside tubing

Spec	Amerimax ADP53102 Downspout Adapter	Normandy C1705 Downspout Adapter
Connection Size	4 in	—
Dimensions	3 x 4 x 4 in	—
Gutter Size	3, 4 in	—
Material	PVC	—
Color	Black	—
Type	Flexible	—
Pressure Rating	70 psi	—
Temperature Rating	-50 to 150 deg F	—
Height	10.2 cm	—
Length	20.3 cm	—
Width	10.2 cm	—
Weight	0.02 kg	—

Amerimax ADP53102 Downspout Adapter vs Normandy C1705 Downspout Adapter

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Amerimax ADP53102 Downspout Adapter vs Normandy C1705 Downspout Adapter

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Amerimax ADP53102 Downspout Adapter

Normandy C1705 Downspout Adapter

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Amerimax ADP53102 Downspout Adapter

Normandy C1705 Downspout Adapter

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