InvisaFlow StealthFlow Low Profile Downspout Extension-4600 - The Home Depot
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Model # 4600

Internet # 202532737

Store SKU # 601796

StealthFlow Low Profile Downspout Extension

InvisaFlow StealthFlow Low Profile Downspout Extension

This item has been discontinued.
The Home Depot no longer carries this specific product.

$9.96 / each


Model # 4600

Internet # 202532737

Store SKU # 601796

The StealthFlow Downspout Extension is a handy accessory that helps your downspout and gutters empty water away from your home and your foundation. This extension features a flexible downspout connector for easy attachment and helps you prevent soil erosion near your home. The downspout is designed for an unobtrusive look and can be covered with mulch, straw or stones for a subtle appearance.

  • Helps prevent erosion near your foundation by diverting water flow
  • Made from black plastic for lasting durability
  • Low-profile design can be hidden by landscaping
  • Compatible with all standard downspouts
  • Flexible connector allows for easy installation

Info & Guides

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Downspout Size (In.) 
2 X 3, 3 X 4 
Maximum Extendable Length (ft.) 
Maximum Length (In.) 
52 in 
Minimum Length (In.) 
48 in 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Color Family 
Product Weight (lb.) 
1.55 lb 
Downspout Extension 
Warranty / Certifications
Manufacturer Warranty 
For warranty information on this product, please call our Internet Customer Service Center at 1-800-435-4654 


Rated 4.4 out of 5 by 61 reviewers.
Rated 5.0 out of 5.0 by Works great Works great and looks nice. Fit my 2x3 spouts with the included adapter (remove adapter for 3x4), just needed 2 smalls screws i had laying around to secure. Probably didn't need to screw them in, but I wanted to. Rain from each side of my roof end up at 2 downspouts so when it rains hard, there is a ton of water that was coming out of the normal 90 degree elbow & spout splash...some going back toward the house. Bought these and extensions and also dug down a foot or so and filled with stone so the water can drain properly. The product is high quality, but very light, so you need to cover with stone or mulch..or just have larger stones on either side like I have on one of mine temporarily. Check the pics. June 12, 2013
Rated 2.0 out of 5.0 by Mediocore - Requires constant maintenance Have had this product for a couple of years, to divert water from the downspout away from the house. It does this to some extent, but the sections are so loosely connected that it leaks at every joint. Adding to this is the 'collection' of leaves and debris within the extensions, compounded by the corrugated sections, which retain leaves, debris and slows the runoff of water. It must be dis-assembled on a regular basis to remove the leaves, etc., otherwise it is ineffective. There has to be a better product out there, somewhere... March 8, 2015
Rated 5.0 out of 5.0 by Downspout Extension These were the perfect product at a great price. A very simple way to get the water flow away from our foundation. Super-fast shipping too, HD ROCKS!!! December 17, 2014
Rated 4.0 out of 5.0 by Works as described Works as described but because the components snap together and are not water-tight the drain must flow "down-hill". I purchased this extension and an additional attachment to move the downspout water about 6 feet away from my house. I used it in an area of my yard that is almost flat and the water leaked from the connector joints. I took the components apart and sealed the joints with silicone sealant. That significantly improved the leaking issue. April 23, 2015
Rated 3.0 out of 5.0 by OK, but not great - I'd recommend this product, but only because it's a bit more convenient to install than its aluminum counterpart. I do like the low profile it offers, plus, the price at HD is better than many other sources. However, the item itself is a bit hyped. For example, I stepped on a single section one day and my whopping 165 lbs actually bent the poly. Granted, that's better what would happen when stepping on an aluminum downspout, but still, hardly SUV weight-bearing material as InvisaFlow's sales vid would have you believe. Finally, the system invariably has small leaks at virtually every seam - unless you have all the sections Perfectly sloped - which tends to be Very tricky. August 19, 2014
Rated 3.0 out of 5.0 by Ok I suppose this is OK, but it's too large to fit straight down from a 2"x3" gutter pipe. To fit properly, the gutter would need to be about an inch away from the house or unattached from it's mounting bracket. That didn't seem like a good idea. I finally just positioned it under the pipe which is not good either. It fit fine on an arched gutter extension but then I couldn't place it where it needed to be. Quality seemed to be fine. It is very wide so if a flower bed is full, you'll have to move some things. Also, if you doing exactly what's shown in the video, have plenty of clearance under your gutter pipe and the ground slopes downward, you're set. If your ground is level and the pipe doesn't sit a foot from the ground, the size of the flex hose is such that I had to dig out ground to get the rigid pipe to lay flat. All this being said, there should be two of these on the market, a smaller one for 2x3 pipe and this one for 3x4 pipe. It's just big. Then again, maybe I'm the only one in this situation too. April 14, 2015
Rated 4.0 out of 5.0 by The Stealthy Stealthflow The low profile of the product makes it perfect for applications where there is foot traffic. I found it accidentally and wondered why it is only available online. It is the kind of thing that may well draw positive attention on the store shelf. July 22, 2014
Rated 5.0 out of 5.0 by Exactly what I was looking for. I have two downspouts in the rear of my home. When it rains, the water draining pools up on our clayish soil. As a result, these areas remain wet or damp for an extended period of time. We were getting ready to do some planting alongside this area and I wanted a way to both extend, and disperse the water throughout this area. I really didn't want it just gushing out of the downspouts as it now does. What I didn't want was an actual length of downspout acting as an extension, or those plastic auto-roll things which don't work. I was fortunate to find this product and ordered two. The item is two pieces which clip inside each other. Once once side is within the detentes, it's a little tricky locking in the other side. I found by lifting up the side to be inserted by the edge, I was able to get both sides clipped in much easier than brute force, because that wasn't working. On the actual flat extension part, there is clearly a top and bottom. The bottom has perhaps 12 holes running alongside it's length to disperse water. These were really small, so I just enlarged them with my drill. I'm rather disappointed in the fact that on the picture, there appears to be holes alongside the top as well...Well, there are no holes on top, their just dimples. Again with the drill, I just drilled about 5 holes on each side. This way I'll have drainage hole alongside both the top and bottom to lessen the flow out the end. I really like this product. It's thick PVC, easy to work with, and hides well when covered over with mulch. The only thing you really notice is the round extension coming out of the downspout into the ground. I think the other reviews mentioning this thing leaking all over the place and not really extending their drainage perhaps didn't fully "lock" the two mating pieces. What I do know is this: I spent a lot of time looking for something like this for solving my rain pooling and disbursement issues. This product works exactly as I hoped it did. The construction is such that this thing won't break apart on me. The price is great. After two big rain storms, I had no leaks like others mentioned, no pooling like before, and the rain dispersed as I hoped it would. I am very happy with this product, very happy. May 10, 2013
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