--- product_id: 13218514 title: "Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green" brand: "thermwell" price: "€ 24.67" currency: EUR in_stock: true reviews_count: 8 category: "Thermwell" url: https://www.desertcart.hr/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends store_origin: HR region: Croatia --- # Custom trim to fit Auto-unrolls when wet Tool-free install Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green **Brand:** thermwell **Price:** € 24.67 **Availability:** βœ… In Stock ## Summary > 🌿 Keep your foundation dry and your curb appeal high with effortless style! ## Quick Answers - **What is this?** Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green by thermwell - **How much does it cost?** € 24.67 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hr](https://www.desertcart.hr/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends) ## Best For - thermwell enthusiasts ## Why This Product - Trusted thermwell brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Customizable Length:** Trim to any length with scissors for a perfect fit tailored to your home. - β€’ **Durable Matte Finish:** Sleek green plastic with a modern matte finish blends seamlessly with your exterior. - β€’ **Compact & Lightweight:** At just 0.48 ounces and 12 feet long, it’s easy to handle and store when not in use. - β€’ **Rain-Responsive Design:** Automatically extends when it rains to protect your foundation from water damage. - β€’ **Effortless Installation:** No tools requiredβ€”get it set up in minutes and enjoy hassle-free maintenance. ## Overview The Frost King DE300 is a 12-foot green plastic downspout extender that automatically unrolls during rain to divert water away from your foundation. It installs easily without tools, trims to any length, and features a durable matte finish for a modern look. Lightweight and removable, it’s designed for efficient water management and easy seasonal storage. ## Description Product Description Extender fits all standard downspouts. Takes water away from foundation. Installs easily, without the use of any tools. Unrolls automatically when it rains, and roll back up manually when it's dry. Trim to any length with scissors. Measurements are 12' x 7". From the Manufacturer Extender fits all standard downspouts. Takes water away from foundation. Installs easily, without the use of any tools. Unrolls automatically when it rains, and roll back up manually when it's dry. Trim to any length with scissors. Measurements are 12' x 7". P.when('A').execute(function(A) { A.on('a:expander:toggle_description:toggle:collapse', function(data) { window.scroll(0, data.expander.$expander[0].offsetTop-100); }); }); Manufacturer Contact Information 1-800-526-5265 See more Review: free delivery - Great product as described, good price, fast delivery. Review: It is cheapo plastic and will never work as advertized - OK. First, it looks NOTHING like the picture. In the picture, it has an end cap that seals. In the picture, it does not have holes all the way down the plastic. In the picture, it looks like flexible, yet sturdy plastic. What I got was cheap plastic not much thicker than a gallon Ziploc bag. It will last about a week in the sun and weather. Because it had not anchor at the end, it would also just blow around and be worthless. There is no simple way to roll this up. It will just unroll itself. Do not recommend & I returned. Cheap, and badly designed. I would have paid $15 dollars for something I could have used. ## Features - Unrolls automatically when it rains, and roll back up manually when it's dry - Takes Water Away From Foundation - Installs Easily, Without The Use Of Any Tools - Measurements Are 12' X 7" ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003K1GKCS | | Additional Features | Removable | | Best Sellers Rank | #16,706 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #16 in Gutter Downspouts | | Brand Name | Thermwell | | Color | Green | | Customer Reviews | 3.5 3.5 out of 5 stars (2,077) | | Finish Types | Matte | | Fits Hole Size | 3 Inches | | Global Trade Identification Number | 00077578057576 | | Included Components | Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green | | Item Depth | 7 inches | | Item Type Name | Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green | | Item Weight | 0.03 Pounds | | Manufacturer | THERMWELL PRODUCTS | | Manufacturer Contact Information | 1-800-526-5265 | | Manufacturer Part Number | DE300 | | Manufacturer Warranty Description | Warranty. | | Material Type | Plastic | | Model Number | DE300 | | Number of Items | 1 | | Product Style | Modern | | UPC | 077578057576 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Thermwell - **Color:** Green - **Finish Type:** Matte - **Material:** Plastic - **Special Feature:** Removable ## Images ![Frost King DE300 Standard Plastic Drain Away Downspout Extender, Extends 12-Feet, Green - Image 1](https://m.media-amazon.com/images/I/71KS7X5-oHL.jpg) ## Available Options This product comes in different **Size** options. ## Questions & Answers **Q: Can I get this in white** A: I would have liked white too but didn't see any available. **Q: Will this work at the end of a drain pipe past the btm of a downspout?** A: Yes yet it doesn't retract , it just lays there. If its windy it will fly around so i zip tie mine to the downspout. **Q: Can you cut it?** A: Yes. It is just thick plastic material. **Q: Can you place to go around corners if you unroll yourself?** A: Probably, if it is not a tight corner. I think a sharp bend would make the water back-up. It is just a thin plastic tube. ## Customer Reviews ### ⭐⭐⭐⭐⭐ free delivery *by G***I on March 23, 2026* Great product as described, good price, fast delivery. ### ⭐ It is cheapo plastic and will never work as advertized *by N***X on August 20, 2025* OK. First, it looks NOTHING like the picture. In the picture, it has an end cap that seals. In the picture, it does not have holes all the way down the plastic. In the picture, it looks like flexible, yet sturdy plastic. What I got was cheap plastic not much thicker than a gallon Ziploc bag. It will last about a week in the sun and weather. Because it had not anchor at the end, it would also just blow around and be worthless. There is no simple way to roll this up. It will just unroll itself. Do not recommend & I returned. Cheap, and badly designed. I would have paid $15 dollars for something I could have used. ### ⭐⭐⭐⭐ Happy with the product, but lengths are misleading *by T***Y on February 13, 2012* The product works well and performs as advertised. We needed a way to get the water from the downspout beyond our flower garden area (which was at the base of the downspout). To do this, we needed at least a 6' extension to the bottom of the downspout. The normal heavy plastic extenders (like a bendy straw) that can be found at every hardware store are not long enough. A simple 6'-7' piece of downspout doesn't work in our situation because the elevation needed causes the water to not run out at the end. This is the perfect solution, except that the small holes are punched into the last 2' cause the effective length to be much less than listed. If you look closely a the illustration on the packaging (product image), you can see what I'm talking about. Because of this, we left our too-short bendy-straw extender in place, then added this product to the end of that. That got us the distance away from the flower garden that we needed. Keep in mind that you will consume 6" to 12" when installed on the downspout side, then 2' of the other end will have the little holes punched into it. The effective length of a 8' extender will only be around 5'. Had I known this, I would have purchased the 12' version. Other than that, it has been working great so far. The material is like a super-thick trash bag...or similar to a very high quality Ziploc freezer bag. It doesn't seem like something that will last for 10-15 years, but it should do the job for quite a while. I'm happy with the purchase. --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hr/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends](https://www.desertcart.hr/products/13218514-frost-king-de300-standard-plastic-drain-away-downspout-extender-extends) --- *Product available on Desertcart Croatia* *Store origin: HR* *Last updated: 2026-05-17*