--- product_id: 89258804 title: "Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12)" brand: "air gap international" price: "Β£31.16" currency: GBP in_stock: true reviews_count: 8 category: "Air Gap International" url: https://www.desertcart.co.uk/products/89258804-drain-line-adapter-dla-with-1-4-inch-quick-connect store_origin: GB region: United Kingdom --- # silent, gurgle-free operation 1/4-inch quick connect fitting easy, no-drill installation Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) **Brand:** air gap international **Price:** Β£31.16 **Availability:** βœ… In Stock ## Summary > 🚰 Upgrade your RO system with silent, seamless drain connection! ## Quick Answers - **What is this?** Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) by air gap international - **How much does it cost?** Β£31.16 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/89258804-drain-line-adapter-dla-with-1-4-inch-quick-connect) ## Best For - air gap international enthusiasts ## Why This Product - Trusted air gap international brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Locking Clip Security:** Prevents leaks and accidental disconnections with a reliable locking mechanism. - β€’ **No-Drill Installation:** Connects directly to sink drainpipeβ€”no pipe modifications needed. - β€’ **Certified & Code-Ready:** UPC, IPC, and ASTM F 409 compliant for guaranteed safety and legality nationwide. - β€’ **Whisper-Quiet Drain Line:** Eliminates annoying gurgling sounds for a peaceful kitchen environment. - β€’ **Effortless 1/4-inch Quick Connect:** Push-in fitting ensures a secure, leak-proof connection without hassle. ## Overview The ET112-001 Drain Line Adapter by AIR GAP INTERNATIONAL is a 1/4-inch quick connect fitting designed for reverse osmosis systems. It offers easy, no-drill installation directly to sink drainpipes, eliminates gurgling noise, and features a locking clip to prevent leaks. Certified to meet UPC, IPC, and ASTM standards, it ensures safe, code-compliant use in both residential and commercial settings. ## Description The ET112-001 is a reverse osmosis water filter drain line adapter. It is designed to connect discharge 1/4-inch tubing from a RO filter to the drain. The ET112-001 is connected to the sink drainpipe to receive the reject water from an under-counter reverse osmosis appliance or a distillation system. The installation provides a reliable and trouble-free connection of the 1/4-inch discharge water tubing to the drain line. The ET112-001 is designed for residential and commercial use. The ET112-001 is the preferred way to connect RO system to the drain line. The ET112-001 eliminates gurgling sound and provides a safe and effective way to comply with all local plumbing codes. The ET112-001 drain adapter is UPC and IPC listed. Review: Great solution for RO waste water - Easy to install, leak free. I’m using it horizontally on the non garbage disposal side of double basin sink. Review: Great product - Awesome design, Much more secure than the sale style. really liked how easy it was to install. In my situation I was literally able to just cut across where I drilled the hole for the saddle style to install and put one piece on either side and that was pretty much it. But that's been my case in another situation it may no work. Verify if it'll work for you. Price in my opinion is a bit steep but it worked so can't complain about that. It fit my application at 1-1/2" pipe just right. Too maybe 5 minutes to install. The was used on my aqua true system. ## Features - ❀ SIMPLE INSTALLATION: The ET112-001 is designed for connecting discharge 1/4-inch tubing from a reverse osmosis (RO) filter to the drain. Its 3-way repair tee directly connects to the sink drainpipe. Its drain line adapter with a 1/4-inch push-in connector accommodates a 1/4-inch OD RO poly tubing. The ET112-001 resists clogging for lifelong operation. The recommended installation of the ET112-001 is vertical. - ❀ DRAIN LINE CONNECTION: The ET112-001 enables the connection of the RO water filter to the drain. Installing the ET112-001 is simple as does not require drilling into wet pipes. It also comes with all the fittings and instructions needed for installation. - ❀ QUIET OPERATION: The ET112-001 eliminates gurgling noise from RO system. - ❀ DRY OPERATION: The ET112-001 has a locking clip for 1/4-inch quick connect to prevent leaks and accidental disconnection of the tube. The locking clip is fitted around the 1/4-inch quick connect push-in connector. - ❀ CERTIFICATION: The ET112-001 is legal to install in any state. It is UPC (Uniform Plumbing Code) and IPC (International Plumbing Code) listed, and ASTM F 409 compliant. These certifications assure that ET112-001 is safe to use. The testing is conducted for every manufactured lot to ensure consistent performance. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07B43RD9L | | Best Sellers Rank | #78,110 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #2,595 in Pipe Fittings | | Brand | AIR GAP INTERNATIONAL | | Brand Name | AIR GAP INTERNATIONAL | | Color | White | | Connector Type | Tee | | Customer Reviews | 4.6 out of 5 stars 76 Reviews | | Exterior Finish | Brass | | Item Dimensions | 2 x 1.5 x 4 inches | | Item dimensions L x W x H | 2 x 1.5 x 4 inches | | Manufacturer | AIR GAP INTERNATIONAL | | Manufacturer Part Number | ET112-001 | | Material | Plastic | | Material Type | Plastic | | Model Number | ET112-001 | | Number of Pieces | 1 | | Size | 1/4 inch | | Thread Type | NPT | | UPC | 854628005646 | | Unit Count | 1.0 Count | ## Product Details - **Size:** 1/4 inch - **Material:** Plastic - **Brand:** AIR GAP INTERNATIONAL - **Color:** White - **Item dimensions L x W x H:** 2 x 1.5 x 4 inches - **Connector Type:** Tee - **Exterior Finish:** Brass - **Thread Type:** NPT - **Number of Pieces:** 1 - **Manufacturer:** AIR GAP INTERNATIONAL ## Images ![Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) - Image 1](https://m.media-amazon.com/images/I/618wlfPaJDL.jpg) ![Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) - Image 2](https://m.media-amazon.com/images/I/613wyuVQDlL.jpg) ![Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) - Image 3](https://m.media-amazon.com/images/I/71agiZAiijL.jpg) ![Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) - Image 4](https://m.media-amazon.com/images/I/71gr3AxIMgL.jpg) ![Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) - Image 5](https://m.media-amazon.com/images/I/71sOexbhyML.jpg) ## Questions & Answers **Q: Can this adapter be installed horizontally near the outlet of the garbage disposal?** A: No, It probably should not be installed this way. Installing vertically above the p-trap is the best option. **Q: Does this item hook up to 1 1/2” pipe?** A: it does not fit a PVC or ABS 1 1/2" pipe you will need to get the 1 1/2" sink kit cut those and modify it that way. **Q: Does this item have a check valve to prevent backflow?** A: no. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great solution for RO waste water *by R***B on February 9, 2026* Easy to install, leak free. I’m using it horizontally on the non garbage disposal side of double basin sink. ### ⭐⭐⭐⭐⭐ Great product *by K***Z on September 9, 2025* Awesome design, Much more secure than the sale style. really liked how easy it was to install. In my situation I was literally able to just cut across where I drilled the hole for the saddle style to install and put one piece on either side and that was pretty much it. But that's been my case in another situation it may no work. Verify if it'll work for you. Price in my opinion is a bit steep but it worked so can't complain about that. It fit my application at 1-1/2" pipe just right. Too maybe 5 minutes to install. The was used on my aqua true system. ### ⭐⭐⭐⭐⭐ Great fit, easy install *by D***E on December 4, 2025* Fit great and does not leak, fixed my ro problem ## Frequently Bought Together - Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting for Reverse Osmosis filter (ET112-001, 12-25QC, DLA-12) - Drain Line Adapter (DLA) With 1/4-inch Quick Connect Fitting for a Water Filter and 7/8-inch Fitting for a Dishwasher (ET116-001, D-25QC, DLA-D) - Drain Line Adapter (DLA) with 1/4-inch Quick Connect Fitting (ET109-001, 9-25QC, DLA-9) --- ## 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.co.uk/products/89258804-drain-line-adapter-dla-with-1-4-inch-quick-connect](https://www.desertcart.co.uk/products/89258804-drain-line-adapter-dla-with-1-4-inch-quick-connect) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-18*