{"product_id":"ag-pipe-100mm-x-20m-slotted-socked-drain-coil","title":"Ag Pipe 100mm x 20m | Slotted \u0026 Socked Drain Coil","description":"\u003ch2\u003eAg Pipe 100mm x 20m\u003c\/h2\u003e\n\n\u003cp\u003eAg Pipe is an essential drainage product used behind concrete sleeper retaining walls to collect and move excess water away from the wall. By helping reduce water build-up behind the sleepers, ag pipe plays an important role in reducing hydrostatic pressure, improving wall performance, and helping prevent drainage-related retaining wall issues.\u003c\/p\u003e\n\n\u003cp\u003eAvailable in \u003cstrong\u003e100mm slotted drain coil\u003c\/strong\u003e and \u003cstrong\u003e100mm slotted drain coil with socking\u003c\/strong\u003e, this 20m agricultural drainage pipe is suitable for retaining walls, garden drainage, landscape drainage, low-lying areas, and general site drainage where water needs to be redirected to a suitable outlet.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct type:\u003c\/strong\u003e Agricultural drainage pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCommon name:\u003c\/strong\u003e Ag pipe or drainage coil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDiameter:\u003c\/strong\u003e 100mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLength:\u003c\/strong\u003e 20m coil\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAvailable options:\u003c\/strong\u003e Slotted drain coil and slotted drain coil with socking\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Retaining wall drainage, landscape drainage, garden drainage, and water redirection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e Collects water from the drainage zone and carries it to a suitable outlet\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation location:\u003c\/strong\u003e Typically installed at the base of the retaining wall behind the sleepers\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\n\u003ctable style=\"width:100%; border-collapse:collapse;\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px; text-align:left;\"\u003eOption\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px; text-align:left;\"\u003eSize\u003c\/th\u003e\n\u003cth style=\"border:1px solid #ddd; padding:8px; text-align:left;\"\u003eBest Use\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eSlotted Ag Pipe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e100mm diameter x 20m coil\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eGeneral retaining wall drainage where the pipe will be used with a properly lined drainage zone and clean drainage aggregate.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e\u003cstrong\u003eSocked Ag Pipe\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003e100mm diameter x 20m coil\u003c\/td\u003e\n\u003ctd style=\"border:1px solid #ddd; padding:8px;\"\u003eRecommended where extra filtration is required to help stop fine soil particles entering the pipe slots and causing blockages.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eTechnical Overview\u003c\/h3\u003e\n\n\u003cp\u003eAg pipe is installed behind a retaining wall at the base of the drainage zone. Water that moves through the free-draining aggregate behind the wall enters the slotted pipe and is carried away to a legal discharge point. This helps stop water from sitting behind the wall and increasing pressure on the sleepers and steel posts.\u003c\/p\u003e\n\n\u003cp\u003eFor concrete sleeper retaining walls, ag pipe should normally be used with drainage gravel and geotextile fabric. The drainage gravel allows water to move freely down to the pipe, while geotextile fabric helps stop fine soil from migrating into the drainage layer. Without proper drainage, water pressure can build up behind the wall and may contribute to movement, leaning, cracking, or wall failure.\u003c\/p\u003e\n\n\u003ch3\u003eSlotted vs Socked Ag Pipe\u003c\/h3\u003e\n\n\u003cp\u003e\u003cstrong\u003eSlotted Ag Pipe\u003c\/strong\u003e has openings that allow water to enter the pipe from the surrounding drainage gravel. It is a practical option for retaining wall drainage where the drainage zone is properly built using clean aggregate and geotextile fabric.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eSocked Ag Pipe\u003c\/strong\u003e includes a filter sock around the pipe. The sock provides an added filtration layer to help reduce silt and fine soil entering the pipe through the slots. This is often the better option for retaining walls, clay-heavy sites, silty soils, or drainage systems where long-term blockage resistance is important.\u003c\/p\u003e\n\n\u003ch3\u003eWhy Ag Pipe Matters Behind Retaining Walls\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduces water pressure:\u003c\/strong\u003e Helps move water away from behind the wall and reduce hydrostatic pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects wall structure:\u003c\/strong\u003e Supports the long-term performance of concrete sleepers, steel posts, and footings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHelps prevent water logging:\u003c\/strong\u003e Moves excess water away from the retained soil and drainage zone.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproves drainage reliability:\u003c\/strong\u003e Works with gravel and geotextile fabric to create a proper drainage system.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for 20m runs:\u003c\/strong\u003e Supplied as a 20m coil for common residential and landscape drainage projects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSocked option available:\u003c\/strong\u003e Provides additional filtration where fine soil or silt may block the pipe over time.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCommon Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eConcrete sleeper retaining wall drainage\u003c\/li\u003e\n\u003cli\u003eGarden drainage\u003c\/li\u003e\n\u003cli\u003eLandscape drainage\u003c\/li\u003e\n\u003cli\u003eBoundary wall drainage\u003c\/li\u003e\n\u003cli\u003eDriveway and path drainage\u003c\/li\u003e\n\u003cli\u003eLow-lying yard areas\u003c\/li\u003e\n\u003cli\u003eDrainage behind raised garden beds\u003c\/li\u003e\n\u003cli\u003eDrainage systems using gravel and geotextile fabric\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation Considerations\u003c\/h3\u003e\n\n\u003cp\u003eAg pipe should be installed at the base of the retaining wall drainage zone, behind the sleepers, with the slots positioned to collect water from the surrounding aggregate. The pipe should be laid with a continuous fall toward a suitable outlet so water can drain away by gravity.\u003c\/p\u003e\n\n\u003cp\u003eA typical retaining wall drainage system includes free-draining aggregate behind the wall, geotextile fabric to separate soil from the drainage layer, and ag pipe at the base of the wall. The pipe should not discharge into an unsuitable area where water can return behind the wall or affect neighbouring property.\u003c\/p\u003e\n\n\u003cp\u003eFor retaining walls in clay soil, silty soil, or areas with poor drainage, socked ag pipe is often preferred because the filter sock helps reduce the risk of fine particles entering and blocking the pipe. Even with socked pipe, the drainage zone should still be built correctly with clean aggregate and geotextile fabric.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Products\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrainage kit:\u003c\/strong\u003e \u003ca href=\"\/products\/drainage-kit-for-retaining-walls\"\u003eDrainage Kit for Retaining Walls\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFabric and wall protection:\u003c\/strong\u003e \u003ca href=\"\/products\/geotextile-fabric-wall-liner-for-retaining-walls\"\u003eGeotextile Fabric and Wall Liner for Retaining Walls\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eConcrete sleeper range:\u003c\/strong\u003e \u003ca href=\"\/collections\/concrete-sleepers\"\u003eConcrete Retaining Wall Sleepers\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSteel post range:\u003c\/strong\u003e \u003ca href=\"\/collections\/steel-posts\"\u003eSteel Retaining Wall Posts\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eGuides and Resources\u003c\/h3\u003e\n\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAg pipe guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/ag-pipe-retaining-walls-guide\"\u003eAg Pipe for Retaining Walls: Size, Installation and Tips\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrainage guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-guide\"\u003eRetaining Wall Drainage Guide\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeotextile guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/geotextile-fabric-retaining-walls-guide\"\u003eGeotextile Fabric for Retaining Walls: What It Does and How to Use It\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackfill guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/retaining-wall-backfill-guide\"\u003eRetaining Wall Backfill: What to Use and How to Compact It\u003c\/a\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstallation guide:\u003c\/strong\u003e \u003ca href=\"\/blogs\/news\/how-to-build-concrete-sleeper-retaining-wall\"\u003eHow to Build a Concrete Sleeper Retaining Wall\u003c\/a\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDelivery\u003c\/h3\u003e\n\n\u003cp\u003eAg Pipe is available in 100mm x 20m slotted and socked options. Delivery is available across Sydney, Melbourne, Brisbane, Perth, Adelaide, Canberra, Gold Coast, and regional Australia. \u003ca href=\"\/pages\/book-a-quote\"\u003eGet a free quote\u003c\/a\u003e for your drainage materials.\u003c\/p\u003e\n","brand":"Retaining Walls Direct","offers":[{"title":"Agi Pipe Slotted 100mm dia x 20m","offer_id":52288005308696,"sku":null,"price":115.54,"currency_code":"AUD","in_stock":true},{"title":"Agi Pipe Socked 100mm dia x 20m","offer_id":52288005341464,"sku":null,"price":142.16,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/AG-Pipe-Slotted-Drain-Coil-600x600.webp?v=1781591144","url":"https:\/\/www.retainingwallsdirect.com.au\/products\/ag-pipe-100mm-x-20m-slotted-socked-drain-coil","provider":"Retaining Walls Direct","version":"1.0","type":"link"}