{"title":"Ag Pipe for Retaining Walls","description":"\u003ch2\u003eAg Pipe for Retaining Walls — Agricultural Drainage Pipe for Correct Wall Drainage\u003c\/h2\u003e\u003cp\u003eAgricultural drainage pipe — commonly called ag pipe — is the primary drainage component installed behind a concrete sleeper retaining wall. Laid at the base of the drainage aggregate layer, ag pipe collects groundwater and surface water that infiltrates behind the wall and channels it to a safe discharge point, preventing hydrostatic pressure buildup that causes walls to lean, crack, and fail.\u003c\/p\u003e\u003ch3\u003eHow Ag Pipe Works in a Retaining Wall\u003c\/h3\u003e\u003cp\u003eAg pipe is a perforated flexible pipe wrapped in a geotextile sock that allows water to enter while filtering out fine soil particles. It is laid at the base of the wall on a bed of drainage aggregate (typically 20mm crushed rock), sloped to drain to a discharge point at the end of the wall or through a stormwater connection.\u003c\/p\u003e\u003ch3\u003eAg Pipe Installation Guidelines\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eLay ag pipe at the base of the wall, sloped at a minimum 1:100 fall to the discharge point\u003c\/li\u003e\n\u003cli\u003eSurround with a minimum 200mm of 20mm drainage aggregate on all sides\u003c\/li\u003e\n\u003cli\u003eWrap the entire drainage aggregate zone in \u003ca href=\"\/collections\/geotextile-fabric-retaining-walls\"\u003egeotextile fabric\u003c\/a\u003e to prevent soil migration\u003c\/li\u003e\n\u003cli\u003eInstall \u003ca href=\"\/collections\/weep-holes\"\u003eweep holes\u003c\/a\u003e through the wall face as a secondary drainage relief\u003c\/li\u003e\n\u003cli\u003eDischarge to a stormwater pit, kerb, or approved drainage point — never onto a neighbouring property\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eRead our \u003ca href=\"\/blogs\/news\/ag-pipe-retaining-walls-guide\"\u003eAg Pipe Installation Guide\u003c\/a\u003e and \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-structural-integrity-the-complete-australian-guide-2026\"\u003eComplete Drainage Guide\u003c\/a\u003e for full detail. See our full \u003ca href=\"\/collections\/drainage-kits-ag-pipe-weep-holes\"\u003eDrainage Kits range\u003c\/a\u003e for complete drainage solutions.\u003c\/p\u003e","products":[{"product_id":"drainage-kit-for-retaining-walls","title":"Drainage Kit for Retaining Walls","description":"\u003ch2\u003eDrainage Kit for Retaining Walls\u003c\/h2\u003e\u003cp\u003eWater is the number one enemy of any retaining wall. Without proper drainage, hydrostatic pressure builds up behind the wall, causing bowing, cracking, and eventual failure — no matter how strong your sleepers and posts are. Our \u003cstrong\u003eDrainage Kit for Retaining Walls\u003c\/strong\u003e is the professional solution to manage water behind your wall and protect your investment for decades.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eBefore installation, read our \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-guide\"\u003eretaining wall drainage guide\u003c\/a\u003e\u003c\/strong\u003e — it covers correct ag pipe placement, geotextile fabric installation, weep hole spacing, and the most common drainage mistakes that cause walls to fail prematurely.\u003c\/p\u003e\u003ch3\u003eWhat's Included?\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAg pipe (agricultural drainage pipe)\u003c\/strong\u003e — perforated flexible pipe that collects and channels groundwater away from the wall base\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeotextile filter sock\u003c\/strong\u003e — wraps the ag pipe to prevent soil ingress and blockage over time\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDrainage aggregate \/ blue metal\u003c\/strong\u003e — coarse gravel backfill that allows water to flow freely to the ag pipe (quantity varies by kit size)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEnd caps and connectors\u003c\/strong\u003e — for clean termination and connection of drainage runs\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhy Drainage Is Non-Negotiable\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents hydrostatic pressure\u003c\/strong\u003e — the leading cause of retaining wall failure in Australia\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired by most councils\u003c\/strong\u003e — drainage behind retaining walls is mandated in most Australian states for walls over 600mm. Check your local \u003ca href=\"\/pages\/regulations-compliance-faq-hub\"\u003eretaining wall permit requirements\u003c\/a\u003e before you build.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProtects your sleepers and posts\u003c\/strong\u003e — reduces moisture exposure and extends the life of all wall components\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to install\u003c\/strong\u003e — lay ag pipe at the base of the wall during construction, backfill with aggregate, and you're done\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eInstallation Tips\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePlace ag pipe at the base of the wall, sloping to a discharge point (minimum 1:100 fall)\u003c\/li\u003e\n\u003cli\u003eWrap in geotextile sock before backfilling with aggregate\u003c\/li\u003e\n\u003cli\u003eBackfill with 20mm blue metal or drainage aggregate for at least 300mm behind the wall\u003c\/li\u003e\n\u003cli\u003eEnsure discharge point is clear of structures and directs water away from the site\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eComplete Your Wall System\u003c\/h3\u003e\u003cp\u003ePair with our full range of sleepers, posts, and accessories:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/concrete-sleepers\"\u003eConcrete retaining wall sleepers\u003c\/a\u003e — steel-reinforced, 50+ year lifespan\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/steel-posts\"\u003eGalvanised steel retaining wall posts\u003c\/a\u003e — C-channel and H-beam, hot-dip galvanised as standard\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/drainage-kits-ag-pipe-weep-holes\/weep-holes\"\u003eWeep holes for retaining walls\u003c\/a\u003e — secondary drainage path at the wall face\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/collections\/retaining-wall-accessories-rwd\"\u003eAll Retaining Wall Accessories\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/pages\/book-a-quote\"\u003eBook a Free Quote\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Retaining Wall Store","offers":[{"title":"Default Title","offer_id":52045126140184,"sku":null,"price":80.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/image_e46f3b0b-4889-4337-9710-aff868ab412e.png?v=1778403048"}],"url":"https:\/\/www.retainingwallsdirect.com.au\/collections\/ag-pipe-for-retaining-walls.oembed","provider":"Retaining Walls Direct","version":"1.0","type":"link"}