{"title":"Drainage Kits, Ag Pipe \u0026 Weep Holes","description":"\u003cp\u003eComplete \u003cstrong\u003eretaining wall drainage kits\u003c\/strong\u003e — ag pipe, geotextile fabric, and weep holes — essential for every concrete sleeper retaining wall. Drainage failure is the leading cause of retaining wall failure in Australia. Don't skip it. Delivered Australia-wide.\u003c\/p\u003e\u003cp\u003eBefore ordering, read our \u003ca href=\"\/blogs\/retaining-wall-advice\/retaining-wall-drainage-guide\"\u003eretaining wall drainage guide\u003c\/a\u003e — it covers correct ag pipe placement, geotextile installation, weep hole spacing, and the most common drainage mistakes that cause walls to fail prematurely.\u003c\/p\u003e\u003ch2\u003eWhat's in a Drainage Kit?\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAg pipe (agricultural drainage pipe)\u003c\/strong\u003e — slotted flexible pipe laid at the base of the wall to collect and channel groundwater away\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeotextile filter fabric \/ sock\u003c\/strong\u003e — prevents fine soil particles from migrating into the drainage aggregate and blocking the system over time\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeep holes\u003c\/strong\u003e — installed through the lowest sleeper course to provide a secondary drainage path at the wall face\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhy Drainage Is Non-Negotiable\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePrevents hydrostatic pressure\u003c\/strong\u003e — the number one cause of retaining wall failure in Australia\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired by most councils\u003c\/strong\u003e — drainage is mandated for walls over 600mm in most Australian states. Check your \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 entire wall system\u003c\/strong\u003e — reduces moisture exposure on sleepers, posts, and footings\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eComplete Your Retaining Wall System\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/concrete-sleepers\"\u003econcrete retaining wall sleepers\u003c\/a\u003e — steel-reinforced sleepers in charcoal, woodgrain, and smooth finish\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 posts, hot-dip galvanised as standard\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/collections\/steel-posts\/h-beam\"\u003eH beam retaining wall posts\u003c\/a\u003e — for walls over 1.2m or engineer-specified applications\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/drainage-kit-for-retaining-walls\"\u003edrainage kit for retaining walls\u003c\/a\u003e — everything in one order: ag pipe, geotextile, and weep holes\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/blogs\/retaining-wall-advice\/retaining-wall-drainage-guide\"\u003eretaining wall drainage guide\u003c\/a\u003e — step-by-step installation guide with common mistakes to avoid\u003c\/li\u003e\n\u003c\/ul\u003e","products":[{"product_id":"drainage-kit-for-retaining-walls","title":"Drainage Kit for Retaining Walls — Ag Pipe, Gravel \u0026 Geotextile","description":"\u003cp\u003e\u003cstrong\u003eA complete retaining wall drainage kit — ag pipe, geotextile fabric and the components you need to build a working drainage system behind the wall in one order.\u003c\/strong\u003e Drainage is the number-one factor in a wall's lifespan. Delivered Australia-wide by Retaining Walls Direct.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eWritten and product-checked by the Retaining Walls Direct team — supplying retaining wall drainage products across Australia. Last updated: June 2026.\u003c\/em\u003e\u003c\/p\u003e\u003ch2\u003eRetaining wall drainage kit\u003c\/h2\u003e\u003cp\u003eWater building up behind a wall is the most common cause of failure. This kit bundles the drainage essentials so you don't miss a component. A typical system: \u003ca href=\"\/products\/geo-matting\"\u003egeotextile fabric\u003c\/a\u003e against the soil → clean \u003ca href=\"\/products\/20mm-drainage-aggregate-for-retaining-walls\"\u003edrainage aggregate\u003c\/a\u003e → \u003ca href=\"\/products\/ag-pipe-100mm-x-20m-slotted-socked-drain-coil\"\u003eag pipe\u003c\/a\u003e at the footing → discharge to a legal outlet. See the \u003ca href=\"\/blogs\/retaining-wall-advice\/retaining-wall-drainage-guide\"\u003edrainage guide\u003c\/a\u003e.\u003c\/p\u003e\u003ch3\u003eWhy it matters\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRelieves hydrostatic pressure that cracks, leans or topples walls.\u003c\/li\u003e\n\u003cli\u003eKeeps the drainage zone clean so it keeps working long-term.\u003c\/li\u003e\n\u003cli\u003eAligns with AS 4678 drainage principles.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eBuying with confidence\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAustralia-wide delivery\u003c\/strong\u003e with a same-day freight quote.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoogle-reviewed service\u003c\/strong\u003e and trade support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturns:\u003c\/strong\u003e see our \u003ca href=\"\/pages\/returns-delivery-refund-policy\"\u003ereturns \u0026amp; delivery policy\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003ca href=\"\/pages\/book-a-quote\"\u003eGet a quote\u003c\/a\u003e or \u003ca href=\"\/pages\/contact-retaining-wall-direct\"\u003econtact the team\u003c\/a\u003e to match the kit to your wall length.\u003c\/p\u003e\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhy do I need drainage?\u003c\/strong\u003e\u003cbr\u003eIt relieves the water pressure behind the wall that's the leading cause of failure.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's in a drainage system?\u003c\/strong\u003e\u003cbr\u003eGeotextile fabric, clean aggregate and ag pipe discharging to a legal outlet.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan you deliver to me?\u003c\/strong\u003e\u003cbr\u003eWe deliver across most of Australia. \u003ca href=\"\/pages\/book-a-quote\"\u003eSend your details\u003c\/a\u003e for a quote.\u003c\/p\u003e","brand":"Retaining Walls Direct","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\/retaining-wall-drainage-kit-ag-pipe-geotextile.png?v=1782364747"},{"product_id":"ag-pipe-100mm-x-20m-slotted-socked-drain-coil","title":"Ag Pipe 100mm x 20m | Slotted \u0026 Socked Drain Coil","description":"\u003cp\u003e\u003cstrong\u003eAg pipe (100mm × 20m flexible drain coil) runs along the base of a retaining wall to collect groundwater and carry it away — the part that stops water pressure building behind the wall.\u003c\/strong\u003e Choose slotted or socked (filter-sock). Delivered Australia-wide by Retaining Walls Direct.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWritten and product-checked by the Retaining Walls Direct team — supplying retaining wall drainage products across Australia. Last updated: June 2026.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003eAg pipe 100mm × 20m\u003c\/h2\u003e\n\u003cp\u003eLaid at the footing behind a \u003ca href=\"\/collections\/concrete-sleepers\"\u003econcrete sleeper wall\u003c\/a\u003e, surrounded by gravel and \u003ca href=\"\/products\/geo-matting\"\u003egeo matting\u003c\/a\u003e, ag pipe discharges water to a legal outlet. Essential on any wall over ~600mm. See the \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-guide\"\u003edrainage guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eSlotted vs socked\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSlotted\u003c\/strong\u003e — use when wrapped in geo matting or surrounded by clean gravel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSocked\u003c\/strong\u003e — pre-wrapped filter sock keeps fines out; ideal for sandy or loamy soils.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eSize\u003c\/th\u003e\n\u003ctd\u003e100mm diameter × 20m coil\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOptions\u003c\/th\u003e\n\u003ctd\u003eSlotted · Socked (filter sock)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eFlexible HDPE\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRetaining Walls Direct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eComplete the drainage system\u003c\/h3\u003e\n\u003cp\u003ePair with \u003ca href=\"\/products\/geo-matting\"\u003egeo matting\u003c\/a\u003e and gravel, or a complete \u003ca href=\"\/products\/drainage-kit-for-retaining-walls\"\u003edrainage kit\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eBuying with confidence\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAustralia-wide delivery\u003c\/strong\u003e with a same-day freight quote.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoogle-reviewed service\u003c\/strong\u003e and trade support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturns:\u003c\/strong\u003e see our \u003ca href=\"\/pages\/returns-delivery-refund-policy\"\u003ereturns \u0026amp; delivery policy\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/book-a-quote\"\u003eGet a quote\u003c\/a\u003e or \u003ca href=\"\/pages\/contact-retaining-wall-direct\"\u003econtact the team\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eSlotted or socked?\u003c\/strong\u003e\u003cbr\u003eSocked (filter sock) for sandy\/loamy soils; slotted when wrapped in geo matting or clean gravel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need ag pipe?\u003c\/strong\u003e\u003cbr\u003eYes for any wall over ~600mm — it's the base of a working drainage system.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you deliver to me?\u003c\/strong\u003e\u003cbr\u003eWe deliver across most of Australia. \u003ca href=\"\/pages\/book-a-quote\"\u003eSend your details\u003c\/a\u003e for a quote.\u003c\/p\u003e","brand":"Retaining Walls Direct","offers":[{"title":"Agi Pipe Slotted 100mm dia x 20m","offer_id":52288005308696,"sku":"AGSLOT","price":115.95,"currency_code":"AUD","in_stock":true},{"title":"Agi Pipe Socked 100mm dia x 20m","offer_id":52288005341464,"sku":"AGGSOCK","price":142.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/ag-pipe-100mm-slotted-drain-coil.webp?v=1782364746"},{"product_id":"20mm-drainage-aggregate-for-retaining-walls","title":"20mm Drainage Aggregate for Retaining Walls","description":"\u003cp\u003e\u003cstrong\u003e20mm clean crushed drainage aggregate is the free-draining backfill that sits behind a retaining wall — it channels groundwater down to the ag pipe and relieves the water pressure that causes walls to fail.\u003c\/strong\u003e By the 25kg bag or the cubic metre. Delivered Australia-wide by Retaining Walls Direct.\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003eWritten and product-checked by the Retaining Walls Direct team — supplying retaining wall drainage products across Australia. Last updated: June 2026.\u003c\/em\u003e\u003c\/p\u003e\n\n\u003ch2\u003e20mm drainage aggregate\u003c\/h2\u003e\n\u003cp\u003ePacked behind a \u003ca href=\"\/collections\/concrete-sleepers\"\u003econcrete sleeper wall\u003c\/a\u003e between the posts and the \u003ca href=\"\/collections\/geotextile-fabric-retaining-walls\"\u003egeotextile fabric\u003c\/a\u003e, the aggregate creates the drainage zone. Without it, even a perfectly built wall will eventually fail. See the \u003ca href=\"\/blogs\/news\/retaining-wall-drainage-guide\"\u003edrainage guide\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eHow much do I need?\u003c\/h3\u003e\n\u003cp\u003eAs a guide, allow roughly \u003cstrong\u003e0.15–0.20m³ per lineal metre\u003c\/strong\u003e of wall (300mm drainage zone). Use the \u003ca href=\"\/pages\/retaining-wall-calculator\"\u003eretaining wall calculator\u003c\/a\u003e for your dimensions.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003e20mm clean crushed drainage aggregate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSupply\u003c\/th\u003e\n\u003ctd\u003e25kg bag · 1m³ (cubic metre)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUse\u003c\/th\u003e\n\u003ctd\u003eFree-draining backfill behind retaining walls\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eRetaining Walls Direct\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eComplete the drainage system\u003c\/h3\u003e\n\u003cp\u003ePair with \u003ca href=\"\/products\/ag-pipe-100mm-x-20m-slotted-socked-drain-coil\"\u003eag pipe\u003c\/a\u003e and \u003ca href=\"\/products\/geo-matting\"\u003egeo matting\u003c\/a\u003e, or a complete \u003ca href=\"\/products\/drainage-kit-for-retaining-walls\"\u003edrainage kit\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eBuying with confidence\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAustralia-wide delivery\u003c\/strong\u003e with a same-day freight quote.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGoogle-reviewed service\u003c\/strong\u003e and trade support.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReturns:\u003c\/strong\u003e see our \u003ca href=\"\/pages\/returns-delivery-refund-policy\"\u003ereturns \u0026amp; delivery policy\u003c\/a\u003e.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/pages\/book-a-quote\"\u003eGet a quote\u003c\/a\u003e or \u003ca href=\"\/pages\/contact-retaining-wall-direct\"\u003econtact the team\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003eFrequently asked questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow much do I need?\u003c\/strong\u003e\u003cbr\u003eAbout 0.15–0.20m³ per lineal metre of wall — use the calculator.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eBag or bulk?\u003c\/strong\u003e\u003cbr\u003e25kg bags for small jobs\/top-ups; 1m³ for full walls.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan you deliver to me?\u003c\/strong\u003e\u003cbr\u003eWe deliver across most of Australia. \u003ca href=\"\/pages\/book-a-quote\"\u003eSend your details\u003c\/a\u003e for a quote.\u003c\/p\u003e","brand":"Retaining Walls Direct","offers":[{"title":"25kg Bag","offer_id":52321685438744,"sku":"AGG-25KG","price":9.95,"currency_code":"AUD","in_stock":true},{"title":"1m³ (Cubic Metre)","offer_id":52321685471512,"sku":"AGG-1M3","price":244.95,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/files\/20mm-drainage-aggregate-retaining-walls.jpg?v=1782364747"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0952\/5595\/3688\/collections\/drainage-kits-ag-pipe-weep-holes.png?v=1779312231","url":"https:\/\/www.retainingwallsdirect.com.au\/collections\/drainage-kits-ag-pipe-weep-holes.oembed","provider":"Retaining Walls Direct","version":"1.0","type":"link"}