{"id":9282,"date":"2026-01-27T10:41:51","date_gmt":"2026-01-27T10:41:51","guid":{"rendered":"https:\/\/prudenceeng.lk\/shop\/?post_type=product&#038;p=9282"},"modified":"2026-04-10T10:11:09","modified_gmt":"2026-04-10T10:11:09","slug":"12-18mm-pebbles-price-in-sri-lanka","status":"publish","type":"product","link":"https:\/\/prudenceeng.lk\/shop\/12-18mm-pebbles-price-in-sri-lanka\/","title":{"rendered":"12\u201318mm Pebbles"},"content":{"rendered":"<p><b class=\"\" data-path-to-node=\"3\" data-index-in-node=\"0\">12\u201318mm Pebbles Filter Media \u2013 High-Purity Silica Support Gravel for Water Treatment Plants &amp; Industrial Multigrade Filters<\/b><\/p>\n<h3 data-path-to-node=\"10\"><b data-path-to-node=\"10\" data-index-in-node=\"0\">The Foundation of Reliable Filtration<\/b><\/h3>\n<p data-path-to-node=\"11\"><span class=\"citation-75\">The <\/span><b data-path-to-node=\"11\" data-index-in-node=\"4\"><span class=\"citation-75\">12\u201318mm Pebble<\/span><\/b><span class=\"citation-75\"> layer is an indispensable component of any professional <\/span><b data-path-to-node=\"11\" data-index-in-node=\"75\"><span class=\"citation-75\">multi-media or pressure sand filter<\/span><\/b><span class=\"citation-75 citation-end-75\">.<\/span> Placed directly above the coarsest gravel or underdrain laterals, this specific 12\u201318mm grade acts as a &#8220;transition zone&#8221; that maintains the structural integrity of the filter bed even during intense backwash cycles.<\/p>\n<h3 data-path-to-node=\"12\"><b data-path-to-node=\"12\" data-index-in-node=\"0\">Key Features &amp; Benefits:<\/b><\/h3>\n<ul data-path-to-node=\"13\">\n<li>\n<p data-path-to-node=\"13,0,0\"><b data-path-to-node=\"13,0,0\" data-index-in-node=\"0\"><span class=\"citation-74\">Superior Flow Dynamics:<\/span><\/b><span class=\"citation-74 citation-end-74\"> The naturally rounded to sub-angular shape of these pebbles reduces friction and pressure loss, allowing water to pass through the lower layers of the tank efficiently.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,1,0\"><b data-path-to-node=\"13,1,0\" data-index-in-node=\"0\">Prevents Media Migration:<\/b> Carefully sized to bridge the gap between heavy base gravel and finer 2-4mm grit, ensuring that your expensive top-layer media (like activated carbon or fine sand) stays exactly where it belongs.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,2,0\"><b data-path-to-node=\"13,2,0\" data-index-in-node=\"0\"><span class=\"citation-73\">Chemical Stability:<\/span><\/b><span class=\"citation-73\"> Consisting of over 92% silica (SiO\u2082), these pebbles are <\/span><b data-path-to-node=\"13,2,0\" data-index-in-node=\"76\"><span class=\"citation-73\">chemically inert<\/span><\/b><span class=\"citation-73 citation-end-73\">.<\/span> <span class=\"citation-72 citation-end-72\">They do not react with water treatment chemicals, ensuring the water remains safe for potable use without pH fluctuations.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,3,0\"><b data-path-to-node=\"13,3,0\" data-index-in-node=\"0\">High Mechanical Strength:<\/b><span class=\"citation-71 citation-end-71\"> Unlike ordinary stones, these siliceous pebbles are dense and durable.<\/span> They resist the mechanical wear caused by backwashing and air scouring, meaning they rarely need replacement over the life of the filter.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"13,4,0\"><b data-path-to-node=\"13,4,0\" data-index-in-node=\"0\">Consistent Quality Control:<\/b> Each batch is processed through rigorous washing and kiln-drying to adhere to industrial standards (like ANSI\/AWWA B100), ensuring the media arrives ready for immediate installation.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"14\"><b data-path-to-node=\"14\" data-index-in-node=\"0\">Typical Applications in Sri Lanka:<\/b><\/h3>\n<ul data-path-to-node=\"15\">\n<li>\n<p data-path-to-node=\"15,0,0\"><b data-path-to-node=\"15,0,0\" data-index-in-node=\"0\">Industrial Water Treatment Plants (WTP\/ETP):<\/b> Essential support bedding for municipal and factory-level purification systems.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,1,0\"><b data-path-to-node=\"15,1,0\" data-index-in-node=\"0\"><span class=\"citation-70\">Reverse Osmosis (RO) Pre-treatment:<\/span><\/b><span class=\"citation-70 citation-end-70\"> Acts as a stabilizing base in large-scale pre-filtration tanks to protect delicate RO membranes from silt and debris.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,2,0\"><b data-path-to-node=\"15,2,0\" data-index-in-node=\"0\">Swimming Pool Systems:<\/b> Used in commercial sand filters for hotels and sports complexes to manage high flow volumes.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"15,3,0\"><b data-path-to-node=\"15,3,0\" data-index-in-node=\"0\">Borehole &amp; Well Water Filtration:<\/b> Ideal for domestic large-capacity filters where raw water contains high levels of turbidity and larger sediment.<\/p>\n<\/li>\n<\/ul>\n<h3 data-path-to-node=\"16\"><b data-path-to-node=\"16\" data-index-in-node=\"0\">Technical Specifications:<\/b><\/h3>\n<table data-path-to-node=\"17\">\n<thead>\n<tr>\n<td><strong>Feature<\/strong><\/td>\n<td><strong>Detail<\/strong><\/td>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><span data-path-to-node=\"17,1,0,0\"><b data-path-to-node=\"17,1,0,0\" data-index-in-node=\"0\">Material<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,1,1,0\">Natural Siliceous Stone \/ Silica Pebble<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,2,0,0\"><b data-path-to-node=\"17,2,0,0\" data-index-in-node=\"0\">Pebble Size<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,2,1,0\">12 \u2013 18 mm<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,3,0,0\"><b data-path-to-node=\"17,3,0,0\" data-index-in-node=\"0\">Hardness<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,3,1,0\">7.0 \u2013 8.0 on MOH Scale<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,4,0,0\"><b data-path-to-node=\"17,4,0,0\" data-index-in-node=\"0\">Silica Content (SiO\u2082)<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,4,1,0\">\u2265 92.8%<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,5,0,0\"><b data-path-to-node=\"17,5,0,0\" data-index-in-node=\"0\">Specific Gravity<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,5,1,0\">2.65<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,6,0,0\"><b data-path-to-node=\"17,6,0,0\" data-index-in-node=\"0\">Bulk Density<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,6,1,0\">Approx. 1600 \u2013 1680 kg\/m\u00b3<\/span><\/td>\n<\/tr>\n<tr>\n<td><span data-path-to-node=\"17,7,0,0\"><b data-path-to-node=\"17,7,0,0\" data-index-in-node=\"0\">Packaging<\/b><\/span><\/td>\n<td><span data-path-to-node=\"17,7,1,0\">20kg \/ 25kg \/ 40kg Bags<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p data-path-to-node=\"6\">Optimize your filtration bed with our premium <b data-path-to-node=\"6\" data-index-in-node=\"46\">12\u201318mm Pebbles<\/b>. These naturally rounded, high-silica stones are specifically graded for use as a <b data-path-to-node=\"6\" data-index-in-node=\"144\">support media<\/b> in large-scale water treatment systems. <span class=\"citation-77 citation-end-77\">By forming a stable base layer, they prevent finer filter media from clogging underdrain nozzles while ensuring a high and uniform water flow rate.<\/span><\/p>\n<ul data-path-to-node=\"7\">\n<li>\n<p data-path-to-node=\"7,0,0\"><b data-path-to-node=\"7,0,0\" data-index-in-node=\"0\">Grain Size:<\/b> 12\u201318mm (Medium-Coarse Support Grade).<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,1,0\"><b data-path-to-node=\"7,1,0\" data-index-in-node=\"0\"><span class=\"citation-76\">Function:<\/span><\/b><span class=\"citation-76 citation-end-76\"> Serves as critical support bedding for sand, carbon, or resin layers.<\/span><\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,2,0\"><b data-path-to-node=\"7,2,0\" data-index-in-node=\"0\">High Purity:<\/b> Triple-washed and screened to be free from clay, dust, and organic matter.<\/p>\n<\/li>\n<li>\n<p data-path-to-node=\"7,3,0\"><b data-path-to-node=\"7,3,0\" data-index-in-node=\"0\">Durability:<\/b> Hard siliceous material (Mohs 7+) resistant to erosion and chemical degradation.<\/p>\n<\/li>\n<\/ul>\n<p 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