{"id":1641,"date":"2023-11-28T09:00:17","date_gmt":"2023-11-28T09:00:17","guid":{"rendered":"https:\/\/www.gladesvilleplumbing.com.au\/?p=1641"},"modified":"2023-11-30T01:00:38","modified_gmt":"2023-11-30T01:00:38","slug":"drainage-fall-ratio","status":"publish","type":"post","link":"https:\/\/www.gladesvilleplumbing.com.au\/drainage-fall-ratio\/","title":{"rendered":"What is Drainage Fall Ratio and How Do You Calculate It?"},"content":{"rendered":"<h2 aria-level=\"1\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-large wp-image-1642\" src=\"https:\/\/www.gladesvilleplumbing.com.au\/wp-content\/uploads\/2022\/01\/GPS-Jan22-Drainage-fall-ratio-1024x749.jpg\" alt=\"Installing plumbing with correct drainage fall ratio\" width=\"1024\" height=\"749\" srcset=\"https:\/\/www.gladesvilleplumbing.com.au\/wp-content\/uploads\/2022\/01\/GPS-Jan22-Drainage-fall-ratio.jpg 1024w, https:\/\/www.gladesvilleplumbing.com.au\/wp-content\/uploads\/2022\/01\/GPS-Jan22-Drainage-fall-ratio-300x219.jpg 300w, https:\/\/www.gladesvilleplumbing.com.au\/wp-content\/uploads\/2022\/01\/GPS-Jan22-Drainage-fall-ratio-768x562.jpg 768w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/h2>\n<p>Sydney homeowners and renovators, do you know what drainage fall ratio is and how to calculate it? Don\u2019t jump into a bathroom renovation or fix your drainage system without an expert!<\/p>\n<p><strong>Tips from the expert:<\/strong> After over 20 years of doing Sydney\u2019s plumbing, I\u2019ve seen all kinds of shoddy plumbing. Trust me, work done by a DIYer, handyman or unlicensed plumber will end up costing you a lot more time, money and stress. My best advice is to hire a trained and licensed plumber so that drainage fall ratio can be calculated and drains installed correctly and safely according to local regulations. I have seen every kind of plumbing problem \u2013 and a waste water problem is one that you just don\u2019t want to see.<\/p>\n<h2 aria-level=\"1\"><span data-contrast=\"auto\">T<\/span><span data-contrast=\"auto\">he Importance of Correct Drainage Fall Ratio<\/span><\/h2>\n<p><span data-contrast=\"auto\">Drainage fall ratio is a term used to calculate the gradient in which a drain pipe must be installed to ensure waste can flow away easily from the home. It\u2019s a term and calculation a plumber will use every day when installing drainage to a home.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">To calculate drainage fall ratio, you need to understand a few things.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<h2><span data-contrast=\"auto\">What is Drainage Fall Ratio?<\/span><\/h2>\n<p><a href=\"https:\/\/emedia.rmit.edu.au\/dlsweb\/Toolbox\/plumbing\/toolbox12_01\/units\/cpcpdr4001a_sanitary\/03_size\/page_001.htm\"><span data-contrast=\"none\">Drainage fall ratio<\/span><\/a><span data-contrast=\"auto\"> is the slope in which a drain pipe needs to be laid to ensure adequate fall. Sewer pipes require a certain ratio of fall to ensure waste is able to travel away from the property to the sewer main. The ratio is dependent on the diameter of pipe and the length from where it connects to the fixture and to a connected point of discharge into the sewer.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<h2>How is Drainage Fall calculated?<\/h2>\n<p><span data-contrast=\"auto\">Plumbers are trained to calculate the drainage fall ratio when installing drainage to a home. Often a hydraulic consultant will calculate the ratio on a plan for a plumber to follow.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">The minimum grade of fall for sewer pipes in Australia is 1.65% which equates to a ratio of 1:60. Most drainage pipes will be 100mm. If the diameter is smaller, the ratio will be different.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<h2><span data-contrast=\"auto\">What happens if the wrong drainage fall ratio is calculated?<\/span><\/h2>\n<p><span data-contrast=\"auto\">Plumbers will use levels to determine if the right fall has been achieved when installing drainage pipes. In some shires of Australia, a council inspection is warranted to ensure the right gradient has been installed.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">If the wrong drainage fall ratio has been calculated and therefore installed to a property, there can be two problems.<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<ul>\n<li><span data-contrast=\"auto\">Not enough fall will mean waste won\u2019t flush away as it should and can potentially cause constant blockages.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<li><span data-contrast=\"auto\">Too much fall can cause siphonage and gurgling of pipes as waste water travels too quickly down the pipe.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/li>\n<\/ul>\n<h2>How do you get the right gradient for your drainage?<\/h2>\n<p><span data-contrast=\"auto\">To get the right gradient for drainage to your home, use a licensed plumber. This is what they have been trained in and have the knowledge on; not only how to calculate the gradient of fall correctly but install it to Australian standards.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">Drainage which has been installed by an unlicensed person can incur fines, and should the work cause damage to your home, it will be a claim denied by insurance as they must abide by Australian laws.\u00a0<\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"auto\">If you are looking to add a new bathroom or install an <\/span><a href=\"https:\/\/www.gladesvilleplumbing.com.au\/toilet-installation\/\"><span data-contrast=\"none\">additional toilet<\/span><\/a><span data-contrast=\"auto\">, drainage will be a major part of the renovation.\u00a0 Book a licensed plumbing professional and ensure your beautiful new bathroom renovation doesn&#8217;t cost you extra in the long term.<\/span><\/p>\n<h3 style=\"text-align: center;\"><a href=\"https:\/\/www.gladesvilleplumbing.com.au\/contact-us\/\"><span data-contrast=\"none\">Contact Gladesville Plumbing<\/span><\/a><span data-contrast=\"auto\"> for a quote<br \/>\nand ensure your drainage is installed right the first time. <\/span><span data-ccp-props=\"{&quot;201341983&quot;:0,&quot;335559739&quot;:200,&quot;335559740&quot;:276}\">\u00a0<\/span><\/h3>\n","protected":false},"excerpt":{"rendered":"<p>Sydney homeowners and renovators, do you know what drainage fall ratio is and how to calculate it? Don\u2019t jump into<\/p>\n","protected":false},"author":1,"featured_media":1642,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[3],"tags":[21,22],"class_list":["post-1641","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-drainage-fall","tag-sewer-pipe-installation"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>What is Drainage Fall Ratio and How Do You Calculate It?<\/title>\n<meta name=\"description\" content=\"Drainage fall is crucial to ensure the flow of sewerage away from the fixtures in your house. 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