--- title: Roofing Tools & Equipment Blog | Hy-Tech Products | Roof Drains description: Roof Drains | Find valuable commercial roofing tool and equipment resources, including how-tos, checklists and troubleshooting tips. --- Search our inventory of drains, drain parts, safety and roofing equipment, and accessories. [Shop Now](https://hy-techroof.com/products/). - [ About ](https://www.hy-techroof.com/about-hy-tech/) - [ Contact ](https://www.hy-techroof.com/contact-hy-tech/) - - [![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com) [**](https://www.hy-techroof.com/login.php) [**](https://www.hy-techroof.com/cart.php) ** ** [![Hy-Tech Roof Products](https://resources.hy-techroof.com/hubfs/Logos/Hy-Tech%20Logo_rgb_maroon_480.png) ](https://www.hy-techroof.com) [**](https://www.hy-techroof.com/cart.php) - - Featured Post # How To Purchase A Replacement Flat Roof Drain Flat roof drains are often subjected to heavy weathering and regular wear and tear. As a result, their parts—including domes, rings, sump pans, and clamps—sometimes break, crack or rust over time,.. [ Read the Full Post ](https://resources.hy-techroof.com/blog/how-to-purchase-a-replacement-flat-roof-drain) ![](https://resources.hy-techroof.com/hubfs/miscellaneous%20drains.png) Select a Topic Roof Drains Power Supply Roofing Safety Fall Protection Garlock BUR Roof Repairs Water Flow Bitumen Roof Cutting Single-Ply [Subscribe](https://resources.hy-techroof.com/blog-subscribe) [![How To Purchase A Replacement Flat Roof Drain](https://resources.hy-techroof.com/hubfs/miscellaneous%20drains.png)](https://resources.hy-techroof.com/blog/how-to-purchase-a-replacement-flat-roof-drain) Aug 15, 2022 ###### [How To Purchase A Replacement Flat Roof Drain](https://resources.hy-techroof.com/blog/how-to-purchase-a-replacement-flat-roof-drain) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Flat roof drains are often subjected to heavy weathering and regular wear and tear. As a result, their parts—including domes, rings, sump pans, and clamps—sometimes break, crack or rust over time,... [Continue Reading](https://resources.hy-techroof.com/blog/how-to-purchase-a-replacement-flat-roof-drain) [![What Is A Retrofit Drain And How To Install One](https://resources.hy-techroof.com/hubfs/marathon-aluminator.jpeg)](https://resources.hy-techroof.com/blog/what-is-a-retrofit-drain-and-how-to-install-one) Aug 15, 2022 ###### [What Is A Retrofit Drain And How To Install One](https://resources.hy-techroof.com/blog/what-is-a-retrofit-drain-and-how-to-install-one) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) When reroofing or removing an existing drain, a replacement drain needed. This is where retrofit drains are used, as they replace the broken or corroded roof drains easily with almost no... [Continue Reading](https://resources.hy-techroof.com/blog/what-is-a-retrofit-drain-and-how-to-install-one) [![What Is The Weight Of Water?](https://resources.hy-techroof.com/hubfs/water-impact-0.jpeg)](https://resources.hy-techroof.com/blog/what-is-the-weight-of-water) Aug 15, 2022 ###### [What Is The Weight Of Water?](https://resources.hy-techroof.com/blog/what-is-the-weight-of-water) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains), [Water Flow](https://resources.hy-techroof.com/blog/topic/water-flow) All drainage systems are designed as if the piping is full of water, even though the pipe will rarely, if ever, be full. Reason being, if unaccounted for, the weight of the water in a piping system... [Continue Reading](https://resources.hy-techroof.com/blog/what-is-the-weight-of-water) [![What To Consider Before Shopping For A Roof Drain](https://resources.hy-techroof.com/hubfs/2022%20Hy-Tech%20Website/Background%20Graphics/Background%20Graphic_Drains_1000.png)](https://resources.hy-techroof.com/blog/what-to-consider-before-shopping-for-a-roof-drain) Aug 15, 2022 ###### [What To Consider Before Shopping For A Roof Drain](https://resources.hy-techroof.com/blog/what-to-consider-before-shopping-for-a-roof-drain) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Unfortunately, there is no one-size fits all tip sheet for selecting a commercial roof drain. Every roof is build differently, local weather patterns create unique requirements and ever manufacturer... [Continue Reading](https://resources.hy-techroof.com/blog/what-to-consider-before-shopping-for-a-roof-drain) [![Where Can I Buy A Flat Roof Drain?](https://resources.hy-techroof.com/hubfs/buy-replacement-drain.jpeg)](https://resources.hy-techroof.com/blog/where-can-i-buy-a-flat-roof-drain) Aug 15, 2022 ###### [Where Can I Buy A Flat Roof Drain?](https://resources.hy-techroof.com/blog/where-can-i-buy-a-flat-roof-drain) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Most commercial roof drain manufacturers sell their products through third parties, namely: Sales reps. Distributors (like Hy-TechRoof.com). Sales Reps Sales reps usually cover specific regional... [Continue Reading](https://resources.hy-techroof.com/blog/where-can-i-buy-a-flat-roof-drain) [![Which Is A Better Roof Drain Dome: Cast Iron Or PVC?](https://resources.hy-techroof.com/hubfs/pvc-v-cast-iron.jpeg)](https://resources.hy-techroof.com/blog/which-is-a-better-roof-drain-dome-cast-iron-or-pvc) Aug 15, 2022 ###### [Which Is A Better Roof Drain Dome: Cast Iron Or PVC?](https://resources.hy-techroof.com/blog/which-is-a-better-roof-drain-dome-cast-iron-or-pvc) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Even though they just sit there, roof drains take a surprising amount of abuse. They are completely exposed to extreme heat in the summer and cold in the winter. In addition, they are low enough to... [Continue Reading](https://resources.hy-techroof.com/blog/which-is-a-better-roof-drain-dome-cast-iron-or-pvc) [![How To Measure Scupper Drain Rings](https://resources.hy-techroof.com/hubfs/zurn-z-189.jpeg)](https://resources.hy-techroof.com/blog/how-to-measure-scupper-drain-rings) Aug 15, 2022 ###### [How To Measure Scupper Drain Rings](https://resources.hy-techroof.com/blog/how-to-measure-scupper-drain-rings) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) What are Scupper Drains? Scupper Drains funnel roof water directly out of a parapet wall via a downspout nozzle or the piping in between. The water flows into an external drain leader on the exterior... [Continue Reading](https://resources.hy-techroof.com/blog/how-to-measure-scupper-drain-rings) [![How To Measure For Flat Roof Drain Replacement Parts](https://resources.hy-techroof.com/hubfs/measure-a-roof-drain.jpeg)](https://resources.hy-techroof.com/blog/how-to-measure-for-flat-roof-drain-replacement-parts) Aug 15, 2022 ###### [How To Measure For Flat Roof Drain Replacement Parts](https://resources.hy-techroof.com/blog/how-to-measure-for-flat-roof-drain-replacement-parts) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Over the life of your roof, your drains will be subjected to a lot of abuse—rain, sleet, snow, construction, excessive heat and cold, debris, etc. This can wear down, or even break your drain,... [Continue Reading](https://resources.hy-techroof.com/blog/how-to-measure-for-flat-roof-drain-replacement-parts) [![How To Install A Marathon Aluminator Retrofit Drain](https://resources.hy-techroof.com/hubfs/marthon-aluminator.png)](https://resources.hy-techroof.com/blog/how-to-install-a-marathon-aluminator-retrofit-drain) Aug 15, 2022 ###### [How To Install A Marathon Aluminator Retrofit Drain](https://resources.hy-techroof.com/blog/how-to-install-a-marathon-aluminator-retrofit-drain) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) The Marathon Aluminator Retrofit drain is engineered to replace most types of broken roof drains while maintaining a strong, watertight seal. Its innovative design allows the retrofit drain to be... [Continue Reading](https://resources.hy-techroof.com/blog/how-to-install-a-marathon-aluminator-retrofit-drain) [![How To Avoid Clogged Flat Roof Drains](https://resources.hy-techroof.com/hubfs/roof-drain-inspection.jpeg)](https://resources.hy-techroof.com/blog/how-to-avoid-clogged-flat-roof-drains) Aug 15, 2022 ###### [How To Avoid Clogged Flat Roof Drains](https://resources.hy-techroof.com/blog/how-to-avoid-clogged-flat-roof-drains) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Large commercial and residential flat roofs, especially those with parapet walls, are catchalls for any and all sort of debris, including leaves, twigs, plastic bags, etc. These roofs typically have... [Continue Reading](https://resources.hy-techroof.com/blog/how-to-avoid-clogged-flat-roof-drains) [![How Much Water Can Flow Through A Pipe (GPM/GPH)?](https://resources.hy-techroof.com/hubfs/social-suggested-images/Water_Impact_0-3.jpg)](https://resources.hy-techroof.com/blog/how-much-water-can-flow-through-a-pipe) Aug 15, 2022 ###### [How Much Water Can Flow Through A Pipe (GPM/GPH)?](https://resources.hy-techroof.com/blog/how-much-water-can-flow-through-a-pipe) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains), [Water Flow](https://resources.hy-techroof.com/blog/topic/water-flow) We regularly get asked about the water flow capacity of different pipe sizes, and which is the best roof drain for a specific pipe size. Unfortunately, recommendations aren't that straightforward... [Continue Reading](https://resources.hy-techroof.com/blog/how-much-water-can-flow-through-a-pipe) [![How Do I Fix A Cracked Roof Drain?](https://resources.hy-techroof.com/hubfs/cracked-drain-blog-photo.jpeg)](https://resources.hy-techroof.com/blog/how-do-i-fix-a-cracked-roof-drain) Aug 15, 2022 ###### [How Do I Fix A Cracked Roof Drain?](https://resources.hy-techroof.com/blog/how-do-i-fix-a-cracked-roof-drain) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) If you’ve noticed water dripping or spots on the ceiling, you may have a cracked roof drain. Even small hairline cracks can lead to water issues. The following steps will help you determine where the... [Continue Reading](https://resources.hy-techroof.com/blog/how-do-i-fix-a-cracked-roof-drain) [![How And When To Inspect A Flat Roof Drain](https://resources.hy-techroof.com/hubfs/roof-drain-inspection.jpeg)](https://resources.hy-techroof.com/blog/how-and-when-to-inspect-a-flat-roof-drain) Aug 15, 2022 ###### [How And When To Inspect A Flat Roof Drain](https://resources.hy-techroof.com/blog/how-and-when-to-inspect-a-flat-roof-drain) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) On large, flat roofs, mainly on commercial buildings or large residential complexes, you’ll likely find internal drainage systems. Unlike scupper or gutter drainage systems, in which water flows off... [Continue Reading](https://resources.hy-techroof.com/blog/how-and-when-to-inspect-a-flat-roof-drain) [![Glossary Of Common Roof Drain And Parts Terms](https://resources.hy-techroof.com/hubfs/roof%20drain.jpeg)](https://resources.hy-techroof.com/blog/glossary-of-common-roof-drain-and-parts-terms) Aug 15, 2022 ###### [Glossary Of Common Roof Drain And Parts Terms](https://resources.hy-techroof.com/blog/glossary-of-common-roof-drain-and-parts-terms) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) When shopping for an industrial or commercial roof drain or replacement part, it is important to be clear with a manufacturer or distributor what you need. Otherwise, you may inadvertently end up... [Continue Reading](https://resources.hy-techroof.com/blog/glossary-of-common-roof-drain-and-parts-terms) [![5 Steps To Calculate Total Roof Drains Needed](https://resources.hy-techroof.com/hubfs/HTP_Resources-Steel-Head-Roof-Drains_600x400.jpg)](https://resources.hy-techroof.com/blog/5-steps-to-calculate-total-roof-drains-needed) Aug 15, 2022 ###### [5 Steps To Calculate Total Roof Drains Needed](https://resources.hy-techroof.com/blog/5-steps-to-calculate-total-roof-drains-needed) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Step by Step Instructions There are 5 easy steps to figure out how many drains your commercial roofing project will need. Step 1: Calculate total roof area Calculate the total roof area by... [Continue Reading](https://resources.hy-techroof.com/blog/5-steps-to-calculate-total-roof-drains-needed) [![Where to Find Replacement Roof Drain Parts When Disaster Strikes](https://resources.hy-techroof.com/hubfs/DSCN1690.jpg)](https://resources.hy-techroof.com/blog/where-to-find-replacement-roof-drain-parts-when-disaster-strikes) Sep 14, 2017 ###### [Where to Find Replacement Roof Drain Parts When Disaster Strikes](https://resources.hy-techroof.com/blog/where-to-find-replacement-roof-drain-parts-when-disaster-strikes) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains), [Roof Repairs](https://resources.hy-techroof.com/blog/topic/roof-repairs) Whenever a natural disaster occurs, uncertainty tends to come with it. As businesses and building owners assess the damage caused by Hurricane Harvey and Hurricane Irma, we’re getting a lot of... [Continue Reading](https://resources.hy-techroof.com/blog/where-to-find-replacement-roof-drain-parts-when-disaster-strikes) [![How to Purchase a Replacement Cast-Iron Roof Drain](https://resources.hy-techroof.com/hs-fs/file-13076825-jpg/images/roof_drains.jpg)](https://resources.hy-techroof.com/blog/bid/57849/how-to-purchase-a-replacement-cast-iron-roof-drain) Jul 28, 2017 ###### [How to Purchase a Replacement Cast-Iron Roof Drain](https://resources.hy-techroof.com/blog/bid/57849/how-to-purchase-a-replacement-cast-iron-roof-drain) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) Commercial cast-iron roof drains are often subjected to heavy weathering and regular wear and tear. As a result, their parts—including domes, rings, sump pans, and clamps—sometimes break, crack or... [Continue Reading](https://resources.hy-techroof.com/blog/bid/57849/how-to-purchase-a-replacement-cast-iron-roof-drain) [![Glossary of Common Commercial Roof Drain and Parts Terms](https://resources.hy-techroof.com/hs-fs/file-13076756-jpeg/images/htd-0100_1.jpeg)](https://resources.hy-techroof.com/blog/bid/57047/glossary-of-common-commercial-roof-drain-and-parts-terms) Jul 26, 2017 ###### [Glossary of Common Commercial Roof Drain and Parts Terms](https://resources.hy-techroof.com/blog/bid/57047/glossary-of-common-commercial-roof-drain-and-parts-terms) ** [Roof Drains](https://resources.hy-techroof.com/blog/topic/roof-drains) When shopping for an industrial or commercial roof drain or replacement part, it is important to be clear with a manufacturer or distributor what you need. Otherwise, you may inadvertently end up... [Continue Reading](https://resources.hy-techroof.com/blog/bid/57047/glossary-of-common-commercial-roof-drain-and-parts-terms) ## How Much Water Can Flow Through A Pipe (GPM/GPH)? Interested in learning about the water flow capacity of different pipe sizes, and which is the best roof drain for a specific pipe size? **Get your answers here.** [Continue Reading](https://resources.hy-techroof.com/blog/how-much-water-can-flow-through-a-pipe) ![Resources_Water Flow Through a Pipe](https://resources.hy-techroof.com/hubfs/2022%20Hy-Tech%20Website/Resources%20Pages/Resources%20Outer/Resources_Water%20Flow%20Through%20a%20Pipe.jpg) ## Find More Resources Browse our expansive resource library for expert knowledge on roof drain specs, parts, accessories, and more. 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