Your browser does not currently recognize any of the video formats available. Click here to visit our frequently. Correct pipe sizes will ensure adequate flow rates at appliances and avoid problems increased heat losses from hot water distributing pipes. How do you guys pipe it. Do you return in to the bottom of the heater? Hot Rod is % right. In addition to the internal and external cold water services pipework you will also be required to size the pipework for hot water services in your work. Designing a domestic hot water recirculation system is not typically difficult. To determine this value we consult a piping heat loss chart Table 1. This inspector is hiding behind the "Administrative Authority" clause in the UPC, which pretty much gives him authority over how the system will be designed if the code does not address it. But, most of the time, I never get to any limiting velocity. Review the labelled hot water pipework layout for the motel. Optimizing Design for Functional 3D Printed Assemblies When it comes to designing assemblies, tolerance and fit are key. However I am a bit confused by your statement "I have never sized a circulating pump based on velocity, mainly because they never approach the upper limit". If it's not in your local code addendums and not in the code book, he gets no say in what you do other than to make suggestions! To determine this value we consult a piping heat loss chart Table 1. Well there is the risk of replacing an over-sized pump with an undersized one. Who makes a pump that would be quiet? Only the pipe size is indicated. Hot Water Circulation Pipe Sizing cdxx Mechanical 5 Feb 14 Well, heck yeah; gravity is the best, but more often than not gravity won't work if the return line is anything but vertical. The total heat loss from the whole pipe line can be calculated as. Hot Water Circulation Pipe Sizing PEDARRIN2 Mechanical 5 Feb 14 September in THE MAIN WALL. Archives Please click the links below to view indexes of posts grouped by date and title, categories, and tags: Back to links Step 7a — Sizing pipework The final stage in the process is to determine the nominal pipe size for the hot water service system.