Browse Forums General Discussion 1 Apr 12, 2020 2:06 pm Hi I have a partially buried charged stormwater system at my place that is supposed to fill a rainwater tank. The buried section has a number of cracks/breaks, so the tank doesn’t fill. It also runs through an area that I would like to put a few trees into. The whole system is in 90mm PVC, which seems to be unsuitable for buried plumbing. There are three downpipes running into the system, but not a huge amount of roof area feeding them, about 50m2. I am going to relocate most of the buried part of the system, and replace with 100mm PVC, which is thicker and more durable. However, there is one section where there is a large concrete slab that I will not be able to remove. My plan is to run 100mm PVC up to the slab, then connect to some 80mm PVC (also more solid than 90mm) that runs through the existing 90mm line under the slab, and then reconnect to 100mm on the other side. I am worried that the narrowing of the diameter might restrict the flow of water through the pipe so much that the downpipes back up and the gutters overflow. Any thoughts about whether this is a risk? Thanks very much! Re: Charged stormwater system - diameter restriction 2Apr 12, 2020 2:34 pm No risk. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Flamingo Give me a call and I will do my best to talk you through it. For those who would like an answer, Subject to seeing your actual DA condition, I think you are… 1 4572 Once you know the basics, the rest is easy. Read my post in the thread linked below. viewtopic.php?p=1919271#p1919271 2 19515 Plumbers 'can be' plumbers, made all the worse by self certification which the building surveyor invariably accepts as proof of compliance! The good thing is that you know know. 3 4857 |