Browse Forums DIY, Home Maintenance & Repair Re: Fixing gutter capacity issue around patio 2Feb 05, 2024 4:38 pm 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Fixing gutter capacity issue around patio 4Feb 06, 2024 8:07 am 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Fixing gutter capacity issue around patio 6Feb 07, 2024 8:52 am 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Fixing gutter capacity issue around patio 9Feb 12, 2024 6:20 am Unfortunately, you are correct. Paradoxically, a lot of emergency overflow solutions discharge to atmosphere whereas the Gutter Pumper diverts water. WA gutters are sometimes fitted with small side spouts colloquially called 'pissers' but they also discharge to atmosphere as does the large inverted nozzle described in the Stratco doc. I have assumed that the gutter overflows on both sides of the downpipe but not at the downpipe itself. Am I correct? I am envisaging a possible small custom design that could be made at a sheet metal shop. My initial thought is to have a 10-12mm wide slot 80-100mm long cut into the gutter's exposed flat underside on both sides of the downpipe. A flanged fitting would then be silicone sealed and pop riveted around the slot. The fitting would need to flange out on its sides so it it could be fitted at one end with either a 15mm (18.3mm ID) or 20mm (23.7mm ID) pressure pipe which have ODs of 21.3mm and 26.7mm respectively. The pvc pipe would then be plumbed to the downpipe which would be 3-4 metres away or a couple of metres away if the hanging pipe was unable to be secured. Alternatively, the pipe could be plumbed to a large ornamental urn or similar that was fitted with a low drain outlet. I don't envisage you being able to have a slot much more than 10mm wide due to the fitting needing a flanged perimeter but due to the design being a longitudinal sump, some coarse mesh or a perforated zinc sheet may be needed. This could be easily fitted inside the gutter and separate to the fitting. The flow rates should be quite good because the pipe should full flow once the water level exceeds critical submergence which in this situation would be about x3 the pipe's ID but testing would be needed to verify this. Pushing the pipe 30-50mm or so into the fitting with the bottom half of the pipe inside the fitting (sump) removed will also prevent a free surface vortex forming. Do you know someone who has a 3D printer and can do files? 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Re: Fixing gutter capacity issue around patio 10Feb 12, 2024 10:52 pm Thanks again for your reply. The overflow definitely happens away from the downpipe but whether it happens at the downpipe as well I can't say for sure. The property is tenanted and I only get 2nd hand info with limited detail. I have a 3D printer and have made some files before. I can see what you are saying with the gutter design and it could work well in some cases. In my case there are a couple of issues, one is that the patio downpipe is between a sliding door and a fairly large L shaped window. To access a section of gutter that doesn't have the patio waling plate under it would be quite far from the downpipe on the other side of the window (probably at least 4 lineal metres and 2x 90 degree bends away) so may not necessarily mitigate overflow closer to the downpipe. The other thing is being tenanted I can't really do trial and error and giving a prototype to a contractor to go and install isn't ideal. The rainhead idea sounded pretty good. What about just doing that and maybe upgrading the downpipe and adaptor size and possibly a hole in the downpipe say 200mm off ground level? If that doesn't work I can try some of the other solutions. Re: Fixing gutter capacity issue around patio 11Feb 16, 2024 9:53 am This is a very challenging situation, made much harder by not being on site. Firstly, I think that I originally overestimated the % coverage of the additional roof areas to some gutter sections as the greenery shown in the overhead photo is (I assume) unlikely to overhang the patio. Is this correct? I don't know for sure where the gutter's high and low points are or whether the gutters pool after it stops raining. Pooling would indicate that the gutter's slope was levelled for aesthetics when the patio roof was constructed as is often the case. If there is a slope, the patio area gutter's low point would be either at the valley close to the patio downpipe as per the NCC Part 2 (BCA) regulations or even at the downpipe itself. The two high points would logically be at the ridge to the left of the downpipe adjacent to the patio area and also at the ridge to the left of the patio downpipe. Unfortunately, I can't see how the flow of water down each valley communicates with the water in the gutter but it would be rare for all of the water flowing off the valley to be directed towards the section of gutter flowing towards the downpipe. rsmallri The rainhead idea sounded pretty good. What about just doing that and maybe upgrading the downpipe and adaptor size and possibly a hole in the downpipe say 200mm off ground level? If that doesn't work I can try some of the other solutions. My experience with gutter overflows is that unless the downpipe or subsurface drainage pipe is flow restricted, the overflows happen away from the downpipe. In many cases, fitting a larger downpipe is not the answer. If you have overflows from both sides but away from the downpipe, you will need to attend to both sections of gutter. You need to find out (if possible) whether more than one section of gutter overflows. I also don't know how bad the discharge from the bottom of the downpipe is but there are two scenarios for its cause. 1. The subsurface pipe is flow restricted. 2. It is the result of the water flowing down the downpipe hitting the internal deadplates in the adaptor and the resultant hydraulic jumps resulting in water splashing up the space between the adaptor and the downpipe walls. Aesthetics aside and provided the discharge from the bottom of the downpipe is rectified, you could first plumb, as a trial run with the current guttering, an additional outlet to the gutter, divert the water the short distance to the downpipe and wait to see what happens. You might be lucky. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. No, I even have sections of narrowness where the tiles won't slide up any further. When I manage some spare time, I might play around with the first DIY part of my… 7 5099 Thank you so much. We ended going with the terrain that’s part of our brick. 2 2796 I'll look into different shower heads and ask the plumber about some engineering and see what he says. Thanks 2 9891 |