Browse Forums Eco Living 1 Nov 18, 2013 9:04 am The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 2Nov 18, 2013 11:45 am http://camdenbuild.blogspot.com.au/ by invite only please pm me Re: Rainwater tank bedding 3Nov 18, 2013 5:19 pm The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 4Nov 18, 2013 5:50 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: Rainwater tank bedding 6Nov 19, 2013 12:37 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: Rainwater tank bedding 7Nov 19, 2013 2:56 pm The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 8Nov 19, 2013 5:11 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: Rainwater tank bedding 9Nov 20, 2013 9:28 am The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 10Nov 25, 2013 6:47 am The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 11Nov 26, 2013 10:41 am The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 13Nov 26, 2013 5:42 pm Thanks B-Star. I think I will do just that. I am getting other concreting work done so will look at adding this as well. I am also seriously considering bumping up our "to do" list two larger rainwater tanks (2x 10,000 ltrs). So this will be a project for 2014. I kick myself over this one for not been across it as much as the house and for not been as vigilant when the house plan was drafted to ensure it was on the plan. The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 14Nov 26, 2013 8:14 pm Resiting the tank on a slab involves a lot more than just making a slab, there are also disconnections and re-connections and you will not have the same levels. 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: Rainwater tank bedding 15Dec 02, 2013 2:23 pm Builder is going to redo tank bedding. Going with draining and removing the tank, digging out soil (depth of 100mm) boxing it and back filling with sand/gravel cement mix. Replacing the tank and all connections. If I had time I would have a concretor out there now, but these things take time.... On a side note, the down pipes are 900 and the underground system is 1000 and all other pipes are infeed and outfeed are 1000. I have made two changes to the overflow, something to do with the a collar and one of the pipes. I meant to take pictures today... But forgot. The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 16Dec 02, 2013 2:53 pm kiakhan the down pipes are 900 and the underground system is 1000 and all other pipes are infeed and outfeed are 1000. They will be 90 mm & 100 mm. You need to read my posts again. You are either missing a lot or you have chosen to ignore professional advice. 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: Rainwater tank bedding 17Dec 02, 2013 6:05 pm Yes you are correct 90 mm & 100 mm. SaveH2O or you have chosen to ignore professional advice. Wow that's a leap. I have read your post and will reread it after I've finished meeting builders, plumbers, carpet layers, pest control, window tinting, blinds, concreter, fencers and the list goes on.... Honestly Saveh20 math was never my strong point. Also the water on this roof can only flow one way. High point is 5100 to 3200 with a concave roof. I paid professionals to do this right and like most people have put my trust in them doing the right thing. I'm hardly going to ignore the advise of professional with one of the biggest financial investments of my life. Cheers The build - https://forum.homeone.com.au/viewtopic.php?f=31&t=67554 The Yard - viewtopic.php?f=19&t=67695 Re: Rainwater tank bedding 18Dec 06, 2013 12:11 pm kiakhan I paid professionals to do this right and like most people have put my trust in them doing the right thing. I'm hardly going to ignore the advise of professional with one of the biggest financial investments of my life. Hi kiakhan, It is your choice as to whether you follow the 'professional' advice of those that you have put your trust in (and who have let you down) or whether you research the advice given to you by others to verify its authenticity to ensure that the work done is compliant and/or is of a high standard. When I give advice on these forums, it is in the knowledge that many others read the threads and there is every chance that more than one person will benefit from my time and effort. I have the strong feeling that you are not following up on all of the advice that I have given and simply concentrating on aesthetics. This is frustrating as it not only wastes my time, it could/will inadvertently disadvantage others. Amongst other issues that I have alerted you to, I have gone to lengths to explain the amount of water that will be draining off the 150 sq m roof harvest area supplying the tank during a (near to) Brisbane area's 1:20 ARI. Your 150 sq m roof area drained is also subjected to a multiplier that factors wind driven rain. If your roof slope is let's say 23 degrees, the multiplier is 1.21. In other words, the roof area would be factored as 150 sq m x 1.21 = 181.5 sq m. If your area's 1:20 ARI is 240 mm hr (based on a 5 minute average rainfall intensity of 4 mm/min), the roof area would be factored to drain 181.5 (sq m) x 4 (mm/min) = 726 litres per minute during wind driven rain for roof drainage compliance that determines the required gutter cross sectional area and the number and size of the downpipes. Stormwater retention system regulations are poor at best and the BCC has in the past shown a woeful lack of understanding of hydraulics as per their failure to recognise water tank overflow pipe hydraulic capacity limitations. Regardless of this, a good ('professional') plumber will design all facets of a rainwater retention system so that it is compliant with the National Plumbing and Drainage Code and is not sub standard. Unfortunately, this is not always done and a casual stroll through the many threads and blogs on this site will show numerous examples of sub standard and excessively priced installs that are nevertheless often still compliant. It was stated in an earlier post that the 150 sq m roof area drains through four 90 mm downpipes to a 100 mm pipe. I previously referred to AS2200 on November 26th. I deleted this on December 4th after the post was not acknowledged. AS2200 is the standard that mandates the maximum flow rate through drain pipes laid with a 1:100 fall. For the benefit of all, I offer the following... AS/NZS 3500.3:2003 SECTION 5 - Surface Drainage Systems Design references AS2200 and Figure 5.1 shows that the maximum flow rate for a DN 100 mm pipe laid at 1:100 is 460 litres per minute. Regardless of any deficiencies in other regulations, your 150 sq m roof area would be factored by regulation to drain 726 litres per minute during a 240 mm/hr 1:20 ARI and hydraulic calculations need to ensure that the correct pipe size is used for compliance. The link below is from the QLD Government: Department Of Local Government And Planning that also addresses the above issue. The example used is for a 150 sq m roof in Brisbane. Note that the Brisbane 1:20 ARI is 250 mm/hr. Also note the calculation for the gutter size and the size and number of downpipes required for compliance. http://www.dsdip.qld.gov.au/resources/n ... er/136.pdf EDIT: The 125 mm x 85 mm rectangular gutter size used as the example in the QLD Government document linked above is stated to have a cross sectional area of approximately 8,000 sq mm. 125 x 85 = 10,625. The reason that the gutter's cross sectional area is the lesser figure (approximately 8,000 sq mm) is because the measure is taken from 10 mm below the lowest wall (which is usually the back wall) or 10 mm below the gutter overflow slots if optioned. 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: Rainwater tank bedding 19Jan 02, 2014 11:15 am A couple of years back on our old house, we added a 10 000 litre poly water tank, and the instructions for the base was that if you didn't have a concrete base, you could use crusher dust mixed with cement power. That tank water put in place on the crusher dust about 20cm above existing ground level, and whilst small bits of the crusher dust got washed away in the next dumping rain, the rest of it is as it was when I installed it. FWIW, it was attached to a 2 car garage (7 x 6m) and glad I didn't get a smaller tank. Also the downpipes go straight to the tank in the air, and not down underground then back up again. I might add that this is in the Logan City area of Queensland. Owner Building at Jimboomba Woods in Logan City Qld. Blog : http://bandlnewhomebuild.blogspot.com H1 thread : viewtopic.php?f=38&t=68283 . Hi All! I have engaged a plumber to re-do the stormwater drainage system on my property which is mid-70s and had blocked/cracked clay pipe drains. The works has… 0 18714 DIY, Home Maintenance & Repair But if it is a ground level open pit, then it is not a charged system. No surprises there. The pipes have obviously been altered and there would be a reason for this.… 3 31389 Grate, thank you! RexChan if thats the reason i could sleep well without thinking about additional cost. But 1st i'll need to read about NRV cleaning/replaing stuff. I… 7 31225 |