Browse Forums Landscape & Garden Design 1 Apr 01, 2021 10:48 am Hi Guys, I apologise if this topic has been covered already. Background: The side of my house has water pooling and one guy has quoted to add agi pipes connected to two pits along the boundary of the property and then water from agi pipe will be let loose in the frontyard lawn as a end point. The house is sitting on clay (reactive soil) and already foundation had to be under pinned in two locations. Question: 1. Is it beneficial to have pits? 2. Should the AGI pipe be connected to Stormwater drains? The guy who quoted said that it is dumb to connect agi pipe to stormwater as agi pipe will also collect dirt or things that could block up the drain pipe. 3. I bought this property in Prestons, NSW back in october and there is no house plan that depicts storm water drains. Even checked dial before you dig and it didn't show how the pipes were connected to the house, it only provided details of pipes running around the area. Please help me out so that I can get this done correctly the first time. On a another project, we spent 11k on concreting the backyard in october, but the D*ck sloped the concrete towards the house and close to wip holes, also he added a small drain pipe which gets airlocked each time there is heavy rain and water pools big. To fix this we have been quoted 6.4K. We don't want to do the same mistake again and want to get it right first time. Thanks in Advance, Vin Re: Should Agi pipe be connected to Stormwater or frontyard 2Apr 01, 2021 11:33 am Ag pipes have to be connected to silt pits. That is a regulation. The pit's drain pipe is then usually connected to the stormwater by a licensed plumber but it can drain elsewhere provided it is contained on the property. Obviously the point of discharge has to be lower than the pit's drain pipe exit height. When on reactive soil, the discharge/collection point needs to be well away from the house. Google "Matric Suction" for further information. 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: Should Agi pipe be connected to Stormwater or frontyard 3Apr 01, 2021 11:41 am vinodn On a another project, we spent 11k on concreting the backyard in october, but the D*ck sloped the concrete towards the house and close to wip holes, also he added a small drain pipe which gets airlocked each time there is heavy rain and water pools big. To fix this we have been quoted 6.4K. We don't want to do the same mistake again and want to get it right first time. The cowboy has done work that is massively non compliant and you should take steps to get your money back and additional monetary compensation for removing the defective work. The NCC requires a 1:20 slope (50mm) over the first metre away from the house and minimum weep hole heights above an impervious surface are also found in the NCC. The 3 Part NCC can be downloaded free of charge, you need Part 2. Do concreters have to be licensed in NSW? You should talk to the Department of Fair Trading as a first step. 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: Should Agi pipe be connected to Stormwater or frontyard 5Apr 30, 2022 7:46 pm re: connect and agi pipe directly to the stormwater Hi, l was wondering if someone could help with the issue we have. our front yard is pretty much clay. We landscaped it ourselves 2 years ago with trees and a stone yard. We planted 3 feature trees in the center but 1 died and 2 we repotted to save em because of the water build up in the clay. The issue is the water doesn't drain quickly enough during heavy rains. We did treat the top surface with gypsum when we did the landscaping 2 years ago but the but clay hasn't broken up. So this easter we dug a larger hole, with a trench at the front and a slight slope towards the trench. l placed an agi pipe thats in a U shape, at the base of the trench facing up. My idea was to use this to pump out any excess water once in a while in winter and water the trees in summer. But we severely underestimated how much water would accumulate in a single day. It took 2 mins per pet to drain with a pump after 1 nights constant rain. We spoke someone at a nursery who suggested that the we should have laid the agi pipe horizontally and straight into the storm water pipe so the water gets flushed out right away without accumulating which makes sense. That's what we were planning on doing and upon research l came across this post. So do we need a silt trap for the purpose of keep our 3 trees well drained when it rains? What would happen if we didn't have a silt trap? both short and long term. your advice would be greatly apricated. Nirose Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ Re: Should Agi pipe be connected to Stormwater or frontyard 6Aug 24, 2023 8:39 am Tree roots are mainly on surface so you need approx 300 mm of good soil around the tree for it to get established. To reduce water logging in that area you need to lay agg pipe on the perimeter of such area, ensuring its level is below 300 mm or whatever you managed to dig. What you did is created a pool. Unless you have an automated system to drain excess of water you need to establish at least a passive drain, say towards an onto the walkway or any other lower surface. The passive drain would be a 300x300 trench filled progressively with 20,10, 5 mm blue steel or reagg, and potentially wrapped in geofabric. One side of it is connected to your pit (which might need to be raised to ensure an appropriate fall) and the other is to walkway or any lower surface. I did this on a hilly area with surprise-surprise hydrophobic soil - worked well. Before i did it a few trees died due to waterlogging. Another option would be to mix clay with soil on a 3x3m area at a depth of 100 mm (should be easy) and create a box / raised garden bed sort of thing for the tree. It'll allow the tree to get established, but the raised bed, when it rots away will become a hill. I would not make such bed greater than 200mm above the ground though. It's only my opinion. 3 6946 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 5623 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 20341 |