Browse Forums General Discussion 1 Apr 03, 2019 5:18 am I have an unidentified pipe adjacent to the wall of my house by about 40cms. It then turns and goes under the slab about. We have had problems with water ingress under the subfloor of the house and are told that the civil engineers advised the builder to "cap " the pipe and we are told it has been done. However this work was not undertaken by a plumber but by a landscaper who filled around the pipe and the trench with concrete as he said it would stop the movement of the pipe and hopefully stop the water ingress. My builder is saying this is the same thing as capping can anyone e Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ nlighten me please. The pipe is only about 20cms below the surface of the soil. Re: storm drain 2Apr 03, 2019 10:29 am The water ingress will be via the trench which will be draining the surrounding soil. I am wondering why civil engineers advised to "cap the pipe" and where was it capped? Did the pipe discharge under the sub floor? Surely not! Where does the pipe originate and what was the pipe's purpose? 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: storm drain 3Apr 03, 2019 10:45 am Believe it or not the builder told me he didn’t know where the pipe was coming from or what was in it but the landscapers say they believe it is a storm drain It could possibly be dishcharging under the slab as it is awash the other side of this slab after it rains. It is only about 2 meters wide at this point. A representative from the developer was told by the civils as he quoted to cap it. Are they the same thing ? It doesn’t seem so. One is stopping the contents inside the pipe the other is stopping the water from around the pipe going through. ??????? Re: storm drain 4Apr 03, 2019 12:43 pm I just need to be clear on something...you have posted both "slab" and "sub floor". Do you have a combination of the two because you are on a steep slope? Are you on a steep slope? You have also posted "The pipe is only about 20cms below the surface of the soil" but the photo shows it is probably 2cm or has it been raised? It will be a stormwater pipe and I can only assume that it is draining an ag pipe from higher up the slope (I am assuming that there is a slope). I cannot see a plumber laying that pipe, it had to be an amateur. For a start, there has to be a minimum 100mm cover over the pipe when in a non vehicular area. Any competent civil engineer should also know about trenching and the required angle of repose which is 45 degrees in accordance with the National Construction Code (NCC) Part 2 Clause 3.1.2.2(d) and the referenced Australian Standards found in AS/NZS 3500 Part 3. The diagram below if from the NCC Part 2 and the 3 Part NCC can be downloaded free of charge. Like ⋅ Add a comment ⋅ Pin to Ideaboard ⋅ You really need to find out urgently where the pipe originates. If it is from downpipes (which beggars belief), the urgency is obvious. If it drains an ag pipe, then water will be building up at the source and that will require urgent attention. Do you have a retaining wall? You also need to find out who installed the pipe. Is it a new home? I am assuming that it is. Was the pipe there when you moved in (being covered, you may not have known about it) or have you had drainage work done since handover? The trench needs to be clay (or similar) plugged because it is also serving as a conduit. Also, do you know your soil classification? Sorry for so many Qs. 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: storm drain 5Apr 03, 2019 1:16 pm Firstly thanks for your time you have been more than helpful. Yes we are are part slabpart elevated floor the slab is Ll shape with a short side extends further down the slope The property is four years old and has many other defects but this water issue is a worry. The water comes from under the slab see then pools at the top footings onthe batter before running down the center of the sub floor where it pools again . the sub floor is not a habitable area but we have had issues as well with mold and fungus so it needs to be sorted As far I know the pipe would always have been there. Our soil classification is listed as h2 but there is some dispute as the council does not appear to have the copy as listed on the approval plans. It is likely that the H2 comes from a previous soil test in the area before a great deal of soil was moved out by the developer We live on an over 50 complex and lots of the properties have problems with water but the builders and the developers have put themselves in liquidation so the problems are not getting solved properly. I had a QBCC inspection and the officer didn’t even go to look at the pipe outside just took the builders word that it was capped. I’m pretty sure it isn’t capped The picture was taken when the concreting was done so it’s difficukt to tell how far under the ground it is as they have now buried it under stones probably over the 100 mm Thank you once again Re: storm drain 6Apr 03, 2019 1:51 pm I'm sorry to hear all that. You have my best wishes. Bill Shorten has promised to crack down on company phoenixing if elected. I wish that he would promise a Royal Commission into the building industry with terms of reference being how the industry is regulated and new home buyer lack of protection. Having a plumber break the pipe at an accessible area a day or so after rain and putting a camera down should answer some important questions. See if you can find a good plumber with a cam and speak to him about the issue first. I am not in QLD and can't recommend anyone. The water source should have been identified, the pipe removed and the trench compacted and plugged. Having H2 soil is a real worry if you have saturated areas. 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: storm drain 8Apr 03, 2019 2:01 pm jacpat It is likely that the H2 comes from a previous soil test in the area before a great deal of soil was moved out by the developer We live on an over 50 complex and lots of the properties have problems with water but the builders and the developers have put themselves in liquidation so the problems are not getting solved properly. I really, really, really hope that the developer hasn't created a shallow underground lake sitting on a clay base. It really sounds like the owners in the complex should get together to contribute to the cost of a geotechnical investigation. Are the most affected properties 'clumped' in one area or are they widespread? 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: storm drain 11Apr 04, 2019 9:02 pm I see 3 pipes but I have assumed that the small black one furthest from the wall has never been buried. 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: storm drain 13Apr 05, 2019 8:30 am That is what I have understood. Re the Termicide reticulation pipe, AS 3500.3.7.2.7 Proximity to other services (j) states: The separation between any underground stormwater drain and any other service other than consumer gas piping and electrical or communication service shall be at least- (i) 100mm from a drain not exceeding DN 100 and is serving the same property I would say (but not 100% sure) that the Termicide reticulation pipe comes under the definition of it being a service. Regardless, the stormwater pipe has not been buried to the required regulatory depth and so there wasn't much choice with the Termicide pipe. The separation distances between a gas and stormwater pipe are very strict. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. Hello I am developing 2 side by side units. Wish someone can help me on the following questions 1) Which stage should be the storm water pipe installed during the new… 0 7815 If you need to be able to access these then you may need to dig them out and cut them so you can add a socket and a riser to the required height. We normally add a… 1 6845 Thanks for that, the PVC pipe is still about 40cm below ground level and it sticks out of the sand with no end cap or anything on it just open pipe, is this the finished… 2 10473 |