Browse Forums DIY, Home Maintenance & Repair 1 Jan 09, 2020 10:42 am I was trying to mount clothline poles onto my existing concrete slab in my courtyard. And I need to drill some 10mm hole There was a drainage on the ground in the center of where I want to mount, but I saw it is way more than 200mm deep before connecting to the underground pipe, and I only need holes of 8mm deep so I thought I was safe. (In fact safer as I can accurately guess where this pipe goes) What I missed is it is close and in line to a gutter rain water collection pipe which goes underground. So when I busted it about 7cm deep, and low pressure water came out of it for 30 - 45 minutes. Both my and neighbour's water main is not affected From its location it is likely a charged line from the roof gutter to the water tank, therefore there was pressure pusing it back out due to some water stored in the vertical pipe. So... what do I do now? I would like to have it fix so not render my whole rain water collecting system useless because there is a hole there. I also worry about the water leakage would damge the foundation in long run. So if possible, have it fix properly. What would a plummber do in this case? First time posting and thank you for your advices in advance. Re: I drilled through a PVC pipe under concrete slab..what n 2Jan 09, 2020 1:36 pm playgamemy I only need holes of 8mm deep so I thought I was safe. (In fact safer as I can accurately guess where this pipe goes) What I missed is it is close and in line to a gutter rain water collection pipe which goes underground. So when I busted it about 7cm deep, and low pressure water came out of it for 30 - 45 minutes. As per AS/NZS 3500.3, Table 7.1 states that the minimum pipe cover required under pavement of brick or unreinforced concrete in an area not subject to vehicular loading is 50 mm. playgamemy From its location it is likely a charged line from the roof gutter to the water tank, therefore there was pressure pusing it back out due to some water stored in the vertical pipe. It certainly appears so. playgamemy So... what do I do now? I would like to have it fix so not render my whole rain water collecting system useless because there is a hole there. I also worry about the water leakage would damge the foundation in long run. Unfortunately, you have a standard wet system and if you are on Bay of Biscay, you don't need this sort of issue plus the pipe might connect to more than one downpipe. A plumber would cut and lift a section of the concrete and repair the pipe. Once accessible, repairing the hole in the pipe is easy, it is harder restoring the concrete. I doubt that a plumber would repair the concrete (but ask beforehand) and unless you can do that yourself, you would also need a concretor or a handyman but that would cost quite a lot all up. I would use just the one tradie and try to get a concretor who was also prepared to do the very simple pipe fix but get a quote or else ask about the hourly charge first. 3in1 Supadiverta. Rainwater Harvesting Best Practice using syphonic drainage. Cleaner Neater Smarter Cheaper Supa Gutter Pumper. A low cost syphonic eaves gutter overflow solution. yep sounds good make the footing bigger to to allow for the pipe in the middle 3 5284 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 3239 Water this close to the slab edge or under the slab can cause slab heave or subsidence and is potentially a serious problem especially on highly reactive clay soils. Over… 6 2991 |