Roz Posted February 21, 2019 Share Posted February 21, 2019 What is the difference between a distribution chamber and an inspection chamber? To be placed between the septic tank and the soak away. Distribution chambers, when googled, seem to come up very expensive. Link to comment Share on other sites More sharing options...
scottishjohn Posted February 21, 2019 Share Posted February 21, 2019 (edited) I think the main difference is that an inspection chamber is basically a hole to look at the pipe going in and out of the chamber a distribution chamber will have one inlet AND an umber of outlet connections --usually 4 for the soakaway perforated hoses so its fitted where the main grey water pipe meets the soakway field this is my understanding of it Edited February 21, 2019 by scottishjohn Link to comment Share on other sites More sharing options...
ProDave Posted February 21, 2019 Share Posted February 21, 2019 Between the septic tank and soakaway is usually a sample chamber, one pipe enters, thre is usually a small drop and another pipe exits. the idea being SEPA / EA or whoever can drop a container in and take a sample of your effluent Here is the first one I found doing a quick search. https://www.wplinternational.com/optional-extra/wpl-sample-chamber/ Link to comment Share on other sites More sharing options...
scottishjohn Posted February 21, 2019 Share Posted February 21, 2019 the design of your soakway field will determine which you need or if you need both Link to comment Share on other sites More sharing options...
Roz Posted February 21, 2019 Author Share Posted February 21, 2019 This was what I found when looking, which just seemed expensive when compared to the inspection chambers!https://www.drainagesuperstore.co.uk/product/underground-sampling-and-distribution-system-chamber-110mm.html But then found this.. https://www.drainagesuperstore.co.uk/product/polylok-standard-4-hole-distribution-chamber-with-flat-cover.html and i don't understand why the difference in price Link to comment Share on other sites More sharing options...
scottishjohn Posted February 21, 2019 Share Posted February 21, 2019 8 minutes ago, ProDave said: Between the septic tank and soakaway is usually a sample chamber, one pipe enters, thre is usually a small drop and another pipe exits. the idea being SEPA / EA or whoever can drop a container in and take a sample of your effluent Here is the first one I found doing a quick search. https://www.wplinternational.com/optional-extra/wpl-sample-chamber/ how goes the 50mm pipe problem dave Link to comment Share on other sites More sharing options...
ProDave Posted February 21, 2019 Share Posted February 21, 2019 On ours, we just did the "distribution" underground with a few tee connectors, @scottishjohn waiting for the Italian pump to arrive. Link to comment Share on other sites More sharing options...
ProDave Posted February 21, 2019 Share Posted February 21, 2019 24 minutes ago, Roz said: This was what I found when looking, which just seemed expensive when compared to the inspection chambers!https://www.drainagesuperstore.co.uk/product/underground-sampling-and-distribution-system-chamber-110mm.html But then found this.. https://www.drainagesuperstore.co.uk/product/polylok-standard-4-hole-distribution-chamber-with-flat-cover.html and i don't understand why the difference in price It's the difference between a Trabant and a Rolls Royce. They both do the same thing, but the quality, and the price. The cheap one does not look very deep to me, I am not sure it would have worked for us. The treatment plant outlet was 700mm down and then another 100mm ore more step for the sample chamber, you will be looking at about a metre down. 1 Link to comment Share on other sites More sharing options...
Roz Posted February 21, 2019 Author Share Posted February 21, 2019 48 minutes ago, ProDave said: It's the difference between a Trabant and a Rolls Royce. They both do the same thing, but the quality, and the price. The cheap one does not look very deep to me, I am not sure it would have worked for us. The treatment plant outlet was 700mm down and then another 100mm ore more step for the sample chamber, you will be looking at about a metre down. I think ours is about that depth too. I might just ask the builder to sort out the distribution chamber from the merchant! Is non-woven geotextile the right option also by the way? It's more expensive than woven so wanted to check before I committed. Link to comment Share on other sites More sharing options...
bissoejosh Posted August 8, 2019 Share Posted August 8, 2019 I'm now at this stage but I have a 32mm MDPE feed to the sampling chamber as we have a pumped outlet. My thinking is just drill a hole in a normal inspection chamber sidewall to locate the MDPE and provide a easy to access sample point then use normal T connectors to branch the 110mm pipe out across the distribution field. Can anyone see an issue with this? Link to comment Share on other sites More sharing options...
PeterW Posted August 8, 2019 Share Posted August 8, 2019 Use Y or 45 degree connections for your drainage field. And what you suggest is ok but angle the MDPE into the chamber at 45 degrees so it doesn’t spray up the wall when the pump runs. Link to comment Share on other sites More sharing options...
ProDave Posted August 8, 2019 Share Posted August 8, 2019 12 minutes ago, bissoejosh said: I'm now at this stage but I have a 32mm MDPE feed to the sampling chamber as we have a pumped outlet. My thinking is just drill a hole in a normal inspection chamber sidewall to locate the MDPE and provide a easy to access sample point then use normal T connectors to branch the 110mm pipe out across the distribution field. Can anyone see an issue with this? If you have a pumped system, the holding tank with the pump is the sample point, or in our previous pumped system the sample point was in between the septic tank and the pumping chamber. I have never seen a sample point installed in this location with a pumped system. Link to comment Share on other sites More sharing options...
bissoejosh Posted August 8, 2019 Share Posted August 8, 2019 13 minutes ago, ProDave said: If you have a pumped system, the holding tank with the pump is the sample point, or in our previous pumped system the sample point was in between the septic tank and the pumping chamber. I have never seen a sample point installed in this location with a pumped system. That makes sense, I need to take a look in the treatment plant and see . I still need to drop the 32mm into 110mm for the drainage field though and this could double as an inspection point if needed. That is unless a fitting that converts 32mm MDPE to 110mm exists which I doubt. Link to comment Share on other sites More sharing options...
gavztheouch Posted April 6 Share Posted April 6 I am designing my drainage. I have a sewage treatment plant, like this thread states needs an inspection chamber with a small drop to catch a sample of water. Looking at the warrant handbook it needs to be a drop of 150mm. I don't have much height to work with and if the building inspection definitely needs this drop I will possibly have to pump the water higher just for it to fall again over the 150mm drop. This seems a little mental as I'm sure you could find a way of extracting a sample of water easy enough from a straight flowing inspection chamber with no drop. Im going to phone the warrant department on Monday, but I was wondering if anyone has gotten away with not having this 150mm drop after the sewage treatment or septic tank? Link to comment Share on other sites More sharing options...
dpmiller Posted April 7 Share Posted April 7 some TPs have a sampling point built in 1 Link to comment Share on other sites More sharing options...
Kelvin Posted April 7 Share Posted April 7 (edited) Yes, our Graf One2Clean has a built in sampling chamber and the treatment plant wasn’t too dear so simplified the install with no extra cost. Edited April 7 by Kelvin 1 Link to comment Share on other sites More sharing options...
saveasteading Posted April 7 Share Posted April 7 13 hours ago, gavztheouch said: don't have much height to work with That's a good point. This will lower all subsequent drain runs and the soaway or drainage field, increasing cost and risk. We need another solution.....the buildhub detail. I'm guessing that the intention is that an inspector can take a flowing sample as it emerges. Link to comment Share on other sites More sharing options...
joe90 Posted April 7 Share Posted April 7 My ground was very flat and virtually no fall, my Vortex had a built in sampling chamber which saved the day. Link to comment Share on other sites More sharing options...
saveasteading Posted April 7 Share Posted April 7 56 minutes ago, joe90 said: built in sampling chamber Did it have that 150mm drop in it though? They seem to want that and it is still a 150mm loss of height. Link to comment Share on other sites More sharing options...
dpmiller Posted April 7 Share Posted April 7 in our case the Solido airlifts well above the outlet, into the sampling pot, and this then overflows to the outlet Link to comment Share on other sites More sharing options...
saveasteading Posted April 7 Share Posted April 7 1 hour ago, dpmiller said: the Solido airlifts well above the outlet, into the sampling pot, and this then overflows to the outlet Interesting. I will have to read the bumph again because I am not understanding how it works, or why they have not used 3 chambers. It seems to be a single chamber, ie more like a cess tank than a digester, but with air bubbles. Then the outlet is by a pump, not gravity, the 'airlift' of the title. There is only a 20mm drop in level from in to out. The sampling pot does not have the 150mm suggested but is effectively pumping a sample out. But if it works... Link to comment Share on other sites More sharing options...
joe90 Posted April 7 Share Posted April 7 2 hours ago, saveasteading said: Did it have that 150mm drop in it though? They seem to want that and it is still a 150mm loss of height. Ah, not sure if it was 150mm, can’t remember and the diagrams don’t show the drop. 🤷♂️ but it worked. Link to comment Share on other sites More sharing options...
dpmiller Posted April 7 Share Posted April 7 33 minutes ago, saveasteading said: It seems to be a single chamber Correct. It's an SBR- Sequencing Batch Reactor. It goes through a run of aeration and settling cycles before a final settle and pump out. 1 Link to comment Share on other sites More sharing options...
saveasteading Posted April 7 Share Posted April 7 15 minutes ago, joe90 said: but it worked. If the bco accepts it and it works, then that may conclude the process. It will probably never be tested by the authorities. I will try reading the instruction manual again, to see if I can work out how it works, and if it is a real or imagined advantage. 1 Link to comment Share on other sites More sharing options...
saveasteading Posted April 7 Share Posted April 7 2 minutes ago, dpmiller said: It goes through a run of aeration and settling cycles before a final settle and pump out That sounds complicated and the effluent would go untreated if there was any problem, whereas the 3 chamber types work to a high % of optimum without power. Link to comment Share on other sites More sharing options...
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