ᐅ Inspection chamber / access chamber with DN160 to DN100 pipes
Created on: 19 Nov 2018 11:32
J
JandreasHello everyone,
I am about to start installing the drainage system on our building plot for a single-family house currently under construction. The wastewater plan uses DN100 pipes throughout; DN100 has been laid from the sewer to the property boundary. The municipality (operator of the wastewater disposal facilities) does not require a transfer or inspection chamber, but since we need to connect three fairly long pipe runs on the property (2x about 20 meters (65 feet) wastewater, 1x about 10 meters (33 feet) rainwater), and want to join them only at the property boundary, we consider it sensible to install a chamber there. Not least because, with the planned 1% slope of the pipes, we have to cover about 1.5 meters (5 feet) of elevation difference at the end, which might cause flow issues. By the way, this is a combined sewer system. We decided to use a plastic inspection chamber for simplicity (I see no advantages in concrete structures). It must have a total minimum height of 2 meters ± 10cm (6 ft 7 in ± 4 in). And that brings me to my questions.
Because of the height and use, combined with cost, we planned a DN800 chamber with an open channel from Rehau. However, the selected chamber (Awas chamber PP DN800) in the still affordable version (with three entrances split at 90 degrees, as the pipes enter at 0°, 45°, and 90°, respectively, and one outlet) has minimum DN160 connections. I would like to know if it is advisable to use a reducer at the outlet without concerns, or if it would be better to find a different chamber. So far, I have not found DN800 chambers with DN100/110 connections. The two house connections, due to shallow depth (top edge of pipe about 35cm (14 inches) below ground level), will be lowered with a "drop shaft" to at least 80cm (31 inches) and receive a simple DN400 inspection chamber. I am also willing to pay less if possible, but concrete structures are not an option.
Furthermore, I am unsure about the required "drops" (about 50cm (20 inches) at the house, about 1.5 meters (5 feet) before the transfer chamber). Using a simple external "drop shaft" seems most practical to me, as there are two access points before the pipe enters the house. But I wonder if such a "drop" should be a proper vertical drop or rather a sloped chute? In your opinion, what slope is necessary or should not be exceeded here?
Thank you in advance,
Andreas
I am about to start installing the drainage system on our building plot for a single-family house currently under construction. The wastewater plan uses DN100 pipes throughout; DN100 has been laid from the sewer to the property boundary. The municipality (operator of the wastewater disposal facilities) does not require a transfer or inspection chamber, but since we need to connect three fairly long pipe runs on the property (2x about 20 meters (65 feet) wastewater, 1x about 10 meters (33 feet) rainwater), and want to join them only at the property boundary, we consider it sensible to install a chamber there. Not least because, with the planned 1% slope of the pipes, we have to cover about 1.5 meters (5 feet) of elevation difference at the end, which might cause flow issues. By the way, this is a combined sewer system. We decided to use a plastic inspection chamber for simplicity (I see no advantages in concrete structures). It must have a total minimum height of 2 meters ± 10cm (6 ft 7 in ± 4 in). And that brings me to my questions.
Because of the height and use, combined with cost, we planned a DN800 chamber with an open channel from Rehau. However, the selected chamber (Awas chamber PP DN800) in the still affordable version (with three entrances split at 90 degrees, as the pipes enter at 0°, 45°, and 90°, respectively, and one outlet) has minimum DN160 connections. I would like to know if it is advisable to use a reducer at the outlet without concerns, or if it would be better to find a different chamber. So far, I have not found DN800 chambers with DN100/110 connections. The two house connections, due to shallow depth (top edge of pipe about 35cm (14 inches) below ground level), will be lowered with a "drop shaft" to at least 80cm (31 inches) and receive a simple DN400 inspection chamber. I am also willing to pay less if possible, but concrete structures are not an option.
Furthermore, I am unsure about the required "drops" (about 50cm (20 inches) at the house, about 1.5 meters (5 feet) before the transfer chamber). Using a simple external "drop shaft" seems most practical to me, as there are two access points before the pipe enters the house. But I wonder if such a "drop" should be a proper vertical drop or rather a sloped chute? In your opinion, what slope is necessary or should not be exceeded here?
Thank you in advance,
Andreas
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