{"id":115,"date":"2022-07-11T13:44:58","date_gmt":"2022-07-11T17:44:58","guid":{"rendered":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/?post_type=chapter&p=115"},"modified":"2022-07-11T14:06:34","modified_gmt":"2022-07-11T18:06:34","slug":"describe-the-installation-of-catch-basins","status":"publish","type":"chapter","link":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/chapter\/describe-the-installation-of-catch-basins\/","title":{"raw":"Learning Task 4","rendered":"Learning Task 4"},"content":{"raw":"The following is the lone reference to catch basins within the within the NPC:\r\n
2.2.6.2. (1)\u00a0 Cast iron frames and covers used with manholes shall conform to CSA B70.1 (Frames and Covers for Maintenance Holes and Catch Basins)<\/blockquote>\r\n

Catch Basin Location and Layout<\/h1>\r\nCatch basins are strategically placed to capture excess water and move it into a wastewater system or other underground system. While many residential properties do not require catch basins, the mandate for those that do will have come from either the architect during the drafting process, the AHJ through the plan approval process, or the general contractor in recognition of specific site conditions that require them. The need for a catch basin \u201cafter the fact\u201d should be avoided at all costs because it is much more difficult to install remedial equipment after the site has been landscaped.\r\n\r\nHere are some points to consider in determining where a catch basin may be needed, and points to help in its installation.\r\n

Pick the Location<\/h2>\r\nIf it\u2019s already clear where the drain needs to be, start by planning the material and height that will be needed for optimal water handling and capture. If necessary, it\u2019s helpful to wait until a heavy rain to observe where water and debris tend to flow and gather, provided possible damage from flooding during the process doesn\u2019t occur. Having a slight slope of at least 1% (approx. [latex]\\dfrac{1}{8}[\/latex]\u2033\/ft) toward that area will be ideal for directing water there.\r\n

Install the Catch Basin<\/h2>\r\nA hole slightly deeper and larger than the catch basin itself should be dug. This will allow the placement, compaction and leveling of bedding material under the basin. This is especially important if there is to be any vehicular traffic on top of it. Make sure the construction of the catch basin will support those potential loads. The catch basin can be bedded and backfilled enough to allow the attachment of the piping without dislodging the basin.\r\n

Create the Trenches<\/h2>\r\nTrenches should be wide enough to contain the pipes, with about 3 inches of clearance on either side for working room and bedding. Make sure to grade the trenches to a minimum of 1% (approx. [latex]\\dfrac{1}{8}[\/latex]\u2033\/ft) or to the grades specified in the plans. Trenches should start at the catch basin and be dug straight towards the junction of other drainage pipes or its destination. Any changes in direction should be accomplished by using manufactured fittings. If not using sand or other fine bedding material, make sure there are no large rocks or boulders left in the trench that may damage the pipe. If the ground is made of aggregate that allows good drainage through it, it is sometimes a good idea to line the trench bottom with drain rock and use perforated sewer pipe which creates a \u201cFrench drain\u201d; if not wishing to let any water seep out into the surrounding soil, sewer pipe with tight joints should be used and the trench bottom should be compacted.\r\n

Lay the Pipe<\/h2>\r\nNow it\u2019s time to lay the pipes in the trench. Start by connecting the first pipe to the catch basin, bedding and backfilling it just enough so that the pipe doesn\u2019t shift when the next section downstream is attached to it. \u201cFlow-through\u201d type catch basins have an inlet and an outlet so they can be installed inline on a run of pipe. This only works if the top of the catch basin grate is exactly at the desired elevation; if it isn\u2019t, subsequent downstream catch basins are installed and connected to the piping through a wye fitting.\r\n

Testing and Back-Fill<\/h2>\r\nUsing water from a hose, test out the system. Get a good flow of water going through the most upstream catch basin and look for leaks or problem areas that should be fixed before the back-filling process. Make sure the flow into the catch basin is smooth. Once satisfied there are no issues, back-fill the trenches and holes with sand, gravel or whatever material has been specified. If inspection is required, it should be done at this step. Once tested and inspected, the backfilling can be completed and the final grade can be met.\r\n\r\nNow complete Self-Test 2 and check your answers.\r\n

Self-Test 2<\/h1>\r\n
\r\n

Self-Test 2<\/p>\r\n\r\n<\/header>\r\n

\r\n
    \r\n \t
  1. According to the NPC and BCPC, what is the minimum horizontal dimension of a manhole?\r\n
      \r\n \t
    1. 1 m<\/li>\r\n \t
    2. 1.5 m<\/li>\r\n \t
    3. 2 m<\/li>\r\n \t
    4. 3 m<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
    5. According to the NPC and BCPC, a ladder is required to be provided with a manhole if it is over what minimum depth?\r\n
        \r\n \t
      1. 600 mm<\/li>\r\n \t
      2. 1 m<\/li>\r\n \t
      3. 1.5 m<\/li>\r\n \t
      4. 2 m<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
      5. What is the minimum suggested thickness of a leveling course of compacted fill used to set a manhole onto?\r\n
          \r\n \t
        1. 1 inch (25 mm)<\/li>\r\n \t
        2. 3 inches (75 mm)<\/li>\r\n \t
        3. 6 inches (150 mm)<\/li>\r\n \t
        4. 12 inches (300 mm)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
        5. How far beyond the outside edge of a manhole should the leveling course from the previous question extend?\r\n
            \r\n \t
          1. 1 inch (25 mm)<\/li>\r\n \t
          2. 3 inches (75 mm)<\/li>\r\n \t
          3. 6 inches (150 mm)<\/li>\r\n \t
          4. 12 inches (300 mm)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
          5. What is the area surrounding the channels in a sanitary manhole called?\r\n
              \r\n \t
            1. Slurry<\/li>\r\n \t
            2. Seating<\/li>\r\n \t
            3. Flat area<\/li>\r\n \t
            4. Benching<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
            5. What do some installers use as a form for the channels in a sanitary manhole, if they are not pre-cast into the base?\r\n
                \r\n \t
              1. Pipe that is the same diameter as the channel<\/li>\r\n \t
              2. Treated wood sawn into a semi-circular shape<\/li>\r\n \t
              3. Pipe that is one diameter larger than the channel<\/li>\r\n \t
              4. Large, smooth river rock that is then removed before troweling<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
              5. What should be the minimum thickness of the high quality concrete used for benching and channeling?\r\n
                  \r\n \t
                1. 1 inch (25 mm)<\/li>\r\n \t
                2. 2 inches (50 mm)<\/li>\r\n \t
                3. 3 inches (75 mm)<\/li>\r\n \t
                4. 4 inches (100 mm)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                5. To effectively direct surface runoff water to a catch basin, what should be the minimum amount of slope for the ground area surrounding it|?\r\n
                    \r\n \t
                  1. 0.5% ([latex]\\dfrac{1}{16}[\/latex]\u2033\/ft)<\/li>\r\n \t
                  2. 1% ([latex]\\dfrac{1}{8}[\/latex]\u2033\/ft)<\/li>\r\n \t
                  3. 1.5% ([latex]\\dfrac{3}{16}[\/latex]\u2033\/ft)<\/li>\r\n \t
                  4. 2% ([latex]\\dfrac{1}{4}[\/latex]\u2033\/ft)<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                  5. The use of drain rock and perforated sewer pipe to collect or disperse water is known as what?\r\n
                      \r\n \t
                    1. A \u201cFrench\u201d drain<\/li>\r\n \t
                    2. An \u201cEnglish\u201d drain<\/li>\r\n \t
                    3. A \u201cEuropean\u201d drain<\/li>\r\n \t
                    4. A \u201cNorth American\u201d drain<\/li>\r\n<\/ol>\r\n<\/li>\r\n \t
                    5. What type of catch basin has a grate as well as a pipe inlet and a pipe outlet?\r\n
                        \r\n \t
                      1. A concrete type<\/li>\r\n \t
                      2. A prohibited type<\/li>\r\n \t
                      3. A double pipe type<\/li>\r\n \t
                      4. A flow-through type<\/li>\r\n<\/ol>\r\n<\/li>\r\n<\/ol>\r\nCheck your answers using the\u00a0Self-Test Answer Keys<\/a>\u00a0in Appendix 1.\r\n\r\n<\/div>\r\n<\/div>","rendered":"

                        The following is the lone reference to catch basins within the within the NPC:<\/p>\n

                        2.2.6.2. (1)\u00a0 Cast iron frames and covers used with manholes shall conform to CSA B70.1 (Frames and Covers for Maintenance Holes and Catch Basins)<\/p><\/blockquote>\n

                        Catch Basin Location and Layout<\/h1>\n

                        Catch basins are strategically placed to capture excess water and move it into a wastewater system or other underground system. While many residential properties do not require catch basins, the mandate for those that do will have come from either the architect during the drafting process, the AHJ through the plan approval process, or the general contractor in recognition of specific site conditions that require them. The need for a catch basin \u201cafter the fact\u201d should be avoided at all costs because it is much more difficult to install remedial equipment after the site has been landscaped.<\/p>\n

                        Here are some points to consider in determining where a catch basin may be needed, and points to help in its installation.<\/p>\n

                        Pick the Location<\/h2>\n

                        If it\u2019s already clear where the drain needs to be, start by planning the material and height that will be needed for optimal water handling and capture. If necessary, it\u2019s helpful to wait until a heavy rain to observe where water and debris tend to flow and gather, provided possible damage from flooding during the process doesn\u2019t occur. Having a slight slope of at least 1% (approx. [latex]\\dfrac{1}{8}[\/latex]\u2033\/ft) toward that area will be ideal for directing water there.<\/p>\n

                        Install the Catch Basin<\/h2>\n

                        A hole slightly deeper and larger than the catch basin itself should be dug. This will allow the placement, compaction and leveling of bedding material under the basin. This is especially important if there is to be any vehicular traffic on top of it. Make sure the construction of the catch basin will support those potential loads. The catch basin can be bedded and backfilled enough to allow the attachment of the piping without dislodging the basin.<\/p>\n

                        Create the Trenches<\/h2>\n

                        Trenches should be wide enough to contain the pipes, with about 3 inches of clearance on either side for working room and bedding. Make sure to grade the trenches to a minimum of 1% (approx. [latex]\\dfrac{1}{8}[\/latex]\u2033\/ft) or to the grades specified in the plans. Trenches should start at the catch basin and be dug straight towards the junction of other drainage pipes or its destination. Any changes in direction should be accomplished by using manufactured fittings. If not using sand or other fine bedding material, make sure there are no large rocks or boulders left in the trench that may damage the pipe. If the ground is made of aggregate that allows good drainage through it, it is sometimes a good idea to line the trench bottom with drain rock and use perforated sewer pipe which creates a \u201cFrench drain\u201d; if not wishing to let any water seep out into the surrounding soil, sewer pipe with tight joints should be used and the trench bottom should be compacted.<\/p>\n

                        Lay the Pipe<\/h2>\n

                        Now it\u2019s time to lay the pipes in the trench. Start by connecting the first pipe to the catch basin, bedding and backfilling it just enough so that the pipe doesn\u2019t shift when the next section downstream is attached to it. \u201cFlow-through\u201d type catch basins have an inlet and an outlet so they can be installed inline on a run of pipe. This only works if the top of the catch basin grate is exactly at the desired elevation; if it isn\u2019t, subsequent downstream catch basins are installed and connected to the piping through a wye fitting.<\/p>\n

                        Testing and Back-Fill<\/h2>\n

                        Using water from a hose, test out the system. Get a good flow of water going through the most upstream catch basin and look for leaks or problem areas that should be fixed before the back-filling process. Make sure the flow into the catch basin is smooth. Once satisfied there are no issues, back-fill the trenches and holes with sand, gravel or whatever material has been specified. If inspection is required, it should be done at this step. Once tested and inspected, the backfilling can be completed and the final grade can be met.<\/p>\n

                        Now complete Self-Test 2 and check your answers.<\/p>\n

                        Self-Test 2<\/h1>\n
                        \n
                        \n

                        Self-Test 2<\/p>\n<\/header>\n

                        \n
                          \n
                        1. According to the NPC and BCPC, what is the minimum horizontal dimension of a manhole?\n
                            \n
                          1. 1 m<\/li>\n
                          2. 1.5 m<\/li>\n
                          3. 2 m<\/li>\n
                          4. 3 m<\/li>\n<\/ol>\n<\/li>\n
                          5. According to the NPC and BCPC, a ladder is required to be provided with a manhole if it is over what minimum depth?\n
                              \n
                            1. 600 mm<\/li>\n
                            2. 1 m<\/li>\n
                            3. 1.5 m<\/li>\n
                            4. 2 m<\/li>\n<\/ol>\n<\/li>\n
                            5. What is the minimum suggested thickness of a leveling course of compacted fill used to set a manhole onto?\n
                                \n
                              1. 1 inch (25 mm)<\/li>\n
                              2. 3 inches (75 mm)<\/li>\n
                              3. 6 inches (150 mm)<\/li>\n
                              4. 12 inches (300 mm)<\/li>\n<\/ol>\n<\/li>\n
                              5. How far beyond the outside edge of a manhole should the leveling course from the previous question extend?\n
                                  \n
                                1. 1 inch (25 mm)<\/li>\n
                                2. 3 inches (75 mm)<\/li>\n
                                3. 6 inches (150 mm)<\/li>\n
                                4. 12 inches (300 mm)<\/li>\n<\/ol>\n<\/li>\n
                                5. What is the area surrounding the channels in a sanitary manhole called?\n
                                    \n
                                  1. Slurry<\/li>\n
                                  2. Seating<\/li>\n
                                  3. Flat area<\/li>\n
                                  4. Benching<\/li>\n<\/ol>\n<\/li>\n
                                  5. What do some installers use as a form for the channels in a sanitary manhole, if they are not pre-cast into the base?\n
                                      \n
                                    1. Pipe that is the same diameter as the channel<\/li>\n
                                    2. Treated wood sawn into a semi-circular shape<\/li>\n
                                    3. Pipe that is one diameter larger than the channel<\/li>\n
                                    4. Large, smooth river rock that is then removed before troweling<\/li>\n<\/ol>\n<\/li>\n
                                    5. What should be the minimum thickness of the high quality concrete used for benching and channeling?\n
                                        \n
                                      1. 1 inch (25 mm)<\/li>\n
                                      2. 2 inches (50 mm)<\/li>\n
                                      3. 3 inches (75 mm)<\/li>\n
                                      4. 4 inches (100 mm)<\/li>\n<\/ol>\n<\/li>\n
                                      5. To effectively direct surface runoff water to a catch basin, what should be the minimum amount of slope for the ground area surrounding it|?\n
                                          \n
                                        1. 0.5% ([latex]\\dfrac{1}{16}[\/latex]\u2033\/ft)<\/li>\n
                                        2. 1% ([latex]\\dfrac{1}{8}[\/latex]\u2033\/ft)<\/li>\n
                                        3. 1.5% ([latex]\\dfrac{3}{16}[\/latex]\u2033\/ft)<\/li>\n
                                        4. 2% ([latex]\\dfrac{1}{4}[\/latex]\u2033\/ft)<\/li>\n<\/ol>\n<\/li>\n
                                        5. The use of drain rock and perforated sewer pipe to collect or disperse water is known as what?\n
                                            \n
                                          1. A \u201cFrench\u201d drain<\/li>\n
                                          2. An \u201cEnglish\u201d drain<\/li>\n
                                          3. A \u201cEuropean\u201d drain<\/li>\n
                                          4. A \u201cNorth American\u201d drain<\/li>\n<\/ol>\n<\/li>\n
                                          5. What type of catch basin has a grate as well as a pipe inlet and a pipe outlet?\n
                                              \n
                                            1. A concrete type<\/li>\n
                                            2. A prohibited type<\/li>\n
                                            3. A double pipe type<\/li>\n
                                            4. A flow-through type<\/li>\n<\/ol>\n<\/li>\n<\/ol>\n

                                              Check your answers using the\u00a0Self-Test Answer Keys<\/a>\u00a0in Appendix 1.<\/p>\n<\/div>\n<\/div>\n","protected":false},"author":724,"menu_order":4,"template":"","meta":{"pb_show_title":"on","pb_short_title":"","pb_subtitle":"Describe the Installation of Catch Basins","pb_authors":[],"pb_section_license":""},"chapter-type":[],"contributor":[],"license":[],"class_list":["post-115","chapter","type-chapter","status-publish","hentry"],"part":37,"_links":{"self":[{"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/pressbooks\/v2\/chapters\/115","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/pressbooks\/v2\/chapters"}],"about":[{"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/wp\/v2\/types\/chapter"}],"author":[{"embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/wp\/v2\/users\/724"}],"version-history":[{"count":3,"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/pressbooks\/v2\/chapters\/115\/revisions"}],"predecessor-version":[{"id":118,"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/pressbooks\/v2\/chapters\/115\/revisions\/118"}],"part":[{"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/pressbooks\/v2\/parts\/37"}],"metadata":[{"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/pressbooks\/v2\/chapters\/115\/metadata\/"}],"wp:attachment":[{"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/wp\/v2\/media?parent=115"}],"wp:term":[{"taxonomy":"chapter-type","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/pressbooks\/v2\/chapter-type?post=115"},{"taxonomy":"contributor","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/wp\/v2\/contributor?post=115"},{"taxonomy":"license","embeddable":true,"href":"https:\/\/pressbooks.bccampus.ca\/plumbing3a\/wp-json\/wp\/v2\/license?post=115"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}