Fig. 10 Mantis M Series Pressure Distribution – Orifice Layout Fig. 11 Mantis Series Venting Diagram Fig. 12 Mantis Series 2” By-Pass Line Fig. 13 Mantis Series 2” By-Pass Line, Close Up 2015 Vermont Mantis M Design & Installation Manual Page 2 www.eljen.com...
This can be accomplished by using a mechanical or hand methods. Specified Sand between the modules must be stabilized using a tamping rod. Please contact Eljen Corporations Technical Services Department if more information is needed.
Mantis M General Description Note: To receive design standards for specially engineered dosing systems or commercial systems, contact Eljen’s Technical Resource Department at 1-800-444-1359. Mantis M series systems must be designed and constructed according to this Design & Installation Manual and the State of Vermont Environmental Protection Rules, Chapter 1, effective September 29, 2007 (hereinafter the Regulations).
5.1 units, divide by 10 ft² per unit and round up to the nearest whole number of units. 5. The minimum number of bedrooms for residential designs shall be 2 bedrooms unless otherwise dictated by the regulations. 2015 Vermont Mantis M Design & Installation Manual Page 5 www.eljen.com...
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5.1 units, divide by 10 ft² per unit and round up to the nearest whole number of units. 5. The minimum number of bedrooms for residential designs shall be 2 bedrooms unless otherwise dictated by the regulations. 2015 Vermont Mantis M Design & Installation Manual Page 6 www.eljen.com...
Please refer to the Vermont Wastewater System & Potable Water Supply Rules for more information. 1.2 NON-RESIDENTIAL BUILDINGS & RESIDENTIAL INSTITUTIONS: Commercial systems require different sizing and design criteria as compared to residential systems. Please contact Eljen’s Technical Resource Department at 1-800-444- 1359 for more information on commercial systems.
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State regulations require that the system is upsized by 25% NOTE: Eljen recommends the use of septic tank outlet effluent filters on all systems, especially on those systems that a garbage disposal is installed, even if the tanks design capacity has been increased. Filters with higher filtration are recommended for systems with garbage disposals.
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6" SPECIFIED SAND 12" 24" 24" 36" 6" MIN 6" MIN FIGURE 3: MANTIS M PLAN VIEW MANTIS 5.2 MANTIS 5.1 60" 8" 4" 60" 8" 4" 24" 12" 2015 Vermont Mantis M Design & Installation Manual Page 9 www.eljen.com...
The minimum separation shall be 4’ of naturally occurring, undisturbed soil between 3.2 TRENCH ROW SPACING: adjacent absorption trenches. The Mantis M units and Specified Sand must be installed level at their design elevations. 2015 Vermont Mantis M Design & Installation Manual Page 10 www.eljen.com...
Divert surface runoff with diversion ditches or berms. Finish grade to prevent surface ponding. Seed or sod excavated areas to protect against erosion. Do not drive or pave over the absorption area. 2015 Vermont Mantis M Design & Installation Manual Page 11 www.eljen.com...
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SPECIFIED SAND SPECIFIED SAND 6" 6" 24" 12" FIGURE 5: MANTIS M MULTIPLE TRENCH PLAN VIEW SPECIFIED SAND DISTRIBUTION BOX SEPTIC TANK 6" PER DESIGN NATIVE SOIL PER DESIGN 2015 Vermont Mantis M Design & Installation Manual Page 12 www.eljen.com...
Divert surface runoff with diversion ditches or berms. Finish grade to prevent surface ponding. Seed or sod excavated areas to protect against erosion. Do not drive or pave over the absorption area. 2015 Vermont Mantis M Design & Installation Manual Page 13 www.eljen.com...
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FIGURE 7: MANTIS M BED SYSTEM PLAN VIEW SPECIFIED SAND D-BOX PER DESIGN 6" PER DESIGN Note: Units distal ends should not be tied together for sloped bed configurations. 2015 Vermont Mantis M Design & Installation Manual Page 14 www.eljen.com...
10. Begin placing Specified Sand between the Filter Support Modules and to the sides of the units. Specified Sand must be placed lightly and may be accomplished with a backhoe or other suitable equipment. DO NOT dump full loads of Specified Sand directly on the units. 2015 Vermont Mantis M Design & Installation Manual Page 15 www.eljen.com...
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Divert surface runoff with diversion ditches or berms. Finish grade to prevent surface ponding. Seed or sod excavated areas to protect against erosion. Do not drive or pave over the absorption area. 2015 Vermont Mantis M Design & Installation Manual Page 16 www.eljen.com...
PLOW OR "TILL" NATIVE MATERIAL PER STEP 4 12" MIN OF MOUND INSTALLTION GUIDELINES PER CODE NOTE: Elevated mound systems require a minimum of 12 inches of Specified Sand below the units. 2015 Vermont Mantis M Design & Installation Manual Page 17 www.eljen.com...
D-box back to a knockout or riser on the septic tank or pump chamber. This maintains the continuity of airflow from the field. FIGURE 11: MANTIS M SERIES VENTING DIAGRAM SHRUB MOUNDED BACKFILL OVER UNITS CLEAN BACKFILL FINISHED GRADE 2015 Vermont Mantis M Design & Installation Manual Page 19 www.eljen.com...
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OR SEPTIC TANK 6" PER DESIGN SERIES 2” BY-PASS LINE, CLOSE UP FIGURE 13: MANTIS M MIN 2" DIA BY- PASS AIR LINE PUMP D-BOX OUT TO SYSTEM TANK SEPTIC TANK 2015 Vermont Mantis M Design & Installation Manual Page 20 www.eljen.com...
Pumped systems shall have an oversized distribution box utilizing a velocity reduction tee or baffle. Eljen mandates venting when the system will have more than 18” of cover material as measured from the top of the unit to finished grade.
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In the mid-1980s, we introduced our Geotextile Sand Filter products for the passive advanced treatment of onsite wastewater in both residential and commercial applications. Today, Eljen is a global leader in providing innovative products and solutions for protecting our environment and public health.
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