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DRIP DEFINITIONS & SPECIFICATIONS

GENERAL DRIP DESIGN DEFINITIONS

Run

One continuous length of tubing run across contour connected to a supply line or return line or another run.
Lateral

One run or a series of runs connected at one end to a supply manifold and the other end connected to a return manifold.
ZoneA group of laterals dosed at the same time.
Field flushingThe routine maintenance act of cleaning drip tubing by opening the end of a lateral and creating scouring velocities in the same direction of flow in the tubing to remove solids which may plug an emitter.
Flow equalizationStorage of effluent peak flows to provide for even time dosing of dripper lines. It is designed into system by distance between the enable float and the alarm float.
Mechanical filtrationMechanical filtration of the applied effluent to prevent emitter plugging.
Supply ManifoldThe supply pipe feeding a zone to which laterals are connected.
Return ManifoldThe pipe carrying field flushing wastewater from a zone.
Dripper line loading rateThe amount of contaminants dispersed by the dripper line. This material shall be described in generally accepted engineering units such as gallons per day of water and pounds per day of contaminant (BOD, FOG, Solids, etc)
StandoffThe vertical and horizontal separation distance from receiving environment limitations.
MonitoringPeriodic inspection of system for performance.
PretreatmentConditioning of effluent prior to dispersal by drip system.
DraindownThe action of effluent left in the distribution system after the pump shuts off that drains by gravity to the lower lines in the system.
ControlElectromechanical Operational interface device used to operate the system. Automatic Control is operation without human physical actions. Manual control operation is the operation of a system which bypasses or is not performed by automatic equipment.

Installation Instructions

Site Preparation Specifications

One of the most important concerns for a Drip Disposal System used in shallow placement conditions is to protect the site from soil disturbance by heavy equipment. Removal or compaction of the topsoil, especially during wet weather, may destroy the site's suitability for a system. As soon as the absorption area has been designated, it should be flagged, roped off and "quarantined from construction traffic. No site preparation or construction work should occur if the soil is wet. As a rule of thumb, if the soil is too wet to plow, it is too wet to disturb for system construction.

After the location is staked out and the soil is dry enough to plow, the site should be cleared of brush and small trees. Provisions must be made for intercepting or diverting surface water and shallow ground water away from the absorption area, septic tank and pumping chamber. This can be done with grassy swales, open ditches or curtain drains.

If the site requires imported fill to improve surface drainage, it must be incorporated evenly into the underlying natural soil. Clayey and fine sand materials as fills should be avoided. It is very important that no sharp interface remain between the natural and imported soil layers. There should be no low spots or depressions, and the final shape should shed, rather than accumulate rainwater.

After the area has been cleared and shaped, the location of the tubing runs and supply manifold should be accurately staked out according to design specifications. Each run should be laid out along a contour. One run may be higher or lower than the next one, but each individual run should follow a contour evenly.

Treatment Vessel:Install in accordance with manufacturer's instructions.
Dosing Tank:Install in accordance with manufacturer's instructions.
Hydraulic Unit:See installation sequence enclosed.
Float Switches:Install four float vertical float bar (removable for adjustment).

Force Main & Field Flush Manifold, Dripper Field

Run force main and distribution manifolds as per design specifications. Guidelines for Dripper Line Installation recommend that the drip tubing runs have a minimum spacing of 18". Do not exceed 300' on any lateral. Install air release/vacuum breaker with gravel in 6" valve box at the highest point of the field or elevated zone returns. One breaker per dripper zone is provided. Install dripper line with vibratory plough, trencher, or by hand without any kinks and without any rocks or debris in direct contact. Connect BioLine® dripper line to flexible PVC assembly. Flexible PVC must extend a minimum of 12" into the run trench before connecting to dripper line to protect tubing from crimping. Connect field flush return manifold in same manner as the supply manifold. Continue to run P.V.C. from manifold back to the unit so that the dripper lines can be flushed automatically. DO NOT CONNECT return line air valves until the system has been flushed. Dripper line should always be run parallel to ground contours and field flush from the highest point.

When connecting flexible pipe (i.e. loops) to adjacent drip tubing runs to combine into a single lateral, the loops should be constructed to drain to each individual run to prevent freezing and draindown to the lowest run.

Never leave the dripper line or PVC lines with open ends during the construction process. Duct tape may be used to close all exposed ends until permanent connections are made. Care must be taken to keep all construction debris from entering force mains, manifolds and dripper line.

Electrical Connections

There are three types of electrical control systems available. The first is a simplified onsite alarm system which is the same as most other onsite pump system technologies. The second is a fully monitored control system with remote alarming through telephone dialers by voice or machine recording readouts. The optional fully monitored system requires a phone line be supplied to the central unit controller direct from the telephone service company. The line may be used for other purposes but the control system must have priority to "break in" in the event of an alarm. These control systems typically include flow monitoring, high level alarm, battery backup dialing for power outages. The third type requires a dedicated phone line and is remotely monitored and controlled.

The standard control system provides the same monitoring as any other pump system. In the event of a pump malfunction or plugged valve, the water would rise in the pump chamber and result in a high water alarm. Someone onsite would need to make the repair or call a service person to correct the situation. In the event of a broken pipe or overloaded soils a wet spot in the field would result again requiring someone to find the problem and initiate the repair procedures.

The designer must determine which type of unit is applicable for the specific site. The designer should analyze the risk and recommend the proper system. The cost of the fully monitored system can be much higher but can also provide a system which can be operated from off site, lowering O & M costs and it also greatly lowers the risk of public health or environmental problems.

Landscaping and Drainage

All landscaping, filling and site drainage completed before and after the installation must be done in a manner to ensure the integrity of the soil absorption system. Use of imported fill must be done in accordance with local health department. Gutter and down spout drains should be directed away from the system.

Finally, the entire area should be planted with grass in order to prevent erosion. The soil should be properly tilled, limed (if necessary) and fertilized before planting. After applying an appropriate grass seed, the area should be heavily mulched with straw or other suitable material.


AMERICAN MANUFACTURING COMPANY, INC.
Last revised: Mar-4-2016
Comments to: info@americanonsite.com
Copyright © American Manufacturing Company, Inc., 2000

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