Mobile Toilet Septic Tank Installation

The installation of a mobile toilet septic tank can refer to the following steps:

Excavate the Foundation Pit

Dig a foundation pit at an appropriate location outside the toilet, with a length of 2 meters, a width of 1.1 meters, and a depth determined according to the actual situation, commonly 1.6 meters. The bottom of the pit needs to be compacted with triple-layer soil to ensure a stable foundation and avoid subsequent subsidence or tilting of the septic tank. Compacting the soil is a crucial step to prevent rainwater from flooding in and causing the septic tank to tilt or float.

Assemble the Septic Tank

1. Apply Sealant: After placing the septic tank flat, evenly apply sealant in the shell's card slots to ensure a full and uninterrupted layer of glue, preventing leakage.
2. Install Partition Plates: From the water inlet direction (at the vent hole), place the partition plates into the shell's card slots in a 2:1:3 ratio, dividing the septic tank into different functional areas.
3. Install the Sewage Pipes: Cut four sections of 110PVC pipes (two sections 50cm long and two sections 10cm long), connect them with 90-degree elbows, and apply PVC glue to the joints. Install two sets of elbows in the partition plate holes, with the short pipe ends connected to the partition holes and the long pipe ends perpendicular to the side of the partition plate near the inlet pipe, forming a channel for sewage flow.
4. Install Sealing Gaskets: Place the rubber gaskets at the concave and convex grooves of the septic tank, overlapping the joints to enhance sealing.
5. Install the Upper Piece and Fasten: Place the partition plates into the upper half's card slots accordingly, first fix the screws around the perimeter to determine the position, and then tighten them one by one to ensure structural stability.

Place and Connect the Septic Tank

1. Position in the Pit: Place the assembled septic tank into the foundation pit and connect it to the toilet with a 110 pipe. The end of the connecting pipe should be higher than the end of the septic tank, but the drop should not be too large, with the angle to the horizontal plane controlled between 15° and 20°, and a 45-degree elbow can be used for transition, to avoid sewage backflow or blockage.
2. Install the Exhaust Pipe: Connect a 75 exhaust pipe above the septic tank for the discharge of fermented biogas, preventing gas accumulation and potential safety hazards.

Backfill the Foundation Pit

The backfill soil should be fine-grained soil, free of organic matter, frozen soil, bricks, stones, and other hard objects or construction waste. Compact it layer by layer manually to avoid local violent impacts that could displace or damage the septic tank. Continuously check the fixation of the septic tank during the backfilling process to ensure it remains stable and does not tilt.

Precautions

• Soil Compaction and Fixation: The soil must be compacted before installation, and the septic tank should be firmly fixed to prevent tilting or floating due to insufficient sewage after rainwater flooding.
• Sealing Inspection: Ensure that all joints are tightly sealed during assembly to prevent sewage leakage and environmental pollution.
• Angle Control: The angle of the connecting pipe should strictly follow the standards to ensure smooth sewage flow.