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The Dos and Don’ts to Installing an Underground Plastic Septic or Water System

Let’s face it; no one wants to talk about septic tank issues. But when it comes to installing a septic tank or system you are in good hands with us. Using a polyethylene plastic tank for your sewage system has many advantages over a concrete or a steel tank. Here are some advantages to list a few:

  • Non-Corrosive for long life
  • Lightweight for ease of installation
  • Easily repaired in the unlikely event of damage
  • Lower overall cost

Plastic tanks are an excellent choice to help meet your Septic or Water System requirements. All tanks should be installed and maintained using a specific set of instructions to ensure that the tank and system will have a long life span. Here a few dos and don’ts for installing plastic tanks. Most tank manufacturers should have these instructions available to you at the time of the purchase and they should be followed in all cases.

Dos

  • Make sure the tank is only used for underground and completely buried applications
  • Make sure water temperature does not exceed 130° F
  • Make sure the tank is not exposed to areas with vehicular traffic
  • Use caution with machinery used to handle tanks to avoid damage
  • Use lifting eyes or lugs when placing tank
  • Make sure tank is level before backfilling
  • Use 50/50 mixture of sand and gravel for bedding and backfill
  • Make sure backfill is free of debris such as rocks, concrete and wood
  • Allow 18” to 24” of space around sides and ends for proper backfilling
  • Make sure backfill is evenly dispersed around the tank lightly compacted 12” layers
  • Add water to tank at the rate of 12” to 12” of backfill material
  • Ensure that the connections to the inlet, outlet, risers and lids are water tight
  • Adhere to the tank manufacture’s maximum and minimum burial depth requirements
  • The soil should be mounded over the tank to ensure proper drainage away from the tank
  • Make sure after pumping the tank due to routine maintenance to fill with water as soon as possible to reduce the chance of flotation

Don’ts

  • Don’t use septic tanks as a grease trap
  • Don’t install in high ground water areas
  • Don’t locate a tank under a lawn or any area that water may cause excess weight load
  • Don’t  allow the tank to be dropped from an elevation over 4” and don’t let something unnecessarily impact the tank in cold weather
  • Don’t back-fill one side at a time

Adhering to these dos and don’ts should help you have, a successful septic systems for years to come.

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