Tank Riser Installation

BOI Septic Service: Septic Tank Riser Installation

Septic Tank Riser Installation – Essential for Access, Integrity, and Compliance

What is a Septic Tank Riser?

A Septic Tank Riser is a vertical extension placed over the septic tank’s maintenance access opening (lid). Its purpose is to bring the access point up to (or close to) ground level. This eliminates the need for excavation every time your septic tank requires inspection or pumping, making maintenance easy, safer, and less disruptive.

Why Are Risers Valuable for Your Septic System?

Installing a properly sealed riser is a critical upgrade for any septic system, offering multiple benefits, especially in New Zealand’s varied climate:

1. Prevents Surface Water Ingress:
   • The most significant advantage is preventing rainwater or surface runoff from entering your tank.
   • Uncontrolled water ingress can hydraulically overload the system, reducing treatment effectiveness, potentially flushing solids into your soakage field, and leading to expensive clogging or failure.
   • This integrity is a core requirement of NZ standards like AS/NZS 1546.1.
2. Easier & Safer Maintenance:
   • No more digging! Risers save time and labor costs associated with repeated excavation and landscape repair.
   • Easy access ensures regular, required maintenance (pumping and inspection) is done, catching minor issues before they become major problems.
3. Ensures Water Tightness & Compliance:
   • A properly sealed riser connection guarantees the tank remains watertight, preventing both surface water entry and groundwater infiltration—a key requirement under the NZ Building Code (G13) and AS/NZS standards.
   • Correct installation helps systems comply with local council and national regulations, avoiding future costly retrofits or penalties.

BOI Septic Best Practice Installation

At BOI Septic, we ensure your riser is installed for maximum effectiveness and longevity:

• Watertight Seals: We use high-quality  sealants and chemical adhesives to create an impervious bond between the riser and the tank’s access port, preventing any water ingress.
• Durable Materials: We select structurally adequate materials (like durable plastic or concrete) compatible with your existing tank.
• Proper Grading: The riser height is adjusted so the lid sits flush or slightly above the finished ground level. The surrounding soil is correctly graded to ensure water sheds away from the access point, avoiding pooling and potential seepage.
• Secure Covers: A strong, watertight, and secured lid is installed to prevent unauthorised access and resist expected loading.

Invest in a Septic Tank Riser today for peace of mind, simplified maintenance, and system longevity.