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Installing a septic tank involves several technical stages: digging the pit, preparing the base layer, positioning and levelling the tank, connecting the drain pipework, building the drainage field (where needed), compacting the soil and restoring the ground. Correct installation ensures the system works safely and prevents settling, leaks or clogged drainage.
Septic tank drainage is the system that takes the treated water and disperses it into the soil through perforated pipes and a gravel layer. It is recommended where the soil allows natural infiltration. In areas with clay soil, a high water table or low permeability, a holding tank without drainage may be chosen for safety and technical compliance.
The labour cost of installing a septic tank varies with the soil type, pit depth, tank volume, need for drainage and machinery access to the site. The final cost is set after an on-site technical assessment. We offer free advice to recommend the right solution and a personalised price estimate.
Excavation can be done by machine or by hand, depending on site access and ground type. Our team digs the pit for the septic tank, prepares the base layer, compacts the soil and restores the area after installation, so the tank remains stable and safe in the long term.
The depth of the pit is determined by:
the height of the tank
the burial depth recommended by the manufacturer
the fall of the drain pipe from the house
ground level and frost risk
Installation is carried out so that the drainage fall is correct and excessive pressure on the tank is avoided.
For correct installation, technical sizing is recommended based on:
the number of people
the daily volume of domestic wastewater
the soil type
whether drainage can be installed
Our team can provide advice, a technical sketch and recommendations on the best septic system layout.
Building the pit is only the excavation and site preparation stage, whereas installing a septic tank includes complete installation of the tank, connecting the pipes, building the drainage, backfilling and compacting the soil, testing operation and checking watertightness.
In most cases, complete septic tank installation is done in a single working day. With difficult soil, extensive drainage or limited site access, the work may be carried out in stages to ensure safe, high-quality results.
Yes. In areas with a high water table or impermeable soil, a holding tank without drainage is recommended. It is technically safe and easy to maintain, with an emptying schedule based on the level of use.
Yes — we correct faulty installations, ground settlement, clogged drainage, leaks and poorly made connections. We assess the situation on site and propose the safest remedy.