K-3 for Base and Drainage
K-3 sand is a washed sand commonly used for septic drain fields, drainage systems, and general construction projects. Its specific gradation and low fines content make it ideal for filtration and infiltration applications where consistent percolation is required. This aggregate material is available for bulk pickup or delivery
Why Choose K-3 Sand
K-3 sand is valued for its high permeability and natural filtration properties. With a percolation rate of 2 to 6 inches per hour, it allows water to move through steadily without pooling or clogging.
This drainage sand contains minimal silt and clay, which keeps it from packing too tightly over time. Its particle size distribution offers a reliable balance between filtering out pathogens and suspended solids while maintaining consistent flow, making it a trusted choice for septic system installers and contractors alike.
Material Type: Washed concrete-grade sand
Percolation Rate: Approximately 2 to 6 inches per hour.
Fines Content: Low silt and clay content for consistent, long-term permeability.
Drainage Characteristics: High permeability with excellent natural filtration performance.
Compaction: Should not be over-compacted, as heavy machinery can crush pore spaces and reduce infiltration capacity.
K-3 sand is commonly used across a range of drainage and construction projects.
Septic Systems: Drain fields and leach field construction.
Drainage: Filtration layers, drainage trenches, and water management systems.
Construction: Backfill, bedding, and base material for various site applications.
Filtration: Natural filtering of pathogens and suspended solids in wastewater systems.
Utility Projects: Trench work and drainage layers for infrastructure installations.
Common Uses
• Septic drain fields and leach fields
• Drainage trenches and filtration systems
• Backfill for pipes and utility installations
• Wastewater filtration layers
• General construction bedding and base material
• Infrastructure and utility trench work
What is K-3 sand used for? K-3 sand is commonly used for septic drain fields, drainage trenches, filtration systems, and general construction backfill. Its gradation allows for reliable percolation and natural filtration.
What is the percolation rate of K-3 sand? K-3 sand typically has a percolation rate of 2 to 6 inches per hour, allowing water to filter through efficiently without pooling.
Does K-3 sand compact well? K-3 sand should not be heavily compacted, as doing so can crush the pore spaces and reduce its ability to drain water effectively. It performs best when installed loosely for drainage purposes.
How much K-3 sand do I need for a septic system? The amount needed depends on the size of the drain field and local percolation
requirements. It's best to consult your septic system design or local health department guidelines for exact specifications.
Is K-3 sand suitable for drainage projects? Yes. Its low fines content and high permeability make it well-suited for drainage trenches, filtration layers, and septic system applications.
Should I use geotextile fabric with K-3 sand? Yes, using geotextile fabric between the sand and native soil is recommended in trench applications to prevent fine dirt from migrating into and clogging the sand layer.
