500 Gallon Septic Tank – Compact Wastewater Solution for Small-Scale Needs
If you’re looking for a compact and affordable septic solution, a 500 gallon septic tank might be the right fit. Ideal for small homes, cabins, RV setups, and temporary job sites, this size tank is designed to handle light to moderate wastewater loads while maintaining safe, environmentally-friendly waste storage and processing.
In this post, we’ll cover what a 500 gallon septic tank is, how it works, who it’s best for, what it costs, and how to get one delivered and installed.
What Is a 500 Gallon Septic Tank?
A 500 gallon septic tank is a precast or plastic tank designed to handle the sewage needs of one or two users in settings without access to a municipal sewer line. Like larger septic systems, it separates solids from liquids and directs wastewater to a drain field or holding tank.
This size is common for:
- Small residential cabins
- Mobile homes
- Remote workshops
- Tiny homes
- RV and camper setups
- Temporary living or construction sites
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How Does a 500 Gallon Septic Tank Work?
The tank works in three key steps:
- Collection – Wastewater from sinks, toilets, and showers flows into the tank.
- Separation – Solids settle at the bottom (sludge), lighter particles and grease float to the top (scum), and the middle liquid layer (effluent) exits into a drain field or holding chamber.
- Disposal – Treated water drains into a soil absorption field or is pumped out for disposal, depending on the system setup.
500 Gallon Septic Tank Specs
| Specification | Details |
|---|---|
| Capacity | 500 gallons |
| Material | Polyethylene, fiberglass, or concrete |
| Weight (empty) | 200–2,000 lbs (depends on material) |
| Dimensions (avg.) | ~76″L x 48″W x 60″H |
| Inlet/Outlet Ports | 4” standard PVC fittings |
| Installation | Above ground or underground options |
Who Should Use a 500 Gallon Septic Tank?
A 500 gallon tank is ideal for:
- 1–2 person households
- Weekend cabins or cottages
- Off-grid tiny homes or RV setups
- Temporary office trailers or job sites
If your daily water usage is minimal and the space is limited, this tank size offers an affordable and efficient wastewater solution.
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How Much Does a 500 Gallon Septic Tank Cost?
Prices vary based on tank material, brand, and installation site. Here’s a typical breakdown:
| Type | Cost Range |
|---|---|
| Poly (plastic) tank | $500 – $900 |
| Fiberglass tank | $700 – $1,100 |
| Concrete tank | $800 – $1,300 |
| Installation (basic) | $1,000 – $2,500+ |
Costs increase with excavation, permits, and add-ons like risers, pumps, or drain field installation.
Maintenance Tips
To keep your tank in good shape:
- Pump every 2–3 years, depending on usage
- Avoid flushing grease, wipes, or chemicals
- Use low-flow fixtures to minimize water volume
- Schedule regular inspections to detect leaks or blockages
Where to Buy a 500 Gallon Septic Tank
For fast, dependable supply and service, visit portablecontainerspace.com. They offer:
- Poly and concrete septic tanks in various sizes
- Delivery and setup assistance
- Portable sanitation and waste storage options
- Expert help with installation and maintenance
Whether you’re outfitting a rural cabin or setting up a temporary office site, their team can recommend the right tank and configuration.
Final Thoughts
A 500 gallon septic tank is a smart choice for smaller-scale waste needs. It’s compact, cost-effective, and easy to install for short-term or light residential use. With proper care, this system can serve you reliably for years.
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