What to Consider Before Your New Septic System Installation

Planning a septic tank installation is a big step for any homeowner. It affects your daily comfort, your property value, and your local environment. At B&B Family Plumbing, we’ve seen how the “hidden” decisions made before installation can either set a system up for decades of trouble-free service or cause constant headaches.

Before anyone brings a backhoe onto your property, here are the key things you need to think through.

1. Understand How a Septic System Fits Your Property

A septic system is an on-site wastewater treatment setup that handles everything from toilets, sinks, and showers when you’re not connected to a municipal sewer. The design and size of your system depend on several property-specific factors, including:

• Household size
• Soil type and drainage
• Lot size and slope
• Distance to wells, streams, or lakes
• Local regulations and climate

Before installation, a qualified professional should walk your property, note these conditions, and explain what kinds of systems are realistic for your site.

For a solid technical overview of typical septic systems and their components, the EPA’s septic systems page is a helpful resource.

2. Know Local Codes, Permits, and When Sewer Is Required

Every area has its own rules about septic systems. In some places, if a public sewer line is available within a certain distance, you may be required to connect instead of installing or replacing a septic system.

Before you move forward, make sure you understand:

• Permit requirements – Which department issues septic permits and what plans or drawings are needed
• Setback rules – Minimum distances from wells, property lines, and water bodies
• Inspection steps – Whether the health department or a local inspector must approve the design and check the system during or after installation

B&B Family Plumbing can help you navigate these requirements so your project stays compliant and on schedule.

3. Get a Proper Soil and Site Evaluation

Your soil is just as important as your tank. If water can’t soak into the ground at the right speed, the system won’t work properly. That’s why most septic designs start with a site and soil evaluation, which may include:

• Soil borings or test pits – To see soil layers, texture, and depth to rock or groundwater
• Percolation (“perc”) tests – To measure how quickly water drains through the soil
• Drainfield layout – Planning where trenches or beds can go, based on slopes and setbacks

If your soil drains too quickly, wastewater might not get treated well enough. If it drains too slowly or the water table is too high, the system can back up and fail. A good evaluation makes sure the design fits the land.

4. Choose the Right System Size and Type

Septic systems are not one-size-fits-all. They must be sized based on how much wastewater your home will actually produce. Typically, designers look at:

• Number of bedrooms (as a proxy for occupancy)
• Expected daily water use
• Local code formulas for tank and drain field sizing

Beyond size, you’ll also need to decide on system type, such as:

• Conventional gravity system – Standard tank and drainfield where gravity moves effluent
• Pressure distribution or mound systems – Used on challenging sites, shallow soils, or high water tables
• Aerobic treatment units – Add oxygen to treat wastewater more intensively before it reaches the soil

Your installer should explain why they recommend one design over another for your property and budget.

5. Consider Tank Materials and Components

Septic tanks themselves come in different materials, each with pros and cons:

• Concrete – Durable and heavy (won’t float), but can crack if poorly installed
• Fiberglass or plastic – Lightweight and easier to install, but must be properly bedded and anchored

Ask about:

• Baffles or tees at the tank inlet and outlet to keep solids out of the drainfield
• Access risers and lids brought near ground level for easier inspections and pumping
• Effluent filters that provide extra protection for the drainfield

These details directly impact how easy your system is to service and how long it will last.

6. Plan the Best Location on Your Lot

Once you know the general design, placement becomes the next big decision. A good layout will:

• Protect drinking water wells and nearby streams or ponds
• Stay clear of future building plans, driveways, patios, and sheds
• Avoid areas where cars, trucks, or heavy equipment will drive or park (which can crush pipes and compact soil)
• Respect minimum setback distances required by code

You’ll also want to think about day-to-day convenience. For example, make sure there’s vehicle access for pump trucks to reach the tank without driving over the drain field.

7. Understand the Full Cost – Not Just the Install

The price tag for septic tank installation is more than just the tank itself. When comparing quotes, ask each contractor to clearly spell out:

• Design and permitting fees
• Excavation and installation
• Tank, pipe, gravel, pumps (if needed), and other materials
• Electrical work for any powered components
• Site restoration (grading, seeding, driveway repairs, etc.)

Also consider long-term costs:

• Pumping frequency and cost
• Electricity for pumps or aerators (if included)
• Expected lifespan of the tank and drainfield
• Potential future expansion needs if you plan to add bedrooms

A slightly higher upfront cost for a well-designed system can save you thousands of dollars in repairs or premature replacement later.

8. Think Ahead About Maintenance

A new septic system isn’t “set it and forget it.” From day one, you should know:

• How often the tank should be inspected and pumped
• What to avoid flushing or pouring down drains
• How to protect the drainfield from compaction and heavy water runoff

Planning for maintenance at the installation stage keeps your system in good shape and helps you avoid unexpected failures. For deeper homeowner tips, the EPA’s homeowner guides on septic care are worth bookmarking.

9. Choose an Experienced, Local Installer

The company you hire is just as important as the system design. Look for:

• Proper licensing and insurance
• Experience with systems similar to what you need
• Clear, written estimates with detailed scope
• Good communication and a willingness to answer questions

At B&B Family Plumbing, we help homeowners through every step of the process—from evaluating your property and coordinating with local inspectors to installing the system and explaining how to care for it. To learn more about how we handle septic tank installation projects from start to finish, visit our septic tank installation services page.

Final Thoughts: Start with Good Information

A septic system is a long-term investment in your home. When you take the time to:

• Understand your site
• Follow local rules
• Choose the right design and size
• Work with a qualified installer

…you’re setting yourself up for decades of reliable, low-stress performance.

If you’re ready to explore options for a new system—or you just want honest answers before you commit—reach out to B&B Family Plumbing. We’ll help you make confident decisions before your new septic system installation begins.