1000 Gallon Septic Tanks: Precast Concrete

1,000 Gallon Concrete Septic Tank Overview

Our 1000 gallon septic tank, made of quality precast concrete, is designed to hold 1000 gallons of liquid. A plumbing team can extend pipes from home drains to either the side or center inlets of this mid-seam style concrete septic tank.

Plumbers in the New England area appreciate that this same option is available on the tank outlet.  Pipes can carry waste water effluent from the tank to the leach field from either of the tank’s well-placed side or center outlets.

Closed-end Polylok IV plumbing boots are used for the job of installing the tank’s penetrations.  This provides flexible, water tight connection for pipes as they enter and exit the precast tank structure.

Our team produces and services this commonly-used style of tank to meet all best-practice requirements of ASTM C 1227 & NPCA.   A.J. Foss serves home and business waste water service needs by partnering with area septic system designers, plumbers, and excavation professionals throughout New Hampshire, Maine, and Northern Massachusetts.

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    This smaller-sized tank is mostly used as a pump station, holding tank, or for adding capacity to an existing septic system. That’s because the NH Department of Environmental Services (DES) Subsurface Systems Bureau revised state rules in 2012. This obsoleted specification of this tank for jobs in NH involving home waste water tank system installation.

    1000 Gallon Septic Tank Dimensions, Features/Details*

    • 1000 gallon septic tank is used in 2 bedroom systems.
    • Often used as a pump station.
    • Was the standard size in NH for many years, is the standard in Maine.
    • This is the smallest size recommended for use as a grease trap.
    • Is delivered pre-assembled for ease of installation

    * Details shown are NH-specific; for details of other states’ specifications.

    You may also be interested in these popular precast concrete septic tanks.

    1000 Gallon Septic Tank Dimensions & Details
    Tank dimensions8’ x 5’8” x 5’2”
    Number of bedrooms supportedFormerly 2
    Now used as a pump station, holding tank, or adding to an existing system
    Pre-assembledYes
    Ideal for high water tableNo, but our 1000 gallon monolithic septic tank is.
    Average retail cost$1137.50
    Number of covers (lids)2
    Can come in traffic rated (H20) capacityYes
    Concrete strength5,000 PSI
    What are its gallons per vertical inch21
    Weight8,600 lbs.
    Fiber re-enforcedYes
    Number of inlets boots (Up to schedule 40 pipe can slide through)3
    Height of inlet from bottom of tank to bottom of pipe51”
    Number of outlets boots (Up to schedule 40 pipe can slide through)3
    Height of outlet from bottom of tank to bottom of pipe48”
    Required height of inlet baffle (20% of liquid level)9”
    Required height of outlet baffle (40% of liquid level)18”

    Frequently Asked Questions

    How much does a 1000 gallon concrete septic tank cost?

    Answer:  The average retail cost for a 1000 gallon concrete septic tank is $1062.50.

    What is the most common septic tank size?

    Answer: Nationwide it is a 1000 gallon septic tank, but in New Hampshire it is rarely used as a septic tank.  When the Department of Subsurface (DES) revised the state rules in 2012 it pretty much made it obsolete as a specified tank size in NH.  They are now used as a pump station, holding tank, or adding capacity to an existing septic system.

    Is it ideal for high water table properties?

    Answer: For properties with high water tables, a monolithic septic tank with at the very top of the septic tank is the most appropriate type.  Our 1000 gallon septic tanks are available in both mid-seam and monolithic models.

    How much does a 1000 gallon concrete septic tank weigh?

    Answer: Our 1000 gallon tanks weigh approximately 8,600 lbs.  Weight varies slightly among precast manufacturers depending on the dimensions, wall thickness, floor & top thickness and rebar reinforcement.

    How deep is a 1000 gallon septic tank?

    A 1,000 gallon concrete septic tank is typically 4' 8" deep.

    How many bedrooms does a 1000 gallon septic tank support?

    Answer:  In New Hampshire it use to be several, then two, and now a 1250 gallon septic tank is the minimum requirement for new houses with 3-4 bedrooms.  A 1000 gallon tank is now used as a holding tank or pump station in NH, or adding capacity to an existing septic design.  It can be used for houses with 1-2 bedrooms, but rarely is.

    Can you drive over a 1000 gallon septic tank?

    It depends on the tank’s design rating.  We manufacture in three variations: H-10 is for pedestrian traffic with 300 lbs. of live load per square foot plus 3’ of burial depth.  HD is for burial depth up to 5’.  H-20 is for drive over traffic and up to 6’ of burial depth.

    1000 gallon concrete septic tank drawing.

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