Moderately feasible for experienced DIYers with a strong understanding of plumbing, electrical work, and local code requirements. However, professional installation is highly recommended to ensure compliance, proper system sizing, reliable operation, and warranty validity. Permits are always required.
Installation requires adherence to both plumbing and electrical codes. Proper sizing, discharge, and reliable power ensure flood protection. Professional installation is often recommended.
Project Guidelines & Rules
Permitting & General Requirements
5 Rules
Permit Requirement
A building permit is required from your local building department prior to commencement of work involving new installations or significant alterations of sump pump systems. Contact your local municipality for specific application procedures and fees. (2024 IRC R105.1, Local Ordinances)
Sump Pit Location
The sump pit shall be located at the lowest practical point of the basement or crawl space floor to effectively collect groundwater. (Implied by Illinois Plumbing Code 890.1130(a))
Accessibility
All sump pumps and pits shall be readily accessible for inspection, maintenance, and repair without requiring removal of permanent construction. (General Building Practice)
Protection from Freezing
Any portion of the sump pump discharge piping exposed to freezing temperatures must be protected to prevent ice buildup that could impede discharge. This is critical given DuPage County's climate. (Illinois Plumbing Code 890.1130(d))
Radon Mitigation Consideration
If a radon mitigation system is present or required, the sump pit cover must be airtight and sealed to prevent radon gas entry into the living space. (2024 IRC Appendix F, Local Environmental Standards)
Sump Pit & Discharge Plumbing
7 Rules
Sump Pit Dimensions
Sump pits shall be a minimum of 18 inches in diameter and 24 inches in depth. (Illinois Plumbing Code 890.1130(b))
Sump Pit Construction
Sump pits shall be constructed of durable, corrosion-resistant material and provided with a sturdy, removable cover. (Illinois Plumbing Code 890.1130(b))
Discharge Pipe Sizing
The sump pump discharge pipe shall be a minimum of 1-1/2 inches in nominal diameter. (Illinois Plumbing Code 890.1130(b))
Check Valve Requirement
An approved check valve shall be installed on the discharge line to prevent the backflow of water into the sump pit when the pump cycles off. (Illinois Plumbing Code 890.1130(b))
Prohibited Connections
Sump pump discharge shall not be directly connected to the building's sanitary drainage system or interior storm drainage system. (Illinois Plumbing Code 890.1130(c))
Exterior Discharge Termination
Discharge shall terminate above grade, at least 6 feet horizontally from the building foundation, and directed away from the building and adjacent properties to prevent re-entry of water into the building or damage to neighboring properties. Local zoning ordinances may specify additional setbacks. The termination point must be free from obstruction. (Illinois Plumbing Code 890.1130(d), 2024 IRC R401.3)
Battery Backup Pump Discharge
The discharge for the battery backup pump may join the primary pump's discharge line above its check valve, or utilize a separate, dedicated discharge line that meets all the requirements for the primary discharge. (General Plumbing Practice, Implied by Illinois Plumbing Code 890.1130)
Electrical Installation
5 Rules
Dedicated Circuit
The primary sump pump shall be supplied by a dedicated 120-volt branch circuit, ensuring reliable power and preventing overload issues. (2023 NEC 210.23(A), 210.21(B)(1))
GFCI Protection
All 120-volt, 15- and 20-ampere receptacles located in basements, crawl spaces, and similar areas must be Ground-Fault Circuit-Interrupter (GFCI) protected. (2023 NEC 210.8(A)(5))
Receptacle Accessibility
The receptacle for the sump pump shall be readily accessible and located within the reach of the pump's flexible power cord, without the need for extension cords. (2023 NEC 422.16(B)(2), 110.26)
Wiring Methods
All wiring for the sump pump system shall conform to the applicable requirements of 2023 NEC Chapter 3, including proper conductor sizing, insulation, and protection. (2023 NEC 300.1)
Overcurrent Protection
Appropriately sized overcurrent protection shall be provided for the pump motor branch circuit to prevent damage from overloads or short circuits. (2023 NEC 240, 430.52)
Battery Backup System Specifics
4 Rules
Charging System Power
The battery charging system shall be connected to a 120-volt, GFCI-protected receptacle as required for basement locations. (2023 NEC 210.8(A)(5))
Battery Enclosure and Ventilation
If lead-acid batteries are used, they shall be located in a well-ventilated area to prevent the accumulation of hydrogen gas. Sealed, maintenance-free batteries are an alternative. All batteries must be securely mounted to prevent displacement. (2023 NEC 480.9, General Safety Practice)
DC Wiring Protection
DC wiring for the battery backup pump and charging system shall be protected from physical damage and comply with applicable 2023 NEC requirements for low-voltage systems or battery circuits. (2023 NEC 725, 480)
System Listing and Installation
The entire battery backup sump pump system, including the pump, charger, and any inverter/controller, shall be listed and installed in accordance with the manufacturer's instructions and applicable NEC articles. (2023 NEC 110.3(B), 705 for interconnections)
Maintenance & Best Practices for DuPage County
4 Rules
Regular System Testing
Given DuPage County's potential for heavy spring rains and rapid snowmelt, the battery backup system, including the pump, battery, and charger, shall be tested regularly (e.g., monthly or quarterly) as per manufacturer recommendations to ensure operational readiness. Testing is crucial before anticipated inclement weather.
Battery Life and Replacement
Batteries have a finite lifespan. They should be inspected for corrosion, maintained according to manufacturer guidelines (if applicable), and replaced when testing indicates reduced capacity or at the manufacturer's recommended interval (typically 3-5 years).
Sump Pit Inspection and Cleaning
The sump pit should be periodically inspected and cleared of any sediment, debris, or foreign objects that could obstruct pump operation or interfere with float switches. This is especially important in areas prone to construction runoff or fine soil.
Discharge Line Monitoring
Regularly inspect the exterior discharge line, particularly during winter months, to ensure it is not frozen, blocked, or allowing discharged water to re-enter the foundation. Ensure snow and ice do not block the discharge point.
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