NGWA CPI
NGWA Certified Pump Installer (CPI)
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Cheat sheet
Keep the key ideas within reach.
ExploreKey terms
Get comfortable with the vocabulary.
ExploreStudy plan
Give each week a clear focus.
ExploreCommon mistakes
Understand the traps and how to avoid them.
ExploreCase studies
Put your knowledge to work in context.
ExploreExam-day guide
Prepare for the day ahead.
ExploreAbout this exam
The Certified Pump Installer (CPI) credential is administered by the National Ground Water Association (NGWA), a groundwater industry association whose certification programs sit under its "Advance Your Career" section alongside contractor certification, the Geothermal Driller (CVCLD) credential, certification FAQs, and a public directory of NGWA certified professionals. The CPI is intended for the tradespeople who install, service, and troubleshoot water well pumping equipment - the people who set pumps, size and connect drop pipe and wiring, and commission the system so it delivers water reliably. Because NGWA publishes a directory of certified professionals, the credential also functions as a business signal that a contractor's pump work has been independently recognized.
This study page organizes preparation around four working areas: pump systems and installation; water wells and groundwater fundamentals; electrical and controls for pumping equipment; and regulations, safety, and business practice. The domain list here is a draft pending an official outline, so treat the weightings as a study guide rather than a published blueprint, and confirm the current content outline with NGWA before you schedule.
Preparation should combine hands-on field review with the association's own learning resources: NGWA maintains a Learning Center, a bookstore, Best Suggested Practices and information briefs in its Industry Resource Library, and certification FAQs. Verify exam format, timing, fees, retake rules, and recertification intervals directly with NGWA, since this page does not publish those values.
What you'll study
About NGWA CPI preparation
Is this page an official NGWA study guide?
No. This is independent preparation material and is not affiliated with or endorsed by NGWA. The association's own Learning Center, bookstore, certification FAQs, and Best Suggested Practices documents are the authoritative sources for exam logistics and content scope. Use this page to organize your study, then confirm every administrative detail with NGWA before registering.
What does the CPI exam actually test?
Expect four areas: pump systems and installation; water wells and groundwater fundamentals; electrical and controls for pumping equipment; and regulations, safety, and business practice. The weightings shown here are a draft pending an official outline, so verify the current published domain list and percentages with NGWA rather than assuming equal quarters.
How long is the exam and what does it cost?
Those values are not published on the sources this page was built from, so we do not state them. Question count, time limit, passing score, fee, retake policy, and recertification interval should all be taken directly from NGWA's certification pages or confirmed with association staff. Treat any figure you see elsewhere as unverified until NGWA confirms it.
How difficult is it for a working pump installer?
Experienced installers usually find the field and installation material familiar and the electrical and code material harder, because it rewards precise terminology over habit. The exam is a credentialing test, not a trick quiz: the risk is assuming your local practice is universal. Study the standards and definitions behind what you already do correctly.
What is the most common way candidates lose points?
Answering from local habit instead of the standard. Pump setting depth, wire sizing, control settings, and well construction details vary by region and by state code, but the exam asks for the general principle. Read each stem literally, note whether it asks for the safest action or the most accurate value, and avoid importing one jurisdiction's rule into a general question.
In what order should I study the four domains?
Start with groundwater and well fundamentals, because pump selection, setting depth, and system troubleshooting all depend on them. Move to pump systems and installation, then electrical and controls, which is where most candidates need the most repetition. Finish with regulations, safety, and business practice, and review that domain last so the compliance details stay fresh.
How should I prepare for the electrical and controls portion?
Review motor and control fundamentals rather than memorizing one panel brand: circuit protection, conductor sizing, grounding, starting methods, pressure and level controls, and safe lockout practice. Be able to explain why a component is sized as it is. Practical troubleshooting experience helps, but translate it into general principles you can defend in writing.
Does certification replace a state license?
No. NGWA maintains a separate Contractor State Licensing and Exams resource precisely because state licensing requirements are distinct from association certification. Check your state's requirements independently. Holding a CPI credential does not by itself authorize contracting work where a state license, registration, or bonding is required.
Do I need to be an NGWA member to sit the exam?
Membership eligibility and any member discount are administrative details not established by the sources used here. NGWA's site separates membership from certification and publishes a certification FAQs page, which is the right place to confirm eligibility, application steps, and whether membership affects fees or scheduling. Ask before you pay for membership purely for exam purposes.
How do I keep the credential once I have it?
NGWA maintains a dedicated page on maintaining contractor certification, and continuing education is typically part of that picture. The specific interval, required hours, and accepted activities are not stated in the sources used here, so obtain the current requirements from NGWA before your renewal window opens rather than relying on a remembered figure.