CA C-42 — Sanitation System Exam
CA · CSLB Exam
Updated 2026- Everything you need to pass your exam
- Practice with hundreds of exam questions for 0 surprises on test day
- Quickly learn why you missed any question
- Free sample below - know what you're getting
- Made to be used on your phone
Pass your exam, or it's free.
What's covered - 5 topics per exam
115 questions and answers per exam set - Exactly like your real CSLB contractor exam.
- Planning and Estimating 27%
- New Septic System Installation 26%
- Sewer Lateral Installation and Repair 10%
- Septic System Maintenance and Repair 10%
- Safety 27%
See how you learn
Safety
Common Questions
Is this updated for 2026?
Yes. All questions, code references, and study materials were last given a major update for the 2026 CSLB standards.
How long do I get access?
Enough time to take your exam 49 times — though most of our users pass on their first try! You get a full year of access for individual pass kits, or 1-year access to everything if you grab the All Licenses bundle.
What if I don't pass the exam?
Pass on your first try or it's free. We offer a no-BS, 1-click refund guarantee. If you don't pass, you get your money back instantly. View our refund policy here.
Do I need a textbook too?
Nope — we read the dense code books so you don't have to. Just grab your phone and an internet connection. That is everything you need.
How exactly do I access the course after I buy?
Instant access. As soon as you check out, you'll be dropped straight into our guided exam platform. Bookmark this page and study from anywhere, on any device, and pick up right where you left off. Sign in to access your courses.
