CA C-4 — Boiler, Hot Water Heating & Steam Fitting Exam
C-4 License
CA · CSLB Exam
- Everything you need to pass your exam
- Practice with hundreds of exam questions for 0 surprises on test day
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- Made to be used on your phone
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What's covered
- Planning and Estimating 15%
- Boiler System Removal, Preparation, and Installation 29%
- Specialty Boiler Installation 17%
- Boiler System Maintenance, Repair, and Retrofit 22%
- Safety 17%
See how you learn
Safety
For a boiler system where piping or surfaces exceed 140 °F and are exposed to contact, how must the contractor protect employees from accidental burns?
Common Questions
Is this updated for 2026?
Yes. All questions, code references, and study materials are strictly updated to the latest 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 lifetime access if you grab the All Licenses bundle.
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. Log in from anywhere, on any device, and pick up right where you left off.
