Trade Exam · Module 4
Toilet Installation
Closet flange at 12 inches rough-in and even with the floor, wax ring seal, water supply with accessible shutoff valve, and 15-inch wall clearance. California's 1.28 gpf standard, proper leveling, and ADA requirements (17-19 inch seat height) separate clean installs from callbacks.
Key Takeaways
Why This Matters on the Exam
Listen, toilet installation is bread and butter in California plumbing. You're gonna see this on the job site constantly - residential remodels, new construction, repairs. The state code is strict about rough-in dimensions, clearances, water limits, and how you connect things. I've watched guys lose money on callbacks because they got the flange height wrong or used cheap wax rings. The exam hits hard on closet flanges, wax rings, water supply, and ADA requirements. Get this right, and you've got one of the easiest installs on the job.
What You Must Know
Here's the deal: a toilet is really just three things done right. The closet flange sits from the wall to the drain center - that's your rough-in. The flange needs to be the finished floor (no more than 1/4" above). California mandates toilets can't use more than - that's been the law for years now. Water supply line is with a shutoff valve you can reach. Clearances are from the toilet center to any wall, and between two toilets. ADA units sit at the rim. You're gonna see both gravity-fed tank units and commercial flushometers, but tank-type dominates residential.
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