Verify the license first
- Ask for the license number.Any licensed California contractor should give you their CSLB license number.
- Look it up.Search the number at cslb.ca.gov. Confirm the business name matches who you are talking to.
- Check status and classification.Make sure the license is active and the classification fits plumbing work.
- Note anything unclear.If the lookup raises questions, ask the contractor to explain before you proceed.
Before work starts
Pressure-specific questions by job
| Job | Ask this |
|---|---|
| Regulator | What were the static readings before and after, and what will the set point be? |
| Expansion tank | How was it sized, and what pre-charge will it be set to? |
| Low pressure upstairs | What did you rule out before recommending this fix? |
| Repipe | Which material, which routes, and how many openings in walls or ceilings? |
| Main water line | Trench or trenchless, and why for this slope? |
| Booster pump | Why is supply the problem, and is there a bypass if the pump stops? |
Green lights and red flags
Reassuring
- Measures pressure before recommending parts
- Explains options and tradeoffs
- Puts scope and price in writing
- Answers permit questions directly
Worth pausing
- Will not share a license number
- Pushes immediate whole-house work without readings
- Only verbal pricing
- Asks you to skip permits that apply
Final questions before you sign
- Can you write down what is and is not included?
- What happens if you open a wall and find more damaged pipe?
- Will you retest pressure when the work is done and give me the reading?
- What paperwork will I receive at the end?
Common questions
Is a handyman allowed to do plumbing work?
California has limits on what unlicensed workers can do. Check current rules at cslb.ca.gov.
Should I get more than one quote?
For larger jobs like repiping or line replacement, many homeowners compare written scopes from more than one licensed contractor.
What if the plumber says no permit is needed?
Ask why, and if you are unsure, check with the City of Fullerton's building department.
General information for Coyote Hills, not a quote or professional advice. In an emergency, call 911.