# Core Plumbing

_Company profile on San Diego Water Heater Guide — verified 2026-06-10._

Core Plumbing is a family-owned, residential-focused San Diego company whose CSLB record matches its site exactly — Wayne Calvin Enterprises Inc dba Core Plumbing, C-36 active. It is one of the few companies here that publishes typical water heater cost ranges on its homepage: roughly $900–$2,000+ for a tank install and $1,500–$4,500+ for tankless. Coverage spans about 40 communities across the county. No founding year is published.

## At a glance

- **Location:** San Diego, CA
- **CSLB license:** #866264 C-36 (CSLB-verified)
- **24/7 availability:** Yes — company-published “Mon–Sun: 24 Hours”; confirm dispatch vs. answering
- **Same-day service:** —
- **Financing:** Yes
- **Website:** https://coreplumbingsd.com
- **Phone:** (858) 538-6025
- **Pricing:** Publishes educational cost ranges: tank install ~$900–$2,000+, tankless ~$1,500–$4,500+, repairs ~$150–$900+ (not binding quotes)
- **Service areas:** San Diego, Clairemont, Kearny Mesa, La Jolla, Pacific Beach, Point Loma, Chula Vista, El Cajon, La Mesa, Carlsbad, Encinitas, Escondido, Poway, Coronado

## Observed strengths

- CSLB license #866264 (C-36) verified active; licensed entity, address, and phone match the site exactly
- Publishes typical tank and tankless install price ranges on the homepage — unusual for the market
- Family-owned, residential service focus with a ~40-community published service area

## Ask before hiring

- No founding year is published — ask how long it has operated under current ownership
- Confirm whether “Mon–Sun 24 hours” is staffed dispatch or an answering service
- No written warranty terms published — ask what workmanship warranty applies to installs

## Sources we checked

- [Core Plumbing homepage (services, 24-hour claim, published price ranges, service areas)](https://coreplumbingsd.com/) — checked 2026-06-10
- [About page (family-owned, residential focus)](https://coreplumbingsd.com/about/) — checked 2026-06-10
- [CSLB license detail #866264 (Wayne Calvin Enterprises Inc dba Core Plumbing, C-36, active)](https://www.cslb.ca.gov/onlineservices/checklicenseII/LicenseDetail.aspx?LicNum=866264) — checked 2026-06-10

Canonical page: https://www.sandiegowaterheater.com/company/core-plumbing/

## Machine-readable index

- Site index for LLMs: https://www.sandiegowaterheater.com/llms.txt
- EntityMap v1.0 (entities + sourced evidence): https://www.sandiegowaterheater.com/entitymap.json
- Agent instructions (when to use this guide): https://www.sandiegowaterheater.com/agents.md
- XML sitemap: https://www.sandiegowaterheater.com/sitemap-index.xml

_Our editorial rankings follow our published methodology. Companies cannot pay to change their editorial ranking. Some companies may pay for enhanced profiles or clearly labeled sponsored directory placements; sponsorship never affects editorial rank._

_Published by San Diego Water Heater Guide. Guide last updated June 2026._