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About Mainline
Mainline’s collection just keeps growing, because why stop when you’re on top? Whether it’s the latest pumps, food waste disposers, tough-as-nails sinks, slick faucets, or rugged molded wood toilet seats, Mainline brings the goods.
Its primary NAICS classification is 423720 (Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers). Mainline is one of 7,660,543 companies listed in California.
Business Contact Information
- Phone
- +1 (301) 3521022
- Website
- mainlinecollection.com
- facebook.com/mainlinecollection
- Address
- PO Box 3188, Chatsworth, California, 91313, United States
Industry & Classification
NAICS Codes
- 42Wholesale Trade
- 4237Hardware, and Plumbing and Heating Equipment and Supplies Merchant Wholesalers
- 423720Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers
SIC Codes
- 50Wholesale Trade-durable Goods
- 506Electrical Goods
- 5064Household Appliances, Electric Housewares, and Consumer Electronics Merchant Wholesalers
Company Details
- Employees
- 16 (11-20)
- Annual Revenue
- $20.8M ($10M-$25M)
Mainline: frequently asked questions
What does Mainline do?
Mainline’s collection just keeps growing, because why stop when you’re on top? Whether it’s the latest pumps, food waste disposers, tough-as-nails sinks, slick faucets, or rugged molded wood toilet seats, Mainline brings the goods.
Where is Mainline located?
Mainline is headquartered at PO Box 3188, Chatsworth, California, 91313, United States.
How many employees does Mainline have?
Mainline has about 16 employees (the 11-20 range).
What is Mainline's annual revenue?
Mainline's annual revenue is estimated at $20.8M (the $10M-$25M range).
What industry is Mainline in?
Mainline's primary NAICS code is 423720 (Plumbing and Heating Equipment and Supplies (Hydronics) Merchant Wholesalers).
How can I contact Mainline?
Its website is mainlinecollection.com and its phone number is +1 (301) 3521022.
Largest companies in California
Largest companies on Factur
Manufacturing sales in California, 2026
In California, Factur's 2026 study counted 98 manufacturing quotes worth $14.7M and 18 purchase orders over 12 months: 18% of quotes became orders, against 21% nationally. See the California data.
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