WestAir Gases & Equipment

What WestAir Gases & Equipment does

WestAir Gases & Equipment is a family-owned industrial gas distributor founded in 1970 as San Diego Welders Supply and rebranded to WestAir in 2000. Headquartered in San Diego, California, the company distributes industrial, medical, and specialty gases (including nitrogen, oxygen, argon, hydrogen, helium, carbon dioxide, acetylene, and custom blends such as EPA Protocol and laser gases) alongside welding equipment and cryogenic accessories, serving customers across California and Arizona through 19+ retail and warehouse locations. Its customer base spans biotechnology and life sciences, government and municipalities, manufacturing and metal fabrication, food and beverage, healthcare, clean energy, and hospitality — with named enterprise accounts including Illumina, Eli Lilly, San Diego Zoo Wildlife Alliance, Taylor Farms, and the City of Pasadena.

The company operates a vertically integrated distribution model built on three product layers: commodity gas in cylinder, microbulk, and bulk formats; complementary equipment (Lincoln Electric, Miller, Hypertherm, ESAB welding lines, plus cryogenic and specialty gas hardware); and value-added services such as Telemetry tank monitoring with predictive usage analytics, Accurate Cylinder Management (ACM), EPA Protocol Gas blending in an ISO/IEC 17025:2017 accredited lab, Hydrogen Services for transit and Class 8 fleet fueling, Process Piping Design and Installation, and Eco-CO2 recovery. Revenue is generated through a mix of one-time packaged gas and equipment sales, usage-based bulk delivery, recurring cylinder and bulk tank rentals (monthly or daily), and professional services for specialty gas blending and system installation. Pricing is quote-based with invoicing available for business accounts.

WestAir's go-to-market combines enterprise field sales (pursuing large biotech, life sciences, and government contracts with dedicated account management and 24/7 service), inside sales for SMB and recurring accounts, and direct-to-consumer walk-in retail across its branch network, with e-commerce ordering available online. A sole-source $750,000 three-year contract awarded by Pasadena City Council in February 2026 illustrates the company's ability to win regulated municipal work, while its May 2025 Milpitas facility opening signals continued geographic expansion into the Bay Area/Silicon Valley biotech corridor. The business remains under three generations of Castiglione family ownership with no external investment or parent company.

Name

WestAir Gases & Equipment

Legal name

WestAir Gases & Equipment, Inc.

Website

https://westairgases.com

Company type

Private

Founded year

1970

Operating status

Operating

Headcount range

251–500 employees

Short description

WestAir Gases & Equipment is a family-owned industrial gas distributor founded in 1970, distributing industrial, medical, and specialty gases alongside welding equipment across 19+ locations in California and Arizona, serving biotech, government, manufacturing, food and beverage, and healthcare customers.

Ownership category

akta.pro rank

Product category

Industrial Gas Distribution

NAICS

Industrial Gas Manufacturing (32512)

akta.pro primary industry

Gas Handling Equipment & Storage (Cylinders/Tanks/Valves) (IMAEACAL)

akta.pro secondary industries

Air Separation (Oxygen/Nitrogen/Argon) (IMAEACAA), Medical & Healthcare Gases (IMAEACAF), Food & Beverage Gases (Carbonation/Freezing/Packaging) (IMAEACAI)

Keywords

• Industrial gas distribution
• Specialty gas supply
• Welding equipment supplies
• Cryogenic gas services
• Medical gas distribution

Headquarters

HQ city

San Diego

HQ country

United States

HQ region

North America

Offices20 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Supply Chain, Operations, Personnel, Infrastructure, Marketing or Sales, Technology or R&D

Revenue model

1. Packaged Gas Sales: Sale of industrial, medical, and specialty gases in cylinders and packaged formats. Includes gases such as nitrogen, oxygen, argon, carbon dioxide, helium, hydrogen, acetylene, and specialty gas blends.
2. Bulk Gas Delivery: Microbulk and bulk gas delivery services for customers with larger consumption needs. Includes liquid nitrogen and other cryogenic gases.
3. Equipment and Supplies Sales: Sale of welding equipment, supplies, PPE, safety products, cutting tools, and gas equipment including specialty gas equipment and cryogenic accessories.
4. Process Piping and Installation Services: Process piping design and equipment installation services for gas systems.
5. Cylinder Rental: Cylinders and bulk tanks are rented to customers on either a monthly or daily basis. Liquid cylinders and portable tanks are charged at current monthly rental charges.
6. EPA Protocol and Specialty Gas Services: Specialized gas mixtures blended to exact specifications including EPA protocol gases, hydrocarbon blends, laser gases for semiconductor and research applications.

Pricing tiers

Go-to-market motion3 records

Distribution channels5 records

Marketing channels8 records

Core offering

WestAir Gases & Equipment is a family-owned industrial gas and equipment distributor that sells compressed industrial, medical, and specialty gases (acetylene, argon, nitrogen, oxygen, hydrogen, helium, carbon dioxide, EPA protocol blends, custom mixtures), welding equipment and supplies, and cryogenic accessories through 19+ retail and distribution locations in California and Arizona. The company complements its gas and equipment portfolio with services including telemetry tank monitoring, cylinder tracking, process piping design and installation, specialty gas blending in an ISO/IEC 17025:2017 accredited lab, hydrogen and nitrogen services, propane supply, and same-day emergency delivery.

Product overview

WestAir Gases & Equipment is a family-owned industrial gas distributor founded in 1970, offering a portfolio of industrial, medical, and specialty gases (acetylene, argon, nitrogen, oxygen, hydrogen, helium, CO2, specialty blends) alongside complementary equipment and services. The core product is gas distribution in cylinder, microbulk, and bulk formats, supported by telemetry tank monitoring for real-time inventory management and predictive usage analytics. Key service offerings include Accurate Cylinder Management (cylinder tracking), Eco-CO2 (sustainable CO2 recovery), Hydrogen Services (mobile fueling solutions), Nitrogen Services (purging/blanketing), EPA Protocol Gases (accredited lab testing), Process Piping Design & Installation, and Propane Services. The company also distributes welding equipment (Lincoln Electric, Miller, Hypertherm, ESAB) and operates an e-commerce platform for online ordering and account management. Services are delivered through 19+ retail locations across California and Arizona.

Differentiator

Problem solved

Functional benefit

Products and services

• Industrial, Medical & Specialty Gases Comprehensive portfolio of compressed gases supplied to manufacturers, healthcare, food and beverage, biotech, government, and research customers, including industrial gases (acetylene, argon, nitrogen, oxygen, hydrogen, helium, butane, propane), medical gases, and specialty gas blends (EPA protocol gases, hydrocarbon blends, laser gases, multi-component mixtures).
• Telemetry Tank Monitoring Real-time gas inventory monitoring service with mobile alerts, predictive usage analytics, and an online dashboard that lets enterprise customers track tank levels, avoid runouts, and trigger automatic replenishment deliveries.
• Accurate Cylinder Management (ACM) Cylinder tracking and management service that maintains visibility of cylinder locations and usage so customers only pay rental on cylinders in their possession, reducing waste and unnecessary deliveries.
• Eco-CO2 Green CO2 Recovery Program Program that captures, recovers, and repurposes carbon dioxide, supplying sustainable food-grade and industrial CO2 to customers with sustainability goals.
• Hydrogen Services Comprehensive hydrogen fueling solutions including mobile hydrogen power generation support, 520 bar tube trailer deployment, and on-site controlled filling operations for transit agencies and fleet operators.
• Nitrogen Services Nitrogen purging, pressurizing, and blanketing services for industrial applications, including nitrogen pump systems and on-site nitrogen generation support.
• EPA Protocol Gases EPA Protocol gas blends produced in WestAir's ISO/IEC 17025:2017 accredited laboratory for emissions monitoring and environmental compliance testing.
• Process Piping Design & Installation Custom gas piping system design and installation services for industrial gas distribution infrastructure, supporting safe and efficient delivery of gases to customer facilities.
• Propane Services Commercial propane tank exchange, refilling, and supply services including RV propane, supported by the Garden Grove commercial propane facility and Oceanside propane location.
• Gas Safety Services Gas safety training, consultation, and support services that help customers handle, store, and use industrial gases safely and in compliance with regulations.
• Liquid Nitrogen Supply Bulk and microbulk liquid nitrogen supply for cryopreservation, cryogenic chilling, and industrial applications, including same-day emergency delivery capabilities.
• Specialty Gas Equipment Specialty gas handling equipment including regulators, valves, and distribution systems for specialty gas applications.
• Cryogenic Accessories Equipment and accessories for cryogenic gas handling, storage, and distribution including dewars and transfer systems.
• Welding Supplies & Equipment Complete welding equipment portfolio including Lincoln Electric, Miller Welding, Hypertherm plasma cutters, ESAB, and related consumables, protective gear, and abrasives distributed to metal fabrication and manufacturing customers.
• E-Commerce Ordering Platform Online ordering, inventory management, invoice access, and account management portal that lets customers reorder gases and supplies, track deliveries, and manage billing.

Quantifiable outcome

• Same-day emergency delivery available for urgent customer needs
• +2 more outcomes

Named customers10 records

Segments7 records

Ideal customer profiles5 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability2 records

Feature3 records

Partnerships

Eight partnerships are on record, tiered minor.

• San Diego Zoo Wildlife AllianceminorOthersCustomer logo displayed on website homepage as a notable client served by WestAir.
• IlluminaminorOthersCustomer logo displayed on website homepage as a notable life sciences technology customer.
• Eli Lilly and CompanyminorOthersCustomer logo displayed on website homepage as a notable pharmaceutical customer.
• Taylor FarmsminorOthersCustomer logo displayed on website homepage as a notable agriculture and food processing customer.
• Lincoln ElectricminorChannel Partner/ Reseller/ DistributorEquipment brand sold at WestAir retail locations including Fontana branch.
• Miller WeldingminorChannel Partner/ Reseller/ DistributorEquipment brand sold at WestAir retail locations including Fontana branch.
• HyperthermminorChannel Partner/ Reseller/ DistributorPlasma cutter equipment brand sold at WestAir retail locations. Special pricing available on Powermax plasma cutters.
• ESABminorChannel Partner/ Reseller/ DistributorWelding equipment brand sold at WestAir retail locations.

Scale indicators7 records

Recent moves11 records

Expansion highlights6 records

Broad incumbents

• Air Products and Chemicals: Global industrial gas major with significant US hydrogen, helium, and specialty gas operations; competes with WestAir for hydrogen fueling, electronics/life sciences specialty gas, and bulk supply contracts in California.
• Air Liquide USA: US arm of global industrial gas major Air Liquide; supplies bulk, packaged, and on-site industrial and medical gases plus specialty gas services across the same vertical set as WestAir and with materially larger scale.
• Linde plc: Global industrial gas major formed by the Praxair–Linde merger; the largest US industrial gas presence (after Praxair) and a direct competitor for WestAir's biotech, manufacturing, and clean-energy customers in California.
• Airgas (Air Liquide subsidiary): Largest US industrial gas and welding supply distributor, now an Air Liquide subsidiary, with national branch density, packaged gas, bulk gas, and specialty gas capabilities — the dominant scaled incumbent WestAir competes against at the regional level.

Regional players

• Roberts Oxygen: Mid-Atlantic regional industrial and medical gas distributor with branch network across MD, VA, NC, and DC — comparable independent multi-branch distributor model to WestAir in a non-overlapping geography.
• Rocky Mountain Air Solutions: Regional industrial gas distributor serving Colorado, Wyoming, and the Rocky Mountain region with packaged, bulk, and specialty gas offerings — comparable regional independent model to WestAir but in a non-overlapping geography.

Direct peers

• nexAir: Regional industrial gas distributor headquartered in the Mid-South that distributes gases, welding supplies, and supports customers with proprietary tracking/service technology — closely analogous business model to WestAir but in a different geography.
• Matheson Tri-Gas: A US-focused industrial, medical, and specialty gas distributor (Nippon Sanso Holdings subsidiary) operating a multi-branch distribution network with specialty gas blending and welding supply offerings — directly comparable product/customer overlap with WestAir.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks5 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/@westairgases/videos
• Facebookfacebook.com/pages/Westair-Gases-Equipment-Inc/121317737925781
• LinkedInlinkedin.com/company/westairgases
• Instagraminstagram.com/westairgases
• Xx.com/westairgases

Compliance6 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about WestAir Gases & Equipment