What M. A. Stewart & Sons does

M.A. Stewart & Sons Ltd. is a Canadian master distributor and private-label manufacturer of industrial valves, fittings, strainers, and automation packages, founded in 1955 in British Columbia and family-owned by the Hardy family across three generations. The company operates from four regional branch offices — Surrey, BC (headquarters); Edmonton, Alberta; Ajax, Ontario; and Dollard-des-Ormeaux, Quebec — with estimated revenue of CAD $75-100 million and a workforce of 51-100 employees. Its commercial offering combines the MAS private-label valve line (brass, bronze, carbon, low-alloy, and stainless steel ball and butterfly valves) with exclusive Canadian or North American master distribution rights to 19 international brands including KITZ, Powell, Vogt, OMB, WKM, Demco, Mueller Steam, American Valve, Beric, FCC, Moygro, KF Valves, Max-Air, Promation Engineering, RDC, Red-White TOYO, RWV, and MECH. Customers span eight process-industry verticals: water/wastewater, power & utilities, mechanical/plumbing/HVAC, oil & gas/refining, chemical/petrochemical, pulp & paper, mining, and lead-free/drinking water systems.

The company's infrastructure is anchored by over CAD $50 million of inventory across 200,000+ square feet of warehouse space, 227 searchable valve models, and a proprietary MetalTrace electronic Mill Test Report system used to manage certifications (API, ASME, MSS, NACE, NSF/ANSI 61 and 372, UL, FM, CSA, AWWA, NEMA) and CRN/QA/QC documentation across the distributed product portfolio. Manufacturing is partially internalized through a majority stake in JY Valve Mfg. Co. Ltd. (originally a 1988 50% Taiwan JV, now operating from Fuzhou, China since 2005), which produces MAS-branded valves exclusively for the group. Most recent product activity includes the December 2025 launch of a bundled Tankless Hot Water Heater Protection Kit incorporating proprietary Scale/RX scale-prevention technology.

M.A. Stewart's business model is sales-led B2B industrial distribution: revenue is generated through one-time product sales priced via custom quotation, with a field-sales organization of regional technical sales representatives supported by inside sales, regional directors, and branch managers. Products reach end users through direct specification work with consulting engineers, mechanical contractors, industrial contractors, EPCM firms, OEMs, and end users, plus wholesale distribution through plumbing and heating wholesalers across Canada. The company maintains English/French bilingual operations, a 24/7 service posture, and a trend-setting 3-year manufacturer warranty on MAS-branded products (versus 18 months on distributed partner brands). No external funding rounds have been disclosed, and ownership has remained within the Hardy family since founding.

Name

M. A. Stewart & Sons

Legal name

M. A. Stewart & Sons Ltd.

Website

https://mastewart.com

Company type

Private

Founded year

1955

Operating status

Operating

Headcount range

51–100 employees

Short description

M.A. Stewart & Sons is a Canadian master distributor and private-label manufacturer of industrial valves, fittings, and automation packages, serving process industries with exclusive distribution rights to 19 international brands from four regional branches. Founded in 1955 and family-owned, it holds CAD $50M+ inventory across 200,000+ square feet.

Ownership category

akta.pro rank

Product category

Industrial Valves and Fittings Distribution

NAICS

Metal Valve Manufacturing (33291), Other Metal Valve and Pipe Fitting Manufacturing (332919), Industrial Valve Manufacturing (332911)

SIC

Wholesale-Hardware & Plumbing & Heating Equipment & Supplies (5070), General Industrial Machinery & Equipment (3560), Pumps & Pumping Equipment (3561)

akta.pro primary industry

Valves & Cartridge Valves (Directional, Pressure, Flow Control) (IMAHAGAE)

Keywords

• Industrial valve distribution
• Pipe fittings supply
• Valve automation packages
• Master valve distributor
• Industrial flow control products

Headquarters

HQ city

Edmonton

HQ country

Canada

HQ region

North America

Offices4 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Product Sales (Valves, Fittings, Actuators): Revenue generated through direct sales of industrial valves, fittings, strainers, and automation products. The company maintains substantial inventory and provides 24/7 service for timely product delivery to customers.

Go-to-market motion3 records

Distribution channels2 records

Marketing channels4 records

Core offering

M.A. Stewart & Sons is a master distributor and manufacturer of industrial valves, fittings, strainers, and automation packages serving Canadian and international customers. The core offering combines private-label MAS branded valves (ball, butterfly, gate, globe, check, balancing) with exclusive Canadian distribution rights for 19 international valve brands including KITZ, Powell, Vogt, OMB, WKM, Demco, Mueller Steam, Red-White TOYO, and others, complemented by actuators from Max-Air, Promation Engineering, and RDC.

Product overview

M.A. Stewart & Sons is a Master Distributor and manufacturer of industrial valves, fittings, and automation packages serving the Canadian market and global customers. The core offering includes private label MAS brand valves (ball, butterfly valves in brass, bronze, carbon, low alloy and stainless steel) complemented by an extensive portfolio of 19 distributed international brands including KITZ, Red-White TOYO, Powell Valve, American Valve, Beric, DEMCO, FCC, Moygro, RWV, KF Valves, Mueller Steam, OMB, Vogt, and WKM. The company also distributes actuator products from Max-Air, Promation Engineering, and RDC. Product categories span ball valves, balancing valves, butterfly valves, check valves, gate valves, globe valves, strainers, fittings, and supply stops. Special options include NACE, API 607 Firesafe, ASME B16.34, and NSF certifications. A Custom Valve Builder tool enables customers to specify custom configurations. The company holds over CAD $50 million in inventory across 200,000+ square feet of warehouse space.

Differentiator

Problem solved

Functional benefit

Brands

• MAS: Private label brand of M.A. Stewart & Sons Ltd., including Brass, Bronze, Carbon, Low Alloy and Stainless Steel Ball and Butterfly valves with options including NACE, API 607 Firesafe, ASME B16.34, CSA, NSF certifications.

Products and services

• MAS Brand Valves Private-label MAS valves including brass, bronze, carbon, low alloy and stainless steel ball and butterfly valves with options including NACE, API 607 Firesafe, ASME B16.34, CSA, and NSF certifications.
• KITZ Valves Full range of carbon steel, stainless steel, high/low alloy, duplex, gray iron, ductile iron, bronze and brass valves with actuators in ASME class ranges of gate, globe, check, ball, trunnion, and specialty products.
• Red-White TOYO Valves Complete line of brass, bronze, iron, gate, globe, check, ball, and butterfly valves and strainers for commercial, residential, institutional, and industrial applications.
• American Valve Industry-leading 4000 and 3700 Series flanged ball valves representing over 100 years of innovation and quality in industrial valve manufacturing.
• Beric Valves Cast gate, globe, check valves, forged steel valves, and API 603 corrosion-resistant valves compliant with ISO 9001:2008 standards.
• DEMCO Butterfly Valves Cameron DEMCO butterfly valves engineered for dependable, heavy-duty performance in abrasive and corrosive service conditions for oilfield applications.
• Flow Control Components (FCC) Metal seated and resilient seated knife gate, API 603 gate, ASME globe, check, tilting disc check, and isolation valve products through ASME 600 pressure class and NPS 96.
• Moygro Check Valves Wafer-style check valves available in ASME 125, 150, and 300 pressure classes in various materials, serving industrial, fire protection, and commercial/mechanical markets.
• Red-White Valve Corporation (RWV) Tankless water heater valve kits and a comprehensive valve product line for plumbing and industrial applications.
• KF Valves Highly engineered ball valves, check valves, needle valves, isolator valves, and high-performance wellheads for fixed-pipe process plants in oil & gas, power generation, and process industries.
• Mueller Steam Specialty Pipeline strainers, check valves, and butterfly valves from a manufacturer operating an ISO 9001:2008 registered facility of over 300,000 square feet.
• Powell Valve Gate, globe, check, pressure seal, parallel slide, non-return, dual-plate check, and high-performance butterfly valves in all materials from ISO 9001 certified facilities.
• WKM High Performance Butterfly Valves Cameron WKM DynaCentric high-performance butterfly valves for high-pressure water, oil, steam, gas, and slurry applications in carbon or stainless steel.
• OMB Valves Forged steel valves for oil & gas, power, shipbuilding, and aerospace industries, specializing in high-pressure applications.
• Vogt Valves Forged steel gate, globe, angle, and check valves for chemical, petrochemical, process, and petroleum industries.
• Max-Air Actuators Pneumatic rack and pinion actuators providing solutions for complicated flow requirements including diverting and multi-port flow applications in chemical, pharmaceutical, food and beverage industries.
• MECH Malleable Iron Pipe Fittings Malleable iron pipe fittings manufactured to highest standards with UL, FM, and CRN certifications.
• Promation Engineering Actuators Industrial electric quarter-turn, linear, and spring-return actuators designed and assembled in the USA for industrial, municipal, and process installations.
• RDC Control Actuators Canadian-manufactured pneumatic and hydraulic linear valve actuators with SIL3 IEC 61508 Safety Integrity Level 3 certification for large bore, double acting, and spring return fail-safe applications.
• Industrial Pipe Fittings Threaded brass, bronze, black, and galvanized malleable iron fittings including caps, sleeves, crosses, elbows, floor flanges, reducers, nuts, nipples, plugs, tees, and unions for industrial and commercial piping.
• Industrial Strainers Y-type, simplex, and duplex strainers with multiple mesh and perforation options in stainless steel, iron, ductile iron, and carbon steel with 304 or 316 mesh.
• Tankless Hot Water Heater Protection Kit All-in-one protection kit including hot water valve, cold water valve with drain ports (threaded, solder, or press ends), PRV valve, and Scale/RX technology designed to eliminate up to 75% of scale deposits.

Quantifiable outcome

• 3-year manufacturer warranty on MAS branded products, exceeding industry standard
• +2 more outcomes

Segments8 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature1 record

Partnerships

19 partnerships are on record, tiered core.

• JY Valve Mfg. Co. Ltd. (JYMCO)coreStrategic or Co-development Partner · 1 January 198850% Joint Venture Agreement with Taiwan-based valve manufacturer established in 1988. In 2005, operations moved from Taiwan to Fuzhou, China where JY Valve manufactures exclusively MAS branded products.
• KITZcoreChannel Partner/ Reseller/ DistributorM.A. Stewart & Sons is the sole authorized Master KITZ distributor in Canada. KITZ is one of the world's leading valve manufacturers and Japan's largest, providing carbon steel, stainless steel, and specialty valves.
• Red-White TOYOcoreChannel Partner/ Reseller/ DistributorExclusive authorized Red-White TOYO valve distributor in Canada. Red-White TOYO is a leader in Canadian Plumbing, Heating and Mechanical Industry for over 60 years with complete line of brass, bronze, iron valves.
• American ValvecoreChannel Partner/ Reseller/ DistributorExclusive authorized American Valve distributor in Canada. American Valve provides dependable products including 4000 and 3700 Series flanged ball valves with over 100 years of industry presence.
• BericcoreChannel Partner/ Reseller/ DistributorExclusive authorized BERIC valve distributor in Canada. Beric-Davis Companies International entered the industrial valve market in 1998 with offices in Houston, Texas and Wuxi, China.
• Mueller SteamcoreChannel Partner/ Reseller/ DistributorExclusive authorized Mueller Steam Specialties strainer and valve distributor in Canada. Mueller is the largest global supplier of strainers with over 300,000 sq ft ISO 9001:2008 registered manufacturing space.
• DemcocoreChannel Partner/ Reseller/ DistributorSole authorized Master DEMCO Butterfly valve distributor in Canada. Cameron Demco butterfly valves are engineered for drilling and production industries with heavy-duty performance in abrasive conditions.
• Flow Control Components (FCC)coreChannel Partner/ Reseller/ DistributorExclusive authorized FCC valve distributor in North America. FCC manufactures metal seated and resilient seated knife gate valves for pulp and paper, mining, water treatment, and refinery applications.
• MoygrocoreChannel Partner/ Reseller/ DistributorNorth American exclusive distributor of MOYGRO wafer style check valves. MOYGRO has been a market acceptable brand for over 30 years serving Industrial, Fire Protection and Commercial/Mechanical industries.
• Red-White Valve Corporation (RWV)coreChannel Partner/ Reseller/ DistributorSole authorized Canadian distributor for Red-White Valve Corporation. RWV provides brass and valve products for tankless water heater applications.
• KF ValvescoreChannel Partner/ Reseller/ DistributorExclusive authorized distributor for KF Valves in Canada. KF provides high-tech valves designed for fixed-pipe process plants with over 60 years of experience in oil and gas, power generation industries.
• OMBcoreChannel Partner/ Reseller/ DistributorSole authorized Master OMB VALVE distributor in Canada. OMB Valves Group is headquartered in Italy and specializes in engineered valves for severe applications in Oil and Gas, Power, Shipbuilding and Aerospace industries.
• VogtcoreChannel Partner/ Reseller/ DistributorSole authorized Master VOGT VALVE distributor in Canada. Vogt has over 100 years of leadership in forged steel gate, globe, angle and check valves. Acquired by OMB Group in 2017.
• Powell ValvecoreChannel Partner/ Reseller/ DistributorExclusive authorized Powell Valve distributor in Canada. Since 1846, Powell has focused on 100% customer satisfaction with ISO 9001 certified facilities in Manning, South Carolina.
• Max-AircoreChannel Partner/ Reseller/ DistributorExclusive authorized Max-Air Actuators distributor. Max-Air is a leader in automation technology providing pneumatic control products including rack and pinion actuators for chemical, pharmaceutical, food and beverage industries.
• MECH (Jinan Meide Casting)coreChannel Partner/ Reseller/ DistributorStocks and distributes MECH malleable iron pipe fittings from Jinan Meide Casting Co. Ltd. MECH is one of the largest manufacturers in the malleable iron fitting industry with UL, FM, CRN certifications.
• Promation EngineeringcoreChannel Partner/ Reseller/ DistributorExclusive authorized distributor of ProMation Engineering actuators in Canada. ProMation provides industrial electric quarter turn, linear, and spring return actuators designed and assembled in the USA.
• RDC Control Ltd.coreTechnology or IntegrationCanadian manufacturer of pneumatic and hydraulic linear valve actuators with SIL3 IEC 61508 Safety Integrity Level 3 certification. Capable of supplying actuators for large bore, double acting, and spring return fail safe applications.
• WKM (Cameron)coreChannel Partner/ Reseller/ DistributorSole authorized Master WKM High Performance Butterfly valve distributor in Canada. WKM DynaCentric valves provide cost-effective solutions for high-pressure water, oil, steam, gas, and slurry applications.

Scale indicators5 records

Recent moves8 records

Expansion highlights6 records

Direct peers

• Velan Inc. Canadian-headquartered industrial valve manufacturer with global operations, producing gate, globe, check, ball, and butterfly valves for severe-service applications. Velan is the most direct comparable as a Canadian valve manufacturer competing in many of the same end-markets (power, oil & gas, chemical) that M.A. Stewart serves via its distributed brands.
• KITZ Corporation: Japan's largest valve manufacturer producing carbon steel, stainless steel, and specialty valves. KITZ is both a principal supplier to M.A. Stewart (sole Canadian distributor) and a global competitor whose products overlap with MAS private-label offerings in the same end-markets.
• Smith-Cooper International: US-based master distributor of valves, fittings, and piping products serving industrial, mechanical, and plumbing markets. Smith-Cooper's distribution-led business model with exclusive brand partnerships and broad product portfolio is highly comparable to M.A. Stewart's go-to-market approach.

Broad incumbents

• Mueller Water Products: US-listed manufacturer of water infrastructure products including valves, hydrants, and pipe fittings. Mueller is a broad incumbent overlapping with M.A. Stewart's water/wastewater segment and is also a principal partner (Mueller Steam Specialties) that M.A. Stewart distributes in Canada.
• Watts Water Technologies: US-listed global manufacturer of plumbing, flow control, and water treatment products including valves and fittings. Watts competes in M.A. Stewart's primary Mechanical/Plumbing/HVAC segment and in lead-free drinking water products with broader product breadth and international footprint.
• Flowserve Corporation: Global manufacturer of pumps, valves, seals, and flow control automation for power, oil & gas, chemical, and water industries. Flowserve competes broadly in industrial valves and is significantly larger and more globally diversified than M.A. Stewart, providing a benchmark for scale economics.
• Crane Co. Diversified industrial manufacturer with a significant Process Flow Technologies segment producing valves and fittings for chemical, energy, and general industrial markets. Crane's broader portfolio and global reach contrast with M.A. Stewart's distribution-led Canadian focus.

Regional players

• AVK Holding A/S: Danish-based global manufacturer of valves, hydrants, and accessories for water, gas, and industrial applications with established Canadian operations. AVK competes in M.A. Stewart's water/wastewater segment and overlaps in distribution-led model for European principals.
• Hayward Gordon Ltd. Canadian manufacturer of industrial mixers, pumps, and process equipment serving mining, chemical, water treatment, and power industries. Hayward Gordon is a fellow Canadian industrial process equipment specialist overlapping in vertical exposure, though focused on mixers/pumps rather than valves.

Emerging players

• Bonney Forge Corporation: US manufacturer of forged steel valves, fittings, and pipeline products for oil & gas, power, and process industries. Bonney Forge competes in similar severe-service niches where M.A. Stewart distributes Powell, OMB, and Vogt products.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/m-stewart-ltd

Compliance36 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles10 records

Subsidiaries1 record

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 M. A. Stewart & Sons