What Hydro-Test Products does

Hydro-Test Products LLC is a privately held Massachusetts-based manufacturer, founded in 1971, that designs and builds industrial gas cylinder service equipment for high- and low-pressure applications. Its catalog spans hydrostatic water jacket volumetric test systems (manual 500-HP Series and software-driven 507-HP Series, $19,000–$30,400), automated low-pressure proof test systems (504-LP Series at $12,300), cylinder vise stations, valving machines, dryers, rollers, hydrostatic pumps, CO2 transfer pumps, clean agent recovery systems, dry chemical powder handling systems, calibrated pressure gauges, precision scales, and more than 417 replacement parts. Underlying technology is electro-mechanical: water jacket volumetric expansion measurement and proof-pressure methodologies compliant with U.S. DOT and Transport Canada specifications, with PLC control on select automated units and proprietary Hydro-Test software for pass/fail calculation, record-keeping, and report generation on the automated test platforms.

The business model combines one-time capital equipment sales with a recurring parts, service, and training annuity. Revenue streams include equipment sales, replacement parts, factory/on-site/online training ($295–$1,995), and regulatory publications ($21–$910). Go-to-market is direct-to-customer through a 24/7 e-commerce storefront, phone-based technical sales, and a leasing partnership with Health Care Equipment Funding. The company serves six primary use-case segments — industrial gas cylinder requalifiers, SCUBA service providers, fire extinguisher shops, fire departments, oxygen refillers, and welding suppliers — with a global shipping footprint and a self-reported 50+ year operating history from its Stow, Massachusetts headquarters.

Name

Hydro-Test Products

Legal name

Hydro-Test Products LLC

Website

https://hydro-test.com

Company type

Private

Founded year

1971

Operating status

Operating

Headcount range

11–50 employees

Short description

Hydro-Test Products is a privately held Massachusetts manufacturer, founded in 1971, that builds DOT/Transport Canada-compliant hydrostatic testing equipment, proof test systems, and supporting cylinder service tools for SCUBA shops, fire extinguisher services, fire departments, oxygen refillers, and welding suppliers, sold direct via e-commerce.

Ownership category

akta.pro rank

Product category

Industrial Gas Cylinder Service Equipment

NAICS

Measuring, Dispensing, and Other Pumping Equipment Manufacturing (333914), Pump and Compressor Manufacturing (33391)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Pumps & Pumping Equipment (3561)

akta.pro primary industry

Hydraulic, Pneumatic & Fluid Power Systems MRO (Cylinders, Pumps, Valves, Hoses) (TLAKAHAI)

akta.pro secondary industries

Filling & Dosing Machines (Liquid/Powder/Solid) (IMAHAOAF), Controls, Monitoring & Condition Management (for Pumps/Compressors) (IMAHANAI)

Keywords

• Hydrostatic testing equipment
• Cylinder requalification equipment
• Industrial gas cylinder service
• Fire extinguisher filling equipment
• Water jacket test systems

Headquarters

HQ city

Stow

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Equipment Sales: Sale of industrial gas cylinder testing equipment including water jacket test systems ($19,000-$30,000+), proof test equipment, CO2 transfer pumps, cylinder dryers, vise stations, valving machines, and cylinder rollers. One-time capital equipment purchases with optional financing/leasing.
2. Replacement Parts: Extensive inventory of replacement parts including O-ring seals, test adapters, pump components, water jacket seals, valves, quick couplers, and specialized components. Continual consumable/replacement demand from installed equipment base.
3. Training Services: Hazmat and operational training programs for cylinder requalification, available in on-site, online, and virtual formats. Pricing from $295 (online) to $1,995 (factory training for up to 4 people), plus mail-out training guides at $285.
4. Publications: Sales of regulatory publications including CGA pamphlets, NFPA standards, DOT regulations, and ISO standards. Prices range from $21 to $910 for pamphlet library sets.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels4 records

Core offering

Hydro-Test Products manufactures and sells industrial gas cylinder service equipment for testing, filling, and maintaining high- and low-pressure compressed gas cylinders used in welding, SCUBA, fire extinguisher service, fire departments, and oxygen refilling industries. Core products include manually operated and software-driven hydrostatic water jacket cylinder test systems, automated proof test systems, cylinder vise stations, valving/de-valving machines, dryers, rollers, CO2 transfer pumps, clean agent recovery systems, calibrated pressure gauges and cylinders, and precision scales. The company also offers a full replacement parts inventory, regulatory publications, and cylinder retester training programs in on-site, online, and virtual formats.

Product overview

Hydro-Test Products is a manufacturer of industrial gas cylinder service equipment established in 1971, offering a comprehensive portfolio of testing, filling, and maintenance equipment for compressed gas cylinders. The product line centers on hydrostatic testing systems (water jacket volumetric expansion and proof test methods), with supporting equipment including cylinder vise stations, valving/de-valving machines, dryers, rollers/tumblers, and pumps. Fire extinguisher service equipment covers dry chemical powder handling, CO2 filling, and clean agent recovery systems. The company also provides pressure gauges, calibrated cylinders, precision scales, and an extensive replacement parts inventory. Training services in on-site, online, and virtual formats cover cylinder re-qualification procedures and DOT HazMat requirements. The 507-HP Series automated water jacket systems and 504-LP proof test systems represent the core automated testing platforms, while the 500-HP Series provides manually operated alternatives.

Differentiator

Problem solved

Functional benefit

Products and services

• 500-HP Series Hydrostatic Water Jacket Cylinder Test System Manually operated water jacket cylinder test system rated for 2000-10000 psi, meeting U.S. DOT requirements with air operated test pump, stainless steel water section, and calibrated pressure gauge. Designed for hydrostatic volumetric expansion testing of industrial gas cylinders.
• 507-HP Series Software Driven Water Jacket Test System Automated water jacket cylinder test system with proprietary Hydro-Test software that calculates volumetric expansion values, records test results, and supports pass/fail criteria based on percentage expansion or REE values for carbon fiber cylinders.
• 504-LP Automated Proof Test System Automated low-pressure proof test system for hydrostatic cylinder re-qualification testing in the 200-1400 psi range, featuring Bluetooth communication protocol and Hydro-Test software for automated data input and storage.
• 510-010 Air Operated Cylinder Vise Station Air operated vise station operating on 40-60 psi shop air with unique center pull design to eliminate cylinder slippage, accepting cylinders from 3-12 inch diameter.
• 520-002 Valving/De-Valving Machine Hydraulic-driven machine for removing and inserting tapered threaded valves into industrial gas steel cylinders, offering 1000 FT Lbs of torque with adjustable torque control.
• 530-020-Y Cylinder Hot Air Dryer Forced hot air dryer with unique Y-shaped design for drying portable size cylinders in inverted position, featuring 1500 watt stainless steel heating element and six outlets for simultaneous drying.
• 510-025 Automated Cylinder Inverter-Dryer PLC-controlled automated system that completes expelling of water and drying sequence in 4 minutes, featuring padded vise jaws and accepting cylinders 4-14 inches in diameter.
• 540-100 Cylinder Roller/Mixer/Inverter Multiple cylinder roller accepting up to 4 cylinders (8-10 inch diameter x 46-58 inches tall) with pneumatic tilting, operating at 85 RPM with rubber non-marring rollers.
• 560-040A1 CO2 Recharge Pump (SC-5) Electric operated CO2 transfer pump with 3000 psi pressure design, 6-10 Lbs per minute pumping speed, 115V-1Phase-60Hz operation, engineered for contaminant-free O2 cylinder service.
• 570-025 Halon 1211 Clean Agent Recovery System Halon 1211 recovery and filling system with 2 Lbs per minute recovery rate, 99% transfer efficiency, and air driven double acting piston pump.
• 550-200 Dry Chemical Powder Handling System Dry chemical fire extinguisher powder handling system with 150 Lb hopper capacity, 1/4 Lb per second transfer rate, designed for in-shop or mobile truck use.
• 550-200-400 Dry Chemical Fire Extinguisher Powder Handling System Large capacity dry chemical powder handling system with 400 Lb hopper capacity for servicing wheeled fire extinguisher units at multiple-range pressures.
• 560-310 CO2 Automatic Shutoff Scale Assembly Automatic shutoff scale assembly for CO2 cylinder filling with 500 Lb capacity, preset fill capacities of 5-10-15-20-50 and 100 Lbs, including Model SC-5 CO2 transfer pump.
• 140-001 Calibrated Pressure Gauge (11,000 PSI) Calibrated pressure gauge with 0-11,000 psi range, Class 3A specifications (0.250% accuracy), 8.5 inch mirrored dial face, external true zero adjustment, and calibration certificate.
• 140-236 Calibrated Cylinder (7500 PSI) Steel calibrated cylinder for daily verification of water jacket test systems, calibrated at multiple pressure points from 2000 to 7500 psi with typical expansion value of 45cc per 1000 psi.
• 230-150 Electronic Bench Scale (500 Lb) Legal for trade electronic bench scale with 500 x 0.1 Lb readability, RS232 bi-directional interface, stainless steel platform, and AC adapter or battery operation.
• Replacement Parts Inventory Comprehensive inventory of more than 417 replacement parts including O-ring seals, test adapters, quick couplers, valves, pump rebuild kits, water jacket components, and cylinder vise station parts for Hydro-Test equipment maintenance.
• 393-400 On-Site Cylinder Retester Training at Hydro-Test In-person training at Hydro-Test factory in Stow, Massachusetts with classroom and hands-on training on manual or automated test systems, covering operational and required HazMat training for cylinder retesters.
• 393-460 Online HazMat Training for Cylinder Retesters Web-based cylinder re-qualification training course valid for 30 days from purchase, including function specific training, quizzes, and DOT published CDs for General Awareness and Security Awareness training.
• Regulatory Publications Regulatory and industry reference materials including CGA pamphlets, NFPA standards, DOT regulations, ISO standards, and hazmat training booklets for cylinder retesters, priced from $21 to $910 for pamphlet library sets.

Segments6 records

Ideal customer profiles6 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature6 records

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Market position

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

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 Hydro-Test Products