Hydro-test Products, INC.

85 Hudson Rd, Stow, MA 01775

ACTIVELAST SEEN IN FEDERAL DATA AUG 2026 · 2 SOURCES

Operating signal within 12 months from two or more independent sources.

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Their homepage, crawled JUL 2026

What they make

All Other Miscellaneous Manufacturing339999

Hydro-Test Products manufactures industrial gas cylinder service equipment, including cylinder testing equipment, proof test pumps, pressure gauges, and calibrated cylinders. The company serves the welding, SCUBA, fire extinguisher, fire department, and oxygen refilling industries, and produces both automated and manual solutions for testing cylinders of various sizes and pressures, as well as specialized equipment for low-pressure fire extinguisher and fire hose testing.

SUMMARIZED FROM THE COMPANY’S OWN WEBSITE

Products

Made or handled here · 21

#100-508: Fire Hose Test Adapter 1 1/2"nst · #100-512: Fire Hose Test Adapter 2 1/2"nst · #110-001: Quick Coupler, 1/2"fnpt, Plated Steel · #110-002: Nipple, 1/2"mnpt, Plated Steel · #140-415-25: Dual Gauge Assy For Proof Testing · #140-415: Dual Gauge Assy For Dot Proof Testing · #140-417: Dual Gauge Assy For Dot Proof Testing · #190-024: Replacement Manual Pump For 500-026b · #190-030: AIR OPERATED PRESSURE TEST PUMP, 6000psi · #190-031: AIR OPERATED PRESSURE TEST PUMP, 10,000 psi · #190-400: Test Pump, 1000 Psi · #190-402: Test Pump,1850 Psi · #190-404: Test Pump, 1850 Psi · #190-406: Test Pump, 6100 Psi · #190-408: Test Pump, 6100 Psi · #190-410: Test Pump, 8800 Psi · #510-010: Cylinder Vise Station, Air Operated · #520-002: Valving / De-Valving Machine · #530-020-Y: CYLINDER HOT AIR DRYER, 115V-60Hz · #540-100: Cylinder Roller / Mixer / Inverter · #570-025: Halon 1211 Clean Agent Recovery System

Where these came from

21 from the company’s own website · Company website

json-ld on https://hydro-test.com/equipment/

Where it is

42.42943, -71.53223 · CENSUS TIGER

COUNTY

Middlesex County

METRO AREA

Boston-Cambridge-Newton, MA-NH

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STREET VIEW

Open street-level view — SEP 2025

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Every listed plant in Middlesex County

Also at this address

No other federal record shares this street address.

WHERE THIS RECORD COMES FROM — 2 FEDERAL SOURCES, 8 FIELDS

Every fact on this page traces to a public federal filing. The table below names which register holds this facility, whether that register proves the plant operates or only that it exists, and when each of them last saw it.

Source	Evidence	First seen	Last seen
COMPANY SITE	OPERATING	JUL 2026	AUG 2026
SAM GOV	OPERATING	MAR 2026	MAR 2026

FIELD BY FIELD — WHICH SOURCE SUPPLIED WHAT

FIELD	SOURCE	SIGNAL
ADDRESS LINE1	SAM GOV	MAR 2026
CAGE CODE	SAM GOV	MAR 2026
CITY	SAM GOV	MAR 2026
GEOM	CENSUS GEOCODER	JUL 2026
NAME	SAM GOV	MAR 2026
REGISTRATION EXPIRATION	SAM GOV	MAR 2026
STATE	SAM GOV	MAR 2026
WEBSITE	SAM GOV	MAR 2026

Status is computed from independent sources; nothing here is self-reported unless marked Claimed.

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