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Technical Data Sheet
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82-1721 — DRAINAGE UNIT,EXTERNAL

✓ Government record, cited
— · GATE VALVE
PRODUCT OVERVIEW

82-1721: DRAINAGE UNIT,EXTERNAL.

The DRAINAGE UNIT,EXTERNAL is a the manufacturer industrial component. Key specifications include part_name_assigned_by_controlling_agency: DRAINAGE UNIT EXTERNAL W/O VENTRICULAR CATHETER STER CLOSED SYS. This part is cataloged in the U.S.

Government catalog under NSN 4810-01-123-6861, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
82-1721
NSN: 4810-01-123-6861
NIINs: 011236861, 014662648
FSC: 4810 — Valves, Powered
CAGE: 55031 — RONALD VELLI, LLC DBA MULTIMATIC (USA)
SPECIFICATIONS
part_name_assigned_by_controlling_agencyDRAINAGE UNIT EXTERNAL W/O VENTRICULAR CATHETER STER CLOSED SYS
NSN4810-01-123-6861
COMPONENT DIAGRAM
GATE VALVE — FULL OPEN OR FULL CLOSE ONLY Rising STEM BONNET FLOW → → FLOW SEATS — — SIZE: — · — · — PN: 82-1721 · OEM ⚠ VERIFY BEFORE ORDERING Gate valves = FULL OPEN or FULL CLOSE only — never throttle. Partial opening causes seat erosion and vibration. ✓ BROKER TIP Rising stem shows valve position visually — easier maintenance. Non-rising stem saves headroom. PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
INLET RELATIONSHIP WITH OUTLET: IDENTICAL
•
STEM TYPE: RISING
•
CONNECTION TYPE: THREADED INTERNAL PIPE
•
BONNET TYPE: PACKING RETAINING
•
NOMINAL THREAD SIZE: 1.000 INCHES IN
•
MATERIAL: COPPER ALLOY BODY
•
THREAD SERIES DESIGNATOR: NPT
•
VALVE OPERATION METHOD: AUTOMATIC
TECHNICAL CHARACTERISTICS
INLET RELATIONSHIP WITH OUTLETIDENTICAL
STEM TYPERISING
CONNECTION TYPETHREADED INTERNAL PIPE
BONNET TYPEPACKING RETAINING
NOMINAL THREAD SIZE1.000 INCHES IN
MATERIALCOPPER ALLOY BODY
THREAD SERIES DESIGNATORNPT
VALVE OPERATION METHODAUTOMATIC
SUBSTITUTES & CROSS-REFERENCES 3
255-216Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
82-711Reference document
Same NSN cross-reference
Reference document — Secondary reference
82-701Reference document
Same NSN cross-reference
Reference document — Secondary reference
LIFECYCLE
NSN statusCancelled· U.S. Government catalog
Acquisition advice: Normally procured from the manufacturer (OEM)No demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is 82-1721?
82-1721 is a DRAINAGE UNIT,EXTERNAL.
What parts can replace 82-1721?
There are 3 known substitutes for 82-1721: 255-216, 82-711, 82-701. Substitute compatibility should be verified for your specific system.
What is the NSN for 82-1721?
82-1721 is cataloged in the U.S. Government catalog under NSN 4810-01-123-6861. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.