The Koby 4" FlushLock Vapor Extraction Locking Well Plug (FL4VE) sits flush with the well casing top — the right choice when above-grade caps are not permitted in paved areas, roadways, or below-grade manholes. Made from environmentally sustainable prime nylon in safety-orange high-visibility finish. Quad 4 Gasket Sealing System with 70 Duro BUNA-N O-rings creates an air-tight and watertight seal. Security-key actuated — no padlock to snag, snap, or rust. Clear "NO FILL TEST WELL" and triangle ID lettering for field identification. Domed dust cover shuttles liquids away from the well. Fits SCH 40 PVC. Vented extraction port allows vapor or groundwater sampling without removing the plug.

Key Features

Flush-mount profile — sits level with well casing top, frees space in below-grade manholes
Quad 4 Gasket Sealing System — 70 Duro BUNA-N O-rings for air-tight and watertight seal
Security-key actuated — no protruding padlock to snag, snap, or corrode
Safety-orange prime nylon — environmentally sustainable, no-metal construction
Domed dust cover — shuttles liquids away from the well opening
"NO FILL TEST WELL" triangle ID — clear field identification lettering
Vented extraction port — vapor or groundwater sampling without removing the plug
SCH 40 PVC — fits standard well casing

Technical Specifications

Part Number	FL4VE
Size	4"
Pipe Schedule	SCH 40
Type	FlushLock Vapor Extraction
Material	Prime nylon (environmentally sustainable)
Seal	Quad 4 Gasket System, 70 Duro BUNA-N O-rings
Color	Safety orange
Locking	Security key (FLVEK — sold separately)
ID Marking	"NO FILL TEST WELL" + triangle
Made in	USA (Clarence, NY)

Applications

Soil vapor extraction (SVE), sub-slab depressurization, active groundwater sampling through flush-mount installations, and vapor monitoring in paved or high-traffic areas.

About Koby Environmental

Koby Environmental has designed and manufactured environmental monitoring well hardware in Clarence, NY since 1989. Their Torquer, FlushLock, and EasyLock product lines are specified by environmental consultants, remediation contractors, and regulatory agencies nationwide.

Questions on sizing or bulk pricing? Call (866) 514-3684 or email us — we ship within the USA and welcome tax-exempt purchasing for qualified accounts.

4" FlushLock Locking Well Vapor Extraction Plug SCH 40