Stopcocks

Stopcocks work as valves, serving to regulate, interrupt, or completely stop gas or liquid flow through piping, tubing, or a faucet, with tubes attached to the stopcock’s female joint, easily separated or connected by a turn of the stopcock. Stopcocks may be held in place by vacuum, rubber rings, or clips. Glass stopcocks need stopcock grease for lubricating and sealing the plug and shell. Glass stopcocks with plastic plugs are sealed without grease but are less effective for high vacuum. Plastic plug glass stopcocks, however, work well for low vacuum applications.

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Product	Brand	Type	Material	Size
Replacement Stopcocks	—	3-way Stopcock	Polypropylene	Each
Straight Bore Glass Stopcock	—	Straight Bore Stopcock	Borosilicate Glass	Each
Oblique Bore Hollow Plug High Vacuum Stopcock	—	Oblique, Hollow, High Vacuum	Borosilicate Glass	Each
Double Oblique Bore PTFE Stopcocks	—	Double Oblique Stopcock	Borosilicate Glass	Each

Replacement Stopcocks

Polypropylene body has Teflon™ PTFE plug, washer and bright red handle

Straight Bore Glass Stopcock Fisherbrand

Plugs and barrels are ground to be interchangable.

Oblique Bore Hollow Plug High Vacuum Stopcock Fisherbrand

Stem OD: 10 or 16 mm, with hollow plug, Precision ground with corresponding numbers on the barrel and the plug.

Double Oblique Bore PTFE Stopcocks Fisherbrand

Double Oblique Bore Stopcocks have diagonal, parallel bores to allow connection of single stem to both stems on the opposite side.