Search by keyword

Search by Catalog Number


Sign up for our Email Newsletter

Dr. Andrew's Corner

Contact Us

Dealer List

Product Finder



About Us

Trade Shows


Review Basket

Running Men
4125 Market St #10
Ventura, CA 93003
(800) 235-3333
# R3900 Series Non-Mixing StopCocks

No mixing of gases during port switching

Photo shows mounting rod installed on lower left.

The 3-way "Y" shape stopcock has a 7/8" (22mm) ID flow path.
A larger flow path is available in model R4000.
Plug rotation is a 120 degree angular turn with a positive stop.

We can fax or mail a data sheet.

Last Updated: 11 Jan 2013

Qty Product Catalog Number Price

Non-Mixing StopCock 22mm OD R3900A 477.00

Non-Mixing StopCock 1-1/8" OD x 22mm ID R3900B 477.00

Non-Mixing StopCock 1-3/8" OD R3900C 477.00