Duran Redline Gage Glass has a red line between two white lines, which in the presence of a colorless liquid magnifies the red line. The bold red line makes it easier to read the liquid level. Redline tubular gage glass is widely used in tanks, reservoirs, and low-pressure boiler applications.

SizePart Number
5/8" x 8-1/2" Red Line Glass851-35
5/8" x 9-1/2" Red Line Glass851-199
5/8" x 9-5/8" Red Line Glass851-135
5/8" x 9-7/8" Red Line Glass851-133
5/8" x 10" Red Line Glass851-46
5/8" x 10-1/4" Red Line Glass851-56
5/8" x 10-1/2" Red Line Glass851-34
5/8" x 10-3/4" Red Line Glass851-44
5/8" x 11-1/2" Red Line Glass851-38
5/8" x 12" Red Line Glass851-37
SizePart Number
5/8" x 36" Red Line Glass624490
5/8" x 48" Red Line Glass624510
5/8" x 60" Red Line Glass624220
5/8" x 36" Red Line Heavy Wall Glass623240
5/8" x 48" Red Line Heavy Wall Glass623260
3/4" x 36" Red Line Glass624790
3/4" x 48" Red Line Glass624810
3/4" x 60" Red Line Glass624600
3/4" x 36" Red Line Heavy Wall Glass623280
1/2" x 36" Red Line Glass622190

Don’t forget to change the
gaskets when replacing glass!

Sight Glass washers

GasketPart Number
5/8" Teflon WasherD1871-00
5/8" Rubber WasherD1600-00
5/8" Brass Friction RingE1819-00

We also have flag glass for heavy duty applications!
Call us for a custom heavy duty water gauge set.

flat glass blue