DUCO®  RED-LINE Boiler Sight Gauge Glass (5/8" OD x 9" L) for High-Pressure Steam Service 

with 2 EPDM Gaskets 

** Depending on local codes, inspectors require RED-LINE gauge glass. **

• Replace your ordinary sight glass (5/8" OD) with this Red Line sight glass for better optical effect to determine the liquid level from a distance than regular PLAIN type sight glasses. 
• You can accurately read water levels in industrial and commercial applications with outstanding thermal, chemical and hydrolytic resistance. 
• Fits to all Brands Steam Boilers, Jewelry Steamers, Return Tanks and Reservoirs.
• All DUCO® High Pressure Tubular Gauge Glasses come with Free 2 of EPDM Gaskets.
• DUCO® is USA Brand and serving steam industry for more than 20 Years.

* Buy 2 or more to get extra discount of 10% * 

RED-LINE Sight Glass Specifications:

• Borosilicate 3.3
• Fire-Polished End
• 1 Red and 2 White Lines
• OD (Outside Diameter):   5/8" (15.88 mm) ± 1/64"
• Wall Thickness:   7/64" (2.78 mm) ± 1/64"
• Length:  9"
• Steam boiler service working Pressure:

         Length (Inch)            Steam Boiler Service

       up to                            up to 425 ºF

             8                                   320

           10                                   315

           12                                   305

           14                                   295

           16                                   285

           18                                   280

           20                                   270

           24                                   255

Gasket Specifications:

• Material: Premium EPDM (holds up to 302 ºF, 150 ºC)
• I D:       5/8" (15.88 mm)
• OD:  27/32" (21.50 mm)
• TH:    11/32" (8.50 mm)

Packaging:

All glasses will be shipped in Heavy-Duty protective cardboard tube individually.

10 pcs/Box with protective molded foam if you order by incremental of 10 pcs.

Shipping:

Free, Fast & Same Day Shipping

Same Business Day Shipping for the orders paid by 12:00 pm EST (Monday-Friday).

All orders paid after 12:00 pm EST will be shipped on next business day. 

Returns:

We accept buyers' return within 30 days after receiving the item, buyers pay return shipping.

Questions?

Please contact us if you have any questions and suggestions.

*Visit our store for other sight glass models, sizes and premium Gaskets*

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