Sight Glass Accessories

Sight glass cutters, washers (EPDM and friction), guard rods, and valve sets are all available.

View the chart below for a list of sight glass accessories we supply. Scroll down for pictures and info.

Please contact us for price and availability.

Available Sight Glass Accessories

Wheeler-Rex Cutter

Sight Glass Cutters

Sight glass cutters (also called “gauge glass cutters”) are used to trim pieces of tubular sight glass. Although Keystone does supply trimmed lengths of glass, if you frequently need various sizes of sight glass, purchasing your own cutter can be a good option. 

Contact us for pricing and stock checks. See the chart below for more information on models available. 

Valve Sets

Liquid level gauge valve sets come in a variety of sizes, materials, and features. The most common sets are either 1/2″ threaded connections with 5/8″ O.D. Glass, or 3/4″ threaded connections with 3/4″ O.D. Glass.

Contact us for pricing and stock checks. See the chart below for more information on models available. 

Valve Sets
Guard Rods

Guard Rods

Most gauge glass valve sets require either 2 or 4 guard rods which help protect against side impact and also help keep the valves aligned over the glass distance. Guard rods are made of either copper or stainless steel and can be cut to length for your specific needs.

Contact us for pricing and stock checks. See the chart below for more information on models available. 

Washers

In order to make sure that you have the best possible seal, we recommend changing your gauge glass friction and compression washers when you change your glass tubing. Washers come in a variety of dimensions and materials depending on the valves they’re going into and other application factors.

Contact us for pricing and stock checks. See the chart below for more information on models available. 

Washers

Contact Us

Do you still have questions? Are you looking for pricing information or to place an order?

Do you have questions about Sight Glass Accessories?

While we mostly stock tubular glass cutters like the one shown, other versions are available and we are happy to quote them.

Usually we see guard rods cut to roughly 2 inches longer than the valve center-to-center distance, but this number can vary by valve set

Friction washers tend to be metal and fit between the compression washer and the holding nut on the gauge valve to let the nut turn without snagging anything. Compression washers are made of a compressible material and create a snug seal around the glass to prevent leakage.

Friction washers tend to come in either brass or stainless steel. Compression washers can be found in EPDM, BUNA-N, Teflon, Viton, Graphite, and others.