MUELLER Sight Glass: Sweat, Copper, 6 5/16 in Lg
The MUELLER A 18120 is a sweat connection sight glass made of copper, measuring 6 5/16 inches in length with a 4.49-inch cut-out length. This MUELLER product is designed for visual flow monitoring in copper piping…
SKU 3G-OTH-71907
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Product Description
The MUELLER A 18120 is a sweat connection sight glass made of copper, measuring 6 5/16 inches in length with a 4.49-inch cut-out length. This MUELLER product is designed for visual flow monitoring in copper piping systems.
Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.
Frequently Asked Questions
What is the MUELLER A 18120 sight glass used for?
The MUELLER A 18120 sweat connection sight glass is used for visual flow monitoring in copper piping systems. It allows operators to observe fluid movement, detect blockages, or confirm flow presence in industrial HVAC, refrigeration, or process lines. This copper sight glass is installed by sweating (soldering) into copper tubing.
What are the specifications of the MUELLER A 18120 sight glass?
The MUELLER A 18120 sight glass is made of copper, has a length of 6 5/16 inches, and a cut-out length of 4.49 inches. It uses a sweat connection for installation. The manufacturer part number is A 18120. This MUELLER product is designed for copper piping systems requiring visual flow indication.
Where to buy the MUELLER A 18120 sight glass worldwide?
3G Electric supplies the MUELLER A 18120 sight glass worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time. We source and deliver this MUELLER sweat connection sight glass to customers in any country.
How to install a MUELLER sweat connection sight glass?
To install the MUELLER A 18120 sight glass, clean the copper pipe ends and apply flux. Heat the joint evenly with a torch until solder melts and flows into the connection. Allow the joint to cool naturally. Ensure the sight glass is oriented for clear visual access. Follow standard copper sweating best practices for leak-free installation.
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3G Electric supplies MUELLER sweat connection sight glasses. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.













