What applications and base metals is the Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934 suitable for?

Soldering flux is suitable for copper-to-copper and copper-to-brass plumbing joints. Verify the flux meets ASTM B813 or equivalent standard for potable water plumbing work, as required by most plumbing codes. Harris Bridgit flux is NSF-listed for use on copper potable water systems.

How do I remove flux residue after using the Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934?

All flux residue must be removed after completing the joint. For brazing and soldering, clean flux residue with warm water and a stiff brush immediately after the joint cools — flux becomes harder to remove as it ages. For SAW welding, remove slag and flux residue with a chipping hammer and wire brush between passes and after final welding. Confirm complete flux removal, especially in pressure vessel, pipe, and food-grade applications where residue can cause corrosion or contamination.

How should I store the Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934?

Store flux in a sealed container in a cool, dry location. Moisture contamination degrades paste and powder fluxes — activated flux or flux that has absorbed moisture should be discarded and not used, as it can cause porosity or incomplete flux activation during the joining operation. Keep containers sealed between uses.

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Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934

Q: What is the Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934 used for?

The Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934 is a soldering flux used to clean metal oxide from copper and brass surfaces before soldering, promoting solder wetting and capillary flow into the joint. Apply flux with a brush to all surfaces that solder will contact before assembling and heating the joint. Always clean flux residue from completed joints — soldering flux is mildly corrosive and will cause discoloration or long-term joint degradation if left in place.

Q: How do I apply the Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934 correctly?

Apply flux using an appropriate method for the process: brush application for soldering and brazing fluxes (cover all joint surfaces evenly), pre-placed granular flux feeding for SAW welding. Flux quantity matters — too little flux leaves bare areas that oxidize; too much flux can be difficult to remove after welding or brazing. Apply a thin, even coat to all contact surfaces.

SKU: 331934

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Harris® Water-Soluble Plumbing Soldering Flux 12 ea. 1/2 lb. jar

Overview

Harris Water-Soluble Soldering Flux - Half Pound Jar - (12 Pack) - 331934

Lead-free water flushable plumbing flux paste that holds its shape and will not slump. A water-soluble alternative to petroleum-based plumbing fluxes. Begins cleaning metals at room temperature. It provides excellent solderability with any lead-free solder. It aids in the removal of oxides and impurities. Helps draw solder into joints to provide better adhesion of alloy to pipe. Easy clean-up with water after soldering. Complies with the EU Reach & RoHS directive.

Features

Cleans and removes surface and metal oxides before soldering
Solder improves adhesion between alloy and pipe
Excellent performance with any lead-free solder
Flux cleans easily with water after soldering
Soldering temperature range of 200◦F - 700◦F (93◦C - 371◦C)
Meets ASTM B-813 specifications
Meets NSF/ANSI Standard 61 for drinking water system components - health effects
Complies with the EU Reach & RoHS directive

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