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SUPERIOR NO. 141 Lead Free Water Soluble Flux 
  • 2 ounce container.
  • Non-Hazardous, water-based flux.
  • Complies with ASTM and CDA specifications.
  • Formulated for lead-free alloys.


Superior No. 141 plumbing flux is a creamy, white, water flushable paste that holds its shape and will not slump until being heated above 50°C/122°F. This product was developed as a water-flushable alternative to petroleum-based plumbing fluxes, the current standard. Superior No. 141 meets ASTM Specification B-813 and complies with Copper Development Association (CDA) requirements. It is a water-based flux that promotes excellent solderability and post-solder removal with lead-free solders.


Superior No. 141 is formulated specifically for use in plumbing applications where Copper and Copper-alloy tubes are being soldered.


Superior No. 141 should be applied with a brush or a swab. The flux exhibits the best activity between 93-315°C/200-600°F. Post-solder residues are water-flushable. The following steps are recommended for optimum soldering results:

  • Remove any oil, grease, or other contaminants from the surface to be soldered.
  • Apply flux to joint by swabbing or brushing to area being soldered.
  • Preheat or air-dry area to be soldered after flux has been applied to activate the flux and yield optimum soldering characteristics and reduce or eliminate spattering.
  • Apply or feed solder wire to area being soldered.
  • Clean flux residues from soldered area using a water rinse or by wiping off with a wet cloth.
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Praise from our customers

It shipped the same day I ordered it and was at my door 3 days later. The parts went together like a dream. Everything fit exactly as it was supposed to. The video instructions made this build very easy.

Jimmy F.
Lakeland, Florida
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