SOLDERING BASICS Although PEX and other plumbing methods can be used to connect the filter, we felt that over time the weight of the sediment filter might stress the PEX connections and risk leakage. To play it safe, we opted for traditional soldered copper pipe. Use only lead-free solder identi- fied for potable water applications.
Use fluxes intended for use with lead-free solders. Avoid using ‘self- cleaning’ fluxes. Your local hard- ware store can advise you on the proper flux.
1. Measure and mark the tube with a pencil. Remember to allow for the length of tube that fits into the fitting cup. Dry-fitting the tube and fittings before soldering will ensure the fittings are square and the runs straight.
2. Cut the tube to the measured length. The tube can be cut with a disc-type tube cutter, a hacksaw, an abrasive wheel, or with a sta- tionary or portable band saw. Be careful not to deform the tube
Pro Tip: Copper pipe must be dry for soldering. To remove standing water, insert a large tube and cap the end with your thumb. Pull out the straw, release water into a bucket, then repeat until dry.
Prep solder joints by cleaning the copper tube ends using a nylon abrasive pad.