What solder must be used on potable water pipe installations?
The safe drinking water act banned the use of lead in solder and flux, requiring the use of lead-free solder. Many proprietary lead-free solders are available. Another commonly used lead-free filler alloy is 95% tin and 5% antimony. Non-potable water lines can use a solder of 50-50 tin-lead.
Can you use lead solder in residential plumbing?
Plumbing installed before 1930 is most likely to contain lead. Copper pipes have replaced lead pipes in most residential plumbing. However, the use of lead solder with copper pipes is widespread. Experts regard this lead solder as the major cause of lead contamination of household water in U.S. homes today.
How much lead is allowed in solder used on a potable water system?
The Safe Drinking Water Act (SDWA) has reduced the maximum allowable lead content — that is, content that is considered “lead-free” — to be a weighted average of 0.25 percent calculated across the wetted surfaces of pipes, pipe fittings, plumbing fittings, and fixtures and 0.2 percent for solder and flux.
What kind of solder is used for plumbing?
Electrical solder is commonly a 60/40 blend of lead and tin. Because of the dangers of toxic lead in drinking water, local building codes now legally require the use of lead-free plumbing solder on all potable water plumbing connections that require soldering.
How long should you run tap water before drinking it?
Let the water run from the tap before using it for drinking or cooking any time the water in a faucet has gone unused for more than six hours. The longer water resides in plumbing the more lead it may contain. Flushing the tap means running the cold water faucet for about 15-30 seconds.
Why do we use lead free solder in water lines?
For this reason, the use of lead-free solder in applications where there is a potential risk of exposure or leaching into water sources (such as from being used to join copper pipe in potable water supply lines) has largely been adopted. Some examples of lead-free solder include:
What kind of solder is used in plumbing?
Acid core solders are most often used in plumbing applications to join metal pipes or sheet metal. Rosin core solder is also fabricated with a hollow core inside the solder wire, but the flux used is a milder variety made of rosin, which is a solid form of resin derived from conifers such as pine.
How is lead solder affected by the ban?
LEAD SOLDER IS HAZARDOUS… READ THE WARNING LABEL Manufacturers, distributors, and sellers of lead plumbing materials are also affected by the lead ban. The law amended two sections of the Federal Hazardous Substances Act. 1-3
What should the temperature be for soldering metal?
Soldering differs from other metal bonding approaches such as brazing or welding in both the temperatures used to create the bond and the resulting strength of the bond. The generally accepted definition of soldering given by the American Welding Society is that soldering takes place at temperatures below 840 o F (450 o C).
What kind of solder do you use for a water supply line?
Solder is available in three types: 50 percent lead/50 percent tin; 95 percent tin-antimony/5 percent lead; and lead-free solder. Any water supply pipe should be soldered with solder that contains no more than five percent lead. If possible, use the lead-free solder.
What are the different types of solder wire?
The Military Specification QQ-S-571E defines four different types of flux: (R) Rosin, (RMA) Rosin Mildly Activated, (RA) Rosin Activated, and (AC) Non-Rosin Activated. The non-rosin flux tends to be water soluble hence its name has been replaced with (WS) for Water Soluble.
How long does it take for water supply line solder to melt?
Move the torch away and touch the solder to the pipe. It may take 2 to 3 seconds for the solder to melt. If the pipe is horizontal, apply the solder to the top of the pipe. The solder will roll around in an instant. If you have done the job right, a droplet of solder will be at the bottom of the joint.
How much solder do you need for one year of school?
This approximates to around 0.055 oz of solder per student, and 0.55 oz of solder per class. Schools usually order in bulk directly from the Wartons factory to cover a whole year. This not only saves on postage costs, but also works out cheaper when you order larger quantities. This Article Continues…
