Questions and Answers for Oatey Safe Flo 8 oz. Lead-Free Silver Solder Wire

A:  420°F – 460°F melting range.

A:  I would bank on that solder lasting longer than you. If the resin is not all dried up it should work.

A:  There is no shelf-life expiration on our lead-free silver solder.

A:  We sell a solder packaged in green and white that is 50/50 Alloy of 50% Tin and 50% Lead. This red packaged one is lead free.

A:  It can be used to solder brass to copper. That being said if your valve manufacturer has a specific recommendation we would advise using what they recommend for their product.

A:  Silver solder does indeed require a higher temperature to melt. A MAPP gas torch works whereas a propane torch is marginal. The manufacturer of your brass zone valve may have included the warning because of concerns of potential damage to internal parts of the valve from the higher heat level. It is advisable to heed the warning.

A:  Yes

A:  I think this solder is for plumbing. I think you need silver solder for high pressure AC units

A:  No you should use silver hard stick for high pressure

A:  Please check with your local municipality to confirm this is an approved method for gas piping in your area. This can be used on copper pipe.

A:  I never use copper for gas installations!

A:  Yes

A:  Yes you need flux with this solder

A:  Yes you do, its usually on the same aisle

A:  Yes

A:  Yes you do need flux and a brush when using this product on copper pipe

A:  This can be used to solder copper and brass pipe and fittings together. the Question states solder paper together. Please contact technical@oatey.com with your specific application.