solder joints and propane - Fiberglass RV

Thread Tools Search this Thread Display Modes
Old 08-22-2010, 01:28 PM   #1
Senior Member
Bud Kennedy's Avatar
Trailer: 1984 U-Haul / 02 Mazda pick up
Posts: 174
solder joints and propane

Someone on here said to NEVER use solder type joints on copper propane fittings. I have never heard this and am wondering why this may be true given that I have recently installed a refrigerator using a solder in "T" fitting.

Bud Kennedy is offline   Reply With Quote
Old 08-22-2010, 03:34 PM   #2
Senior Member
Mark Shaffer's Avatar
Trailer: 2004 Jayco Talon toyhauler/ 1985 Burro 13 custom.
Posts: 314
Bud, typical solder for water lines are 60% tin and 40% lead. The solder joint can crack or break if the line is disturbed. Now, if you used silver solder, that makes a stronger bond and will work better than the standard water line or plumbing solder. I have used silver solder on refrigeration lines and gas lines with no problems, but my fitting of choice is a compression type fitting where you flare the copper gas line.

Mark Shaffer is offline   Reply With Quote
Old 08-23-2010, 11:47 AM   #3
Senior Member
Trailer: 2005 13 ft Trillium Outback
Posts: 282
^ +++.
2005 Trillium Outback w/ 30" tongue extension
1989 Award 730, 30'
2003 PT Cruiser
1998 K2500 Chevy Silverado 6.5 Turbo Diesel, 4X4, ext cab, short bed
Curtis F. is offline   Reply With Quote
Old 08-23-2010, 04:27 PM   #4
Senior Member
Name: Darwin
Trailer: 2002 19 ft Scamp 19 ft 5th Wheel
Posts: 3,087
Send a message via Yahoo to Darwin Maring
I have never heard that however I do agree with Mark that if you do, use silver solder.

Mark, It is my understanding that plumbing solder should be lead free. Look at it the next time you're in Home Depot.
Darwin Maring is offline   Reply With Quote
Old 08-23-2010, 06:25 PM   #5
Senior Member
Mark Shaffer's Avatar
Trailer: 2004 Jayco Talon toyhauler/ 1985 Burro 13 custom.
Posts: 314
Tin/Lead solders, also called soft solders, are commercially available with tin concentrations between 5% and 70% by weight. The greater the tin concentration, the greater the solder’s tensile and shear strengths. At the retail level, the two most common alloys are 60/40 Tin/lead (Sn/Pb) which melts at 370 F or 188 C and 63/37 Sn/Pb used principally in electrical/electronic work. The 63/37 ratio is notable in that it is a eutectic mixture, which means:
  1. It has the lowest melting point (183 C or 361.4 F) of all the tin/lead alloys; and
  2. The melting point is truly a point — not a range.
In plumbing, a higher proportion of lead was used, commonly 50/50. This had the advantage of making the alloy solidify more slowly, so that it could be wiped over the joint to ensure watertightness, the pipes being physically fitted together before soldering. Although lead water pipes were displaced by copper when the significance of lead poisoning began to be fully appreciated, lead solder was still used until the 1980s because it was thought that the amount of lead that could leach into water from the solder was negligible from a properly soldered joint. The electrochemical couple of copper and lead promotes corrosion of the lead and tin, however tin is protected by insoluble oxide. Since even small amounts of lead have been found detrimental to health,[3] lead in plumbing solder was replaced by silver (food grade applications) or antimony, with copper often added, and the proportion of tin was increased.
Mark Shaffer is offline   Reply With Quote


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
Propane Regulator Greg G. Care and Feeding of Molded Fiberglass Trailers 7 07-14-2010 07:46 AM
propane plumbing Paul and Libby Smith Care and Feeding of Molded Fiberglass Trailers 14 11-27-2007 07:02 PM
Propane leak? Kate Carney Problem Solving | Owners Helping Owners 3 07-30-2007 07:34 AM
Propane tanks AbenDeb General Chat 15 07-06-2007 12:32 PM
Propane christineb Care and Feeding of Molded Fiberglass Trailers 12 11-26-2005 10:41 PM

» Trailer Showcase




Roslyn M.
» Upcoming Events
No events scheduled in
the next 465 days.
» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 07:26 PM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.