Replies

1. 
   jim_walker | Jun 29, 1999 03:20am | #1

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   I'm still struggling with home plumbing improvements. Has anyone tried pvc/cpvc compression fittings on rigid copper water lines? How good are they (pressure ratings, etc.)
   and how long do they last? I fear using solder joints - leaks and setting the house on fire!

1. 
   Frank_LaPiana | Jun 29, 1999 08:20am | #2

   *I ripped out my 2nd floor bathroom and all the copper lines to the basement (which ran through the kitchen). Used a compression fitting to the existing copper lines at the basement and then ran CPVC up for both hot and cold water.I used CPVC over copper because there's a certain amount of flex in it, that copper doesn't have. I had multiple compound curves. And as a plastic, I'm guessing that it won't sweat as much nor lose heat on the hot-water line as fast.PVC isn't rated for inlet use; it looses strength as temperature rises. Also, water pressure can sometimes "surge" over the nominal 60-80 psi which can burst PVC. PVC isn't allowed by most codes except for waste outlet, where it isn't under pressure.I've also repaired and extended part of the existing copper system, and soldering is quite easy - really it's nothing to be afraid off. You can buy a heat-shield if you're worried about fire (lead-sided fibreglass).

2. 
   jim_walker | Jun 29, 1999 04:09pm | #3

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3. 
   Guest_ | Jun 29, 1999 04:09pm | #4

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   When I solder piping, I use a trick that welders use. Solder up all the piping, and as much of the branches and risers on sawhorses (in position) then lift the whole works up and hang it.

   Use a piece of scrap duct screwed to surrounding wood and you'll have no problem soldering in place.