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help on soldering wenmang@yahoo.com 07-29-2006
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Posted by Stubby on July 29, 2006, 4:39 pm
More precisely, flux seals out oxygen which would otherwise react with
the brass and form a non-solderable layer of oxide. With a very clean
joint (both surfaces), flux, good solder, and adequate heat (use MAPP
gas), heat the joint where you want the solder to run. Then apply the
solder and wipe off the excess with a damp rag.


Joseph Meehan wrote:
> wenmang@yahoo.com wrote:
>> Hi,
>>
>> I start trying to solder brass valve for one of my garden hoses. The
>> problem is that the solder does not drawn into the joint. I follow the
>> instruction on Black & Decker home repair book. Solder melt at the
>> edge of the joint, then drop on the ground, and it does not suck into
>> the joint. I tried a couple of times, no solder ever drawn into the
>> joint and solder stays at the edge of joint, that is it. How am I
>> going to solder it correctly for brass valve? I heated the center of
>> the valve back and forth, nothing happened.
>>
>> thx
>
> To me it sounds like it is not clean enough (flux aids in the cleaning)
> or it is not hot enough, in that order.
>

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Posted by Joseph Meehan on July 29, 2006, 9:05 pm
Stubby wrote:
> More precisely, flux seals out oxygen which would otherwise react with
> the brass and form a non-solderable layer of oxide.

Thanks for the clarification. I was not sure of it at the time, brain
dead again, and I did no bother to look it up.

> With a very clean
> joint (both surfaces), flux, good solder, and adequate heat (use MAPP
> gas), heat the joint where you want the solder to run. Then apply the
> solder and wipe off the excess with a damp rag.
>
>
> Joseph Meehan wrote:
>> wenmang@yahoo.com wrote:
>>> Hi,
>>>
>>> I start trying to solder brass valve for one of my garden hoses. The
>>> problem is that the solder does not drawn into the joint. I follow
>>> the instruction on Black & Decker home repair book. Solder melt at
>>> the edge of the joint, then drop on the ground, and it does not
>>> suck into the joint. I tried a couple of times, no solder ever
>>> drawn into the joint and solder stays at the edge of joint, that is
>>> it. How am I going to solder it correctly for brass valve? I heated
>>> the center of the valve back and forth, nothing happened.
>>>
>>> thx
>>
>> To me it sounds like it is not clean enough (flux aids in the
>> cleaning) or it is not hot enough, in that order.


--
Joseph Meehan

Dia duit



Posted by Tony Hwang on July 29, 2006, 4:52 pm
wenmang@yahoo.com wrote:
> Hi,
>
> I start trying to solder brass valve for one of my garden hoses. The
> problem is that the solder does not drawn into the joint. I follow the
> instruction on Black & Decker home repair book. Solder melt at the edge
> of the joint, then drop on the ground, and it does not suck into the
> joint. I tried a couple of times, no solder ever drawn into the joint
> and solder stays at the edge of joint, that is it. How am I going to
> solder it correctly for brass valve? I heated the center of the valve
> back and forth, nothing happened.
>
> thx
>
Hi,
Cleaned the parts to be soldered? Shiny clean. Applied flux?
Heating the parts to be soldered? Then apply solder which will
flow by capillary action.

Posted by Alan on July 30, 2006, 2:52 am

> Hi,
> Cleaned the parts to be soldered? Shiny clean. Applied flux?
> Heating the parts to be soldered? Then apply solder which will
> flow by capillary action.

No, not shiny clean, the surface should be roughened a bit like with
sandpaper. Then wipe on waterbase flux on all contact areas to be
joined. The brass fittings will require a LOT more heat than copper to
get what you want done. It's not welding, but it is significantly
hotter than simple copper work. Remarkably, the flux will suddenly be
drawn in the void between the parts, and you'll know it worked. Be
careful not to move the parts when hot, or the solder joint can be
broken. Rather, dip in a bucket of water or hose the parts off to
quickly cool the finished joint.


Posted by m Ransley on July 30, 2006, 3:29 am
I have seen a plumber fail to heat enough with propane after hours of
trying on 1.5" pipe, he did not have map gas.


Page 2 of 6       < 1 2 3 > last >>
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