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Posted by bill allemann on January 29, 2007, 11:35 am
By angle adjustment, I think he meant that the pipes on each size can rotate
with respect to each other.
Bill
> Robert11 wrote:
>> Hello:
>>
>> Have done a fair amount of home plumbing type of work, but, surprisingly,
>> have never had need to use a "union".
>>
>> Have to run a line from a washing machine water outlet to the machine,
>> and for various reasons, before I get to the hose itself, I could use a
>> Union in the rigid section to provide some angularity adjustment, as well
>> as the removable advantage they provide.
>>
>> Have looked at them at HD, and frankly they make me very nervous.
>>
>> What's your experience with these things.
>> e.g.,
>>
>> Once you snug them up, do they tend to stay that way ?
>>
>> Reason i'm asking is that there is no elasticity in the union coupling
>> itself, so it seems to me that if the threads back off, even a very small
>> amount, there will be leakage thru the ground and polished seat where the
>> two pieces actually come together.
>>
>> Any thoughts on this ?
>> Safe to use ? Proven in practice pretty well ?
>>
>> Are there any other types, or brands, besides the HD ones that are
>> perhaps of better quality ?
>>
>> Thanks,
>> Bob
>
> Union provides no more angular adjustment than a coupling. If you want
> adjustability, use several back-to-back 45 or 22 degree ells.
>
> Best regards,
> Bob
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Posted by Sacramento Dave on January 27, 2007, 9:12 pm
> Hello:
>
> Have done a fair amount of home plumbing type of work, but, surprisingly,
> have never had need to use a "union".
>
> Have to run a line from a washing machine water outlet to the machine, and
> for various reasons, before I get to the hose itself, I could use a Union
> in the rigid section to provide some angularity adjustment, as well as the
> removable advantage they provide.
>
> Have looked at them at HD, and frankly they make me very nervous.
>
> What's your experience with these things.
> e.g.,
>
> Once you snug them up, do they tend to stay that way ?
>
> Reason i'm asking is that there is no elasticity in the union coupling
> itself, so it seems to me that if the threads back off, even a very small
> amount, there will be leakage thru the ground and polished seat where the
> two pieces actually come together.
>
> Any thoughts on this ?
> Safe to use ? Proven in practice pretty well ?
>
> Are there any other types, or brands, besides the HD ones that are perhaps
> of better quality ?
>
> Thanks,
> Bob
Unions are fine If you are going from Iron to copper you need a dielectric
union. Also when installing one coat the threads with pipe dope if a non
dielectric also coat the face, don't be afraid to tighten them. A union
should always be accessible. What I like better is a Left/Right nipple witch
also are made for dielectric use. Now if you want some flexibility buy a
flex hose. Basically pipe threads on the end of a stainless hose, They also
make a copper sweat flex. If this is going to be something you see
disconnecting now and then start off with a ball valve.
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Posted by digitalmaster on January 28, 2007, 8:04 am
>
>> Hello:
>>
>> Have done a fair amount of home plumbing type of work, but, surprisingly,
>> have never had need to use a "union".
>>
>> Have to run a line from a washing machine water outlet to the machine,
>> and for various reasons, before I get to the hose itself, I could use a
>> Union in the rigid section to provide some angularity adjustment, as well
>> as the removable advantage they provide.
>>
>> Have looked at them at HD, and frankly they make me very nervous.
>>
>> What's your experience with these things.
>> e.g.,
>>
>> Once you snug them up, do they tend to stay that way ?
>>
>> Reason i'm asking is that there is no elasticity in the union coupling
>> itself, so it seems to me that if the threads back off, even a very small
>> amount, there will be leakage thru the ground and polished seat where the
>> two pieces actually come together.
>>
>> Any thoughts on this ?
>> Safe to use ? Proven in practice pretty well ?
>>
>> Are there any other types, or brands, besides the HD ones that are
>> perhaps of better quality ?
>>
>> Thanks,
>> Bob
> Unions are fine If you are going from Iron to copper you need a dielectric
> union. Also when installing one coat the threads with pipe dope if a non
> dielectric also coat the face, don't be afraid to tighten them. A union
> should always be accessible. What I like better is a Left/Right nipple
> witch also are made for dielectric use. Now if you want some flexibility
> buy a flex hose. Basically pipe threads on the end of a stainless hose,
> They also make a copper sweat flex. If this is going to be something you
> see disconnecting now and then start off with a ball valve.
>
You can also go from iron/steel to copper with a brass valve eliminating the
need for a dielectric union/nipple if that would be more appropriate.You can
also purchase 3 piece valves so the valve itself acts as a union,valve,and
dielectric connection.Would be hard to say without seeing the install
location.
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Posted by Steve Barker on January 27, 2007, 9:54 pm
They've been used for scores of years. With threaded iron plumbing, they
were a must. Yes, they work. And yes, they stay seated. Can you imagine a
water heater hooked up without them? Or a water softener? What a pain that
would be.
--
Steve Barker
> Hello:
>
> Have done a fair amount of home plumbing type of work, but, surprisingly,
> have never had need to use a "union".
>
> Have to run a line from a washing machine water outlet to the machine, and
> for various reasons, before I get to the hose itself, I could use a Union
> in the rigid section to provide some angularity adjustment, as well as the
> removable advantage they provide.
>
> Have looked at them at HD, and frankly they make me very nervous.
>
> What's your experience with these things.
> e.g.,
>
> Once you snug them up, do they tend to stay that way ?
>
> Reason i'm asking is that there is no elasticity in the union coupling
> itself, so it seems to me that if the threads back off, even a very small
> amount, there will be leakage thru the ground and polished seat where the
> two pieces actually come together.
>
> Any thoughts on this ?
> Safe to use ? Proven in practice pretty well ?
>
> Are there any other types, or brands, besides the HD ones that are perhaps
> of better quality ?
>
> Thanks,
> Bob
>
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Posted by Robert11 on January 28, 2007, 7:22 am
Hello all,
Thanks for all the information, and time to help me out.
Appreciate it.
Just one quick follow-up, please:
What type of Grease, or other lubricant, should the mating faces be lightly
coated
with prior to assembly ? Any reasons not to (water usage) ?
Thanks,
Bob
--------------------------
> Hello:
>
> Have done a fair amount of home plumbing type of work, but, surprisingly,
> have never had need to use a "union".
>
> Have to run a line from a washing machine water outlet to the machine, and
> for various reasons, before I get to the hose itself, I could use a Union
> in the rigid section to provide some angularity adjustment, as well as the
> removable advantage they provide.
>
> Have looked at them at HD, and frankly they make me very nervous.
>
> What's your experience with these things.
> e.g.,
>
> Once you snug them up, do they tend to stay that way ?
>
> Reason i'm asking is that there is no elasticity in the union coupling
> itself, so it seems to me that if the threads back off, even a very small
> amount, there will be leakage thru the ground and polished seat where the
> two pieces actually come together.
>
> Any thoughts on this ?
> Safe to use ? Proven in practice pretty well ?
>
> Are there any other types, or brands, besides the HD ones that are perhaps
> of better quality ?
>
> Thanks,
> Bob
>
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