I was curious why there are iron pipe fitiings and compression
fittings? Seems like plumbing would be easier with one type{compression
or pipe} of fitting. So in what situation would you use compression
over iron pipe and vice versa? Are compression fittings designed to
take more water presssure? Thanks.

wrote:
I was curious why there are iron pipe fitiings and compression
fittings? Seems like plumbing would be easier with one type{compression
or pipe} of fitting. So in what situation would you use compression
over iron pipe and vice versa? Are compression fittings designed to
take more water presssure? Thanks.

Aren't iron pipe fittings often compression? What is a pipe screw/thread
fitting if it isn't compression?

For example, some toilet valves are compression, some aren't. One valve
may have a compression inlet and an iron pipe or non-compression
outlet.
Codswallop wrote:
wrote:
I was curious why there are iron pipe fitiings and compression
fittings? Seems like plumbing would be easier with one type{compression
or pipe} of fitting. So in what situation would you use compression
over iron pipe and vice versa? Are compression fittings designed to
take more water presssure? Thanks.

Aren't iron pipe fittings often compression? What is a pipe screw/thread
fitting if it isn't compression?

wrote

I was curious why there are iron pipe fitiings and compression
fittings?

Historically heating pipework was run in galvanised pipe with threaded iron
fittings.
In this case the joint seal was provided by sealant (boss white and hemp
originally) wrapped around the male thread before the joint was made.
Compression fittingsAFAIK came into popularity with the use of softer copper
pipe and rely on the crimping of an olive to the outside of the pipe to form
part of the seal. The other part of the seal is made between a taper on the
end of the olive and a corresponding taper on the fitting.
At joints between fixed equipment like hot water cylinders, there is still a
requirement to make a thread seal (usually nowadays achieved using PTFE
tape) before conversion to compression fittings or soldered.

But with the advent of plastic, a lot has changed. As well as threaded and
soldered copper work close to equipment (plastic is not recommended close to
a boiler for instance) there are push fit fittings. To confuse things,
compression fittings can be used on plastic but require a plastic
reinforcing sleeve be inserted in the pipe end.

The plastic option has a great deal of support in this NG partly because of
speed and ease of install.
Many it has to be said remain to be convinced.

HTH


Phil

On Thu, 5 Oct 2006 01:44:23 UTC, wrote:

I was curious why there are iron pipe fitiings and compression
fittings? Seems like plumbing would be easier with one type{compression
or pipe} of fitting. So in what situation would you use compression
over iron pipe and vice versa? Are compression fittings designed to
take more water presssure? Thanks.

Do you actually mean iron? As in *iron pipe*? Or by 'iron' do you mean a
soldered rather than a screwed fitting, but both on copper pipe?

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
Avenue Supplies, http://avenuesupplies.co.uk

In article ,
Codswallop wrote:
Aren't iron pipe fittings often compression? What is a pipe
screw/thread fitting if it isn't compression?

How does a thread compress? Compression in this context refers to the
olive which grips the pipe. The threads on a compression fitting pay no
part in the sealing, whereas they do on iron barrel.

--
*Don't sweat the petty things and don't pet the sweaty things.

Dave Plowman London SW
To e-mail, change noise into sound.

wrote in message
ups.com...
I was curious why there are iron pipe fitiings and compression
fittings? Seems like plumbing would be easier with one type{compression
or pipe} of fitting. So in what situation would you use compression
over iron pipe and vice versa? Are compression fittings designed to
take more water presssure? Thanks.

Steel pipe compression fittings are much easier to use than threaded
connectors when you want to cut into an existing pipe and install something
in it, particularly if you want to be able to remove the item to service it
later. I supply insect screens for water storage cistern overflows, which
need to be cleaned from time to time, and, up to 2" pipe, steel pipe
compression fittings are quite a common choice. Above that, the screens are
often fitted using flanges or, up to 6" pipe, can fitted with slip-over
rubber sleeves held in place by Jubilee clips.

Colin Bignell

I mean iron pipe On Thu, 5 Oct 2006 01:44:23 UTC,
wrote:
I mean iron pipe. If i understand this, compression fittings aren't necessarilly used because they withstand more water pressure, but they are easier to work install or repair.
I was curious why there are iron pipe fitiings and compression
fittings? Seems like plumbing would be easier with one type{compression
or pipe} of fitting. So in what situation would you use compression
over iron pipe and vice versa? Are compression fittings designed to
take more water presssure? Thanks.

Do you actually mean iron? As in *iron pipe*? Or by 'iron' do you mean a
soldered rather than a screwed fitting, but both on copper pipe?

--
The information contained in this post is copyright the
poster, and specifically may not be published in, or used by
Avenue Supplies, http://avenuesupplies.co.uk