On Saturday, July 26, 2014 6:24:05 AM UTC+1, harry wrote:
"Dennis@home" wrote in message

eb.com...

On 25/07/2014 21:03, harryagain wrote:

"Dennis@home" wrote in message

eb.com...

On 24/07/2014 06:44, harryagain wrote:



Full of bollix as per usual.

If you want to be able to dissemble a pipe the correct fitting to use

is

a

union.

http://www.supplyhouse.com/Copper-Unions-131000



Threaded joints rapidly expend the female side and cease to be

water/gas

tight if tightened a few times.







Idiot, a tap connector is a union!

The thread has nothing to do with the seal.



A tap connector is not a union ****-fer-brains.

Don't you know the difference between parallel and taper threads?







unions are parallel and so are tap connectors, don't you know anything

about what you post about?



Unions (where threaded) have taper threads.

The mating surfaces have either a soft joint or are metal and conical.

Here you are ****-fer-brains.

Read the second line.

http://www.pipefittingsdirect.co.uk/.../en-uk/d8.html


Much as I hate to agree with anything Dennis says, it's a taper seat, Harry, not taper thread.

The union threads are parallel, but the pipe threads by which the 2 parts of the union are fixed to the pipe are usually BSP taper.

Some unions have flat faces and require a washer to seal.

Some (Navy pattern) have a spherical bronze seat and don't need a washer.