Pipe expander questions

[mayto]

Hello folks
I am looking at getting a pipe expander and need your knowledge Are 1/2 inch and 15mm expander heads approx. the same specs, or is 1/2 " head for aircon tubing with 1/2" O.D. ? I want to expand 1/2 copper irish(14.7mm O.D.) slightly so I get a nice tight fit when pushed into an endfeed. I am basically making a filter out of copper pipe and does not need to be watertight, just snug fit in the endfeeds and be able to take it apart. I think a pipe expander is the best option, crimping endfeeds is not ideal. What do you guys think?
cheers

 

[WHPES]

Seen them for sale but IMO not worth the money. Far easier to use a capillary solder fitting. What difference is it to solder 2 sides as opposed to just 1. You still have to heat it up.

 

[Aidan-g]

yep they are a handy tool,i use them to expand irish 1/2 inch solder elbows to fit on to the english size copper tails that comes with most kitchen sink taps