internal wrench

Brian_74

To remove and to install a steam trap union nut nipple am I right in thinking that I'll need an internal pipe wrench? If I do, any opinions about which style is the best?

Charlie from wmass

The third one is the kind I use

The middle is used for toilets and urinal spuds, and the first is used for small pipe nipples. Like Shower head arms.

Brian_74

For once I don't need the most expensive tool!

Thanks, Charlie, for clarifying which is which. I do need one for trap installation and removal, then, don't I?