Okay - I've read both of the major threads on this mod and will be doing this soon, but here's my confusion:
Some people use union p/n 90404-51026 (1/4" barb) and this seems to thread down all the way to the nut.
Some people use union p/n 90404-51319 (3/8" barb) and this seems to thread in but has quite a few threads still showing.
Both of the above p/n's are metal and have 1/8" NPT threads and everyone's using teflon tape for installation.
The poster above me has used a brass fitting with 1/8" BSPT threads with no problems. If the threads are BPST threads, then people using the 1/8" NPT fitting may run into problems down the road.
In reading all of the postings with regards to this mod, the majority of people have no problems, but some have had the fittings not thread in correctly, not been able to tighten the fitting or they have been loose and wobbly, and in one case, not been able to remove the loose fitting after installing it.
Everyone seems to have an opinion, due to what worked for them, but does anyone know - definitively - what the thread should be on this fitting and which part should be used??
I got the one listed in the first post and it worked