The unions you have in the link WILL NOT WORK. I tried this and the threads are different. It would have been nice (perfect in fact) but I now have a $30 paper weight. So this is what I did (and will do):
See the pictures below.
Returns: My piping wasn't glued so the BRS metric adapters (yes, misspelled in the picture...) would fit directly into the unions on the returns. The
25mm to 3/4" adapter.
Drains: The drain piping was glued into the union. Since the adapters fit into a metric FITTING (such as an elbow, union, coupling, etc.) I couldn't use it. I called up Pro Clear and they were able to send me the unions without the piping glued. Now I can use the union to glue in the BRS adapter and finish my drain piping. The
32mm to 1" adapter. I haven't started this yet as I just got the unions the other day.
The adapters take up some room and i finally just did some tubing (yes I know......) but so far a month no leaks. I does make it nice when I need to remove.
Let me know if you have more questions.
I do have to give a shout out to Pro Clear! They were really quick to respond and I had no issues getting these! Thanks again Pro Clear!
I know some folks don't want to glue their piping (plug and play) but it would be nice to leave these unglued if you do want to do something like this on your aquarium piping.