So, it is wholesale? I don't know how convincing I'll be as a "landscape installer" when I'll be stammering and not even knowing the right terminology

Just walk up to the sales counter and say cash sale. Bingo bango no problemo. They get a ton of aquarium nuts coming in and looking for fittings... just explain you are one of those nuts.
They only supply thread/thread bulkheads... not the more popular slip/slip bulkheads.

Ok, cash sale. Got it. Bingo bango lol

Hello

It's been a while but I recall I once found bulkheads at a bath tub supplier at North Van. Sorry can't be more precise but thought it's worthwhile to throw in bath tub suppliers as a potential source on top of irrigation suppliers which is also a valid obvious choice.

Titus

It's been a run around for sure. Yesterday we finally had time to shop. We went to 4 places, and to two of those places twice (different locations). Finally found the right bulkhead back at the first place I ever looked - JL - which just had new stock come in.

I still had to order the black bushing (look at me and my fancy new plumbing lingo) to replace that white one that was bugging me, from BRS. Only white ones up here. I have to go down to p/u my new skimmer anyway:lol: