Okay, need a little help here. My new tank pvc is supposedly Japanese metric (JIS). The return is 25mm JIS and the overflows are 32mm JIS. I want to simply use a coupler like this to convert these to standard. I want to convert the 25mm to 3/4" and the 32mm to 1" if possible.
I reached out to Pro Clear and one of their sales people responded and was somewhat helpful. I think he didn't want to get too specific and he didn't want to feel responsible if I bought the wrong fittings, I get that. He suggested I reach out of Flexpvc.com (linked above). He further stated:
JIS 25mm is the equivalent to and outer diameter of 32mm while DIN (European metric) is 1:1. (In this case JIS25 and DIM 32 both have an outer diameter of 32mm). With this, the JIS 20mm converts to DIN 25mm.
I tried to use the Contact Us form on Flex PVC's website for more guidance and I keep getting an error that states "cannot process at this time" whenever I click submit. So, if anyone has some guidance I'd greatly appreciate it.
Would these work? I see the 32mm is out of stock but they are made by Adaptive Reef. Maybe reach out to them or see if other sites carry their products.

Metric to Standard PVC Union - Slip X Slip
Adaptive Reef Metric to Standard PVC Adapter Unions make it incredibly simple and clean to plumb skimmers, pumps, reactors, and other equipment with European metric connections into your system. Each union has two female slip fitting connections, one with a metric side and one with a standard US...
