Union not fitting on pump

[Reefer911]

I recently purchased this Royal Exclusiv 25w pump and had to acquire some metric unions for it. Their website states that the inlet and outlet are 32mm and 25mm so I ordered those unions. The 25mm fits perfectly but the 32mm does not screw on and is a little big. It’s not overly big, but just big enough that it won’t tighten. Any ideas? The metric unions I ordered are from Coral Vue (who failed to ship part of my order).

 

[HankstankXXXL750]

How close is it to a tight fit? Could you wrap the threads with thread tape and get it to tighten and seal?

 

[Reefer911]

Yes, its that close. I thought about doing that but wanted to try to get it right first. I took the pump to Menards last night and a 1.5" fitting threads on it pretty well so I will go buy a 1.5" schedule 80 union and hope I can fit the 32mm piece inside it.

 

[mfinn]

@slief