I apologize for posting here, but I didn't get any response on the other threads. Anybody know what size O Ring I need for the end of a tsunami pump.

I always take mine fatsac fittings to the local hardware store and they have what I need. You might want to do the same with your pump.

I have and can't find anything that'll fit but I'm still trying. Do you have any idea what they sold you? Thanks.

McMaster-Carr.com

Thanks

I had to buy an O ring that was a little bigger than what fit from Lowes. then I cut it and it fit in the pump. It works just fine now.