What's the trick for putting a new o-ring on taprite regulator?

So I noticed the other day when changing the co2 tank that the o-ring (it's the newer one with the red knobs - has no washer and is labeled as such) was damaged, and slightly leaking.

So I order some new ones, I pull off the old and the regulator has a circular groove that looks like the o-ring was pressed into....the new ones don't fit in that groove. Now after about 20 min of trying to balance it just right I got it on and I think it's sealed.

But why would you put a groove there if you can't fit the o-ring in it?

 

Yeah it's a little difficult to get on. Mine somehow came off when I first started using my regulator, I think because the regulator was in my keezer and the cold caused the o-ring to somehow stick to the tank when I disconnected them. Must not have been on very good. I remember having the hardest time figuring out how to put it back on but I think I just jammed it into the groove if I remember correctly. Haven't had any leaks so I reckon I got it back on correctly.

 

I didn’t jam it in there...I lined it up and screwed it tight. I suppose maybe that jammed it in there...I don’t hear any leaks and will soap it up in a bit but the gauges are holding steady after a few hours.

 

You have to remove that center post with an allen wrench, apply keg lube to the new gasket and insert, then install the center post again.

 

Good call, now that you mention it I think I did finally unscrew something to get the gasket back on. Obviously it was such a painful experience I blocked it from memory

 

What? Seriously I’m not sure I understand what your saying.

All I saw was the big nut that threads the main horizontal tube on to the co2 tank.

This is the regulator I have. https://www.taprite.com/t752hp-t752hp

Exploded diagram - https://d163axztg8am2h.cloudfront.net/static/doc/2e/3f/b4f4ceb420a060d53ecb2d92ee22.pdf

 

Look at the 2nd and 3rd pictures. That's what he's referring to

https://www.homebrewing.org/Taprite-Co2-permanant-O-ring-for-Nipple_p_3726.html

 

Oh. Is that like a tiny Allen wrench? I thought that was just a hole for the co2

 

Seems like it accomplishes both tasks.

 

I wouldnt say its tiny but either way, yes, that inner bushing comes out for gasket replacement.

 

I’ll be dammed. Wish I asked that question before wasting 3 o-rings

Thanks everyone!!