Washer in Coupler

[BillC]

I just bought a new D System Coupler from Micro Matic. I've been having trouble with Co2 leaks. Where the gas comes into the coupler there is a rubber check valve. Do I need to put a neoprene washer in that connection and also the connection where the beer comes out of the coupler at the top?

Thanks,
Bill

[Larry Tapper]

Yes, There should have been one on the gas side of the new coupler. and you do need one at the beer side.

[BillC]

Thanks Larry!

[Dmac]

I was checking out the D style vs the S style and i just want to clarify on where the gas comes in. The D will have two parts between the nut and coupler and the S will have Three. Now if that is correct: How interchangeable are They?

[Scott Zuhse]

This depends on the actual couplers you are referencing. Check these links to the "D" and "S" couplers. You will notice that the only difference is that the probe and probe seal are different.

If you do have these couplers, you do not require a washer between the one way valve and the tailpiece. If you notice, the tailpiece is designed specifically for this valve. This allows for a seal and holding the valve in place.

If you do not have this coupler, check out the MM Equipment Store for your specific coupler and pull up the replacement parts menu. This will indicate if your coupler requires the seal.

[Dmac]

Then i think the parts must not be the same. I believe that the S coupler is HERE And thus needing that Extra part. Thanks