The Micro Matic D and S series keg couplers have O-Ring seals that sit inside to body. Some manufacturers have these O-Rings directly on the probe itself. Seals wear out over time. If your coupler is very old and seems to leak gas or beer it may be time to change the seals.
You need two of these O-Rings. We have found using a dental hook tool is a good way to get the old O-Rings out. Don’t worry, you don’t have to go to a dental supply store. You can find tools like this at Home Depot, or even here on Amazon.
Remember to lubricate seals with an FDA food grade lube.
Don’t hesitate to contact us if you have any questions about this or any other part we carry. We want to help you get your order right the first time and to keep your project underway.