The best CO2 regulator washer depends on your fitting size and how many replacements you want on hand. Minnisend is a practical pick for a 20-washer supply with listed dimensions; FROG emphasizes centering fins and sealing ribs; and Preece Precision suits buyers who need a bulk bag. The options below are designed for CGA-320 connections, but check your regulator and washer dimensions before ordering. A nylon washer is not interchangeable with every permanent regulator O-ring.
| Product | Best for | Pack size |
|---|---|---|
| Minnisend | Dimension-specific replacement stock | 20 |
| FROG | Centering and sealing features | 12 |
| WELLBOM | General CGA-320 replacement needs | 16 |
| Robby’s Cloud | Multiple CO2 applications | 15 |
| Preece Precision | Bulk replacement supply | 100 |
Minnisend 20-Pack Nylon CO2 Washers
Minnisend washers are listed for CGA-320 regulator fittings and measure 3/4 inch outer diameter, 1/4 inch inner diameter, and 0.110 inch thick. The product description identifies nylon construction and a self-forming seal for CO2 and nitrogen equipment.
Best for: Buyers who want a larger replacement supply and can confirm the listed dimensions match their connection. The 20-count pack provides spares for future washer changes.
Limitation: These are specified for CGA-320 fittings, so do not assume they fit a different connection standard. Check dimensions before purchasing.
FROG Self-Centering Regulator Washers
FROG’s nylon washers are listed for CGA-320 fittings and have dimensions of 3/4 inch outside diameter, 1/4 inch inside diameter, and 0.110 inch thickness. The stated design includes sealing ribs and centering fins intended to help position the washer in the fitting and form an airtight seal.
Best for: Buyers who prioritize washer positioning features and want a 12-piece pack. The product description also states that the washers are engineered in the USA.
Limitation: The pack contains fewer pieces than several 15- or 20-count options. Confirm the dimensions and fitting type before ordering.
WELLBOM 16-Pack Nylon Washers
WELLBOM provides 16 white nylon washers described as replacements for CGA-320 keg regulator fittings. The listing highlights smooth edges, tear and compression resistance, and sealing between a regulator and CO2 tank.
Best for: Homebrewers and other users seeking a mid-size pack for CGA-320 replacement needs. It offers more pieces than the FROG pack while remaining a smaller order than a bulk bag.
Limitation: The supplied product details do not list washer measurements. Verify fit with the seller’s specifications or your existing washer before buying.
Robby’s Cloud Self-Forming CO2 Washers
This 15-pack of nylon washers is listed for CGA-320 fittings. The product description says the washers form to the regulator to create a seal and names draft beer, soda beverage, and hydroponic applications.
Best for: Buyers looking for washers described for several types of CO2 tank setups, rather than only a kegerator. It is a middle-ground pack size for keeping replacements available.
Limitation: The listing specifically says the washers do not work as a Taprite permanent O-ring. Avoid using them for that purpose.
Preece Precision 100-Piece Washer Bag
Preece Precision offers 100 nylon washers for sealing the regulator nut and nipple connection to a carbon dioxide tank with a CGA-320 connection. The listing describes the washers as thick and intended for durability and repeated use.
Best for: Buyers who replace washers regularly or need a large quantity for multiple CO2 setups. Its bulk count is substantially higher than the other picks in this guide.
Limitation: A 100-piece bag may be more than a single household setup needs. The provided description does not specify the washer dimensions, so confirm the fit before purchase.
Buying Guide: Choosing A CO2 Regulator Washer
Does the washer match your fitting?
Start by checking the regulator and tank connection. The products in this guide are described for CGA-320 fittings, but that does not establish compatibility with other connection types. Compare the fitting designation and, when available, the washer’s outer diameter, inner diameter, and thickness. Minnisend and FROG list dimensions of 3/4 inch, 1/4 inch, and 0.110 inch, respectively.
How many replacement washers do you need?
Choose pack size based on expected replacements and storage. The listed choices range from 12 washers in the FROG pack to 100 in the Preece Precision bag. A smaller pack may suit occasional home use, while a bulk quantity is more appropriate when you need many spares. Pack size alone does not confirm compatibility.
Are centering fins or sealing ribs important?
Some product descriptions specifically mention these features. FROG lists both sealing ribs and centering fins, while Indanpow also describes these features but is not included among the five picks. Such features describe washer design; they do not replace checking correct installation, fitting type, and dimensions.
Can a nylon washer replace a permanent O-ring?
Not necessarily. Robby’s Cloud explicitly states that its washers do not work as a Taprite permanent O-ring. Treat a tank-connection washer and a regulator’s permanent seal as distinct parts unless the manufacturer confirms they are interchangeable.
Frequently Asked Questions
What is a CO2 regulator washer used for?
It sits at the regulator-to-tank connection to help seal the joint. Several products in this guide describe their washers as forming an airtight seal between the regulator and CO2 tank.
What size are common CGA-320 washers in this list?
Minnisend and FROG list dimensions of 3/4 inch outside diameter, 1/4 inch inside diameter, and 0.110 inch thickness. Confirm that these measurements suit your fitting.
How often should I replace a regulator washer?
The supplied product details do not specify a replacement schedule. Check the washer and connection during setup, and follow the regulator or equipment manufacturer’s instructions for replacement.
Can these washers be used with nitrogen?
Minnisend describes use with nitrogen tanks as well as CO2 equipment. For other products or systems, verify the intended application and connection requirements before use.
Which pack is best for a large supply?
Preece Precision is the largest listed option at 100 pieces. Choose it when you need bulk quantity, and confirm the washer dimensions and CGA-320 connection fit first.