Beer Plugs Tap Brush,30 Pack Beer Faucet Tap Cleaning Plug Hygiene Brush For Draft Beer Faucet Cap
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Highlighted Features
Convenient Cleaning- Our brush is great to keep your beer faucet clean.It fits with different kinds of beer tap sizes,helps to make cleaning tap become effortless and easy.
The wire can not be pulled out of the handle because of our Advanced welding process of the handle and wire.
High Quality - Featuring a new strengthening technology,the bristles of beer brushes are tightly entwined in twisted wire
Easy to Use - Simply insert the plug into your beer tap opening to keep your beer from dust and other contaminates.
Safe Material- Our brush handle is made of food grade polypropylene,the brush head is made of bristles
3/19 3 PM Central: These are selling for just $15.99. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices and availability can change quickly. Check product page for current info – More About Prices
This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!
VIVOSUN 480GPH/660GPH Submersible Water Pump, 1800L/2500L/H Aquarium Pump, Ultra Quiet Fountain Pump with 7.2ft/8.2ft High Lift for Fish Tank, Pond, Aquarium, Statuary, Hydroponics
More Info
Highlighted Features
Key Parameters: Size: 3.54 x 2.32 x 2.67 inches; Max. Flow Rate: 2500L/H; Power: 35W; Optional Nozzles: 13/16/19 mm; Lift: 2.5 m; Voltage: AC/110V; 60 Hz; Applicable Water Temperature: 39℉ to 95℉
Adjustable Flow Rate: This mini water pump features an adjustable knob that controls the water flow rate; Max. flow rate can reach up to 2500L/H; 3 optional nozzles (13/16/19 mm) allow you to create different view scenes, each with its own unique design; The water column can be elevated up to 3.0 ft
Ultra-Quiet Operation & 4x Suction Cups: Ultra-quiet operation will let you immerse in a comfortable & tranquil atmosphere; Just enjoy the peace and watch your cute fish swimming inside their tank; 4x solid rubber suction cups at the bottom ensures a strong grip
Detachable & Cleanable: This powerful & compact fish tank water pump is easy to hide and disguise; No need for any tools to detach it, simple to separate, and easy to clean
Multi Uses: A well-designed aquarium water pump is beneficial to use for small to medium sized aquariums, ponds, fountains, waterfalls, hydroponic systems, etc
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
I use a similar pump (different manufacturer, features and specifications) for a recirculating draft line cleaning setup. Note that fittings sizes are different on this pump vs the one I use in that build. Adjust accordingly Another possible homebrewing application would be to set this up for use a part of a recirculating wort chiller setup.
Specifications: Dimensions: 3.5” x 2.7” x 2.3”; The 5-ft. long three-core power cord offers convenient installation wherever you need, and the adjustable flow regulating valve lets you control the water flow rate, so you can get just the amount of water pressure you want; Max. Flow Rate: 480 GPH (1800 L/H); Max. Lift Height: up to 7.2 Feet; Watt: 25W; Voltage: AC110V
Detachable & Cleanable: This compact water pump is easy to hide or disguise, and no need for any specialized tools to disassemble or clean it
Optional Outlet Positions: Place the pump flat and rotate the water outlet to a variety of positions; Whatever your heart desires
Wide Range of Applications: This high performance energy-efficient pump works great in ponds, fountains, waterfalls, hydroponic systems, and irrigation systems and so on; Working Temperature: 39℉ to 95℉
4x Suction Cups: The 4x suction cups are strong and require no extra tools to secure; You can affix your pump vertically or horizontally as needed
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
I use a similar pump (different manufacturer, features and specifications) for a recirculating draft line cleaning setup. Note that fittings sizes are different on this pump vs the one I use in that build. Adjust accordingly Another possible homebrewing application would be to set this up for use a part of a recirculating wort chiller setup.
[High-quality Nitrile Gloves] -PEIPU Nitrile gloves are more thicker, stronger and more wear-resistant than typical vinyl gloves.PEIPU Nitrile gloves are 4 mils thick,These gloves shape the hand, provide comfort and responsive grip, are ideal for palms and fingertips, and have optimal sensitivity.
[Comfortable Fit] – Fits like your own skin with excellent protection against liquids, gases, oils, grease, glass, and sharp objects.
[Hygiene] -You can wear them to reduce skin contact with the outside world and maintain personal hygiene and health.
[Applications]- PEIPU Nitrile gloves are designed for cleaning food handling, parts handling, janitorial services, painting and finishing services, food prep, tattoo,pet care, technicians, mechanic, and so on.
[Various Sizes]- containing 100 gloves,Latex-free and powder-free for sensitive hands or foods,nitrile can be stored for a long term without becoming brittle.These nitrile gloves are available in small, medium, large and extra-large sizes
Potential Uses: Help with cleanup on brew day, make your kegs shine like new (see photo below) and use around the kitchen and for BBQ. I use similar gloves when I apply rub for smoking meats. It helps to prevent against cross contamination and I also like that it helps keep my hands from smelling like… bbq rub. If you’re a BBQ-er like me, check out… BBQ Finds, it’s like Homebrew Finds, but for… BBQ.
I use protective gloves when dealing with harsh chemicals The photo above is from my post on rebuilding kegs. Here I’m using Bar Keepers Friend – Jump To: Section on Bar Keeper’s Friend – to clean a keg. I used protective gloves several times during this process.
Note from HBF: These are not appropriate for use with high temps. If you’re looking for something like that, search Amazon for “waterproof heat resistant gloves” to shop around
This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!
Use to clean glasses and just before serving to chill and wet glassware for a better pour.
3/16 5 PM Central: These are on sale for $20.79. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices, promotions and availability can change quickly. Check product page for current info – More About Prices
From the product description, check product page for current description, price and availability:
Make a ball lock keg out out of PET plastic bottles. Great for taking beer to a party or making your own mini keg system with a 2 liter soda bottle.
This tee piece enables you to attach both a liquid and gas ball lock disconnect to the bottle at the same time so you can essencially use a common PET bottle as a keg. Very handy with a two liter soda bottle, as you can get a short length of ¼” interior diameter silicone tubing, attach it to the top Carbonation Cap (not included), fill with beer, and put in the refrigerator, either upright or sideways.
Or if you have Nukatap or Intertap faucets on your draft system, make a draft system cleaner – fill a soda bottle with beer line cleaner, attach an optional ball lock adapter to the end of your Intertap/Nukatap Faucet, and open the faucet to force cleanser into your draft beer system and down the lines.
Note: This is for the tee piece only. You need a soda bottle with standard PCO 1881 thread, 2 item C35 Carbonation Caps, and some ¼” interior diameter tubing to complete your soda bottle keg conversion.
This tee in conjunction with compatible carbonation caps can convert PET bottles into mini kegs or for use flushing or cleaning draft lines.
Related: Use it as Part of a Simple Ball Lock Draft Line Flushing Setup
This post may contain affiliate links. We may make a commission when you use our links. This will never cost you extra. Thank you for supporting Homebrew Finds!
From HBF:Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
Note: There are, generally lots of available options for Armor All Protectant – different sizes and forms. Search Amazon for Armor All Protectant
3/13 4 PM Central: These are selling for just $5.99. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices and availability can change quickly. Check product page for current info – More About Prices
5 Pack Bottle Cleaning Brushes, multiple uses, including 16 inch long handle beer bottle brush with the width 2.5 inch, 13.5 inch long 2.5 inch wide sport water bottle brush, 14 inch long and 0.5 inch wide tube cleaning brush, 10.5 inch long and 1 inch in diameter spout cleaning brush
16'' long bottle brush is easy reach to the bottom and clean all inside area, narrow neck is suitable for beer bottle, wine, decanter, glass jugs, 13.5 inch water bottle brush for use with all standard and wide-neck such as sports bottles, baby bottles, tumbler, insulated water bottle
Made of food grade polypropylene, BPA free materials, resilient and bendable, no peculiar smell, keep safe and healthy, an exceptional value and an excellent gift for your kitchen
Each one of the brushes has unique size and shape for cleaning hard to reach places such as inside tea kettles, sports water bottles, hummingbird feeder, coffee jugs, juice pitchers, canning jars, flower vases, kettle, teapot and much more
Firm and sturdy handle makes the cleaning job easier, the hook is provided to hang it for drying and storage
Use for cleaning… bottles, growlers, tubing and more around your home brewery and beyond.
3/11 2:30 AM Central: This combo is on sale for just $7.99. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices, promotions and availability can change quickly. Check product page for current info – More About Prices
This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!
7.27-LITER WASH BUCKET - This plastic bucket is suitable for holding enough ice to keep drinks cold when camping or at tailgating parties. The storage bucket is also handy to use as a kitchen cleaning caddy or mop tub for washing cars on road trips.
COLLAPSIBLE DESIGN - Thanks to its lightweight and space-saving design, this reusable mop bucket easily collapses down to 2-inches in height for compact storage when no longer in use. Keep one in your home, garage, or packed with camping or hiking gear.
TOUGH CONSTRUCTION - Made from a safe and durable silicone material, this foldable bucket can handle years of normal wear and tear, both indoors and outdoors. The bucket also features a sturdy rim around the top edge for a fuss-free carrying handle.
SPACIOUS INTERIOR - This garden bucket provides a large 7.27-liter capacity for holding picnic supplies, outdoor accessories, cleaning items, or dirty clothes to take to the laundromat. Simply clean with a hose and let air dry in between each use.
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
Potential uses… clean up on brew day and beyond, ice cold drinks, use as a tote on brew day to keep items together.
As of this posting these are back at just $7.96. Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices and availability can change quickly. Check product page for current info – More About Prices
This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!
Price, promotions and availability can change quickly. Check the product page for current price, description and availability. ssprod:B01NALJOWF:ptr
NEW LOOK, SAME FORMULA. Cleans and Polish. As a bleach-free product, this cleanser is an ideal stainless steel cleaner and can easily remove rust, tarnish, mineral deposits, and tough stains from most surfaces.
Note: There are, generally lots of available options for Bar Keepers Friend including different counts and forms. Search Amazon for Bar Keepers Friend
Works Wonders With Stainless!
Bar Keepers Friend is my go-to for deep cleaning stainless, kegs, kettles and such. It works wonders. The picture above is from my post on rebuilding kegs – Jump To: Section on Bar Keeper’s Friend – If you look through the post you’ll see just how good the keg looks at the end.
3/10 3 PM Central: This is selling for just $2.49 (one time purchase). Shipping is also free to many US addresses with Prime Membership [Try Prime for Free] or a qualifying order. Prices, promotions and availability can change quickly. Check product page for current info – More About Prices
This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!
VIVOSUN 480GPH/660GPH Submersible Water Pump, 1800L/2500L/H Aquarium Pump, Ultra Quiet Fountain Pump with 7.2ft/8.2ft High Lift for Fish Tank, Pond, Aquarium, Statuary, Hydroponics
More Info
Highlighted Features
Key Parameters: Size: 3.54 x 2.32 x 2.67 inches; Max. Flow Rate: 2500L/H; Power: 35W; Optional Nozzles: 13/16/19 mm; Lift: 2.5 m; Voltage: AC/110V; 60 Hz; Applicable Water Temperature: 39℉ to 95℉
Adjustable Flow Rate: This mini water pump features an adjustable knob that controls the water flow rate; Max. flow rate can reach up to 2500L/H; 3 optional nozzles (13/16/19 mm) allow you to create different view scenes, each with its own unique design; The water column can be elevated up to 3.0 ft
Ultra-Quiet Operation & 4x Suction Cups: Ultra-quiet operation will let you immerse in a comfortable & tranquil atmosphere; Just enjoy the peace and watch your cute fish swimming inside their tank; 4x solid rubber suction cups at the bottom ensures a strong grip
Detachable & Cleanable: This powerful & compact fish tank water pump is easy to hide and disguise; No need for any tools to detach it, simple to separate, and easy to clean
Multi Uses: A well-designed aquarium water pump is beneficial to use for small to medium sized aquariums, ponds, fountains, waterfalls, hydroponic systems, etc
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
I use a similar pump (different manufacturer, features and specifications) for a recirculating draft line cleaning setup. Note that fittings sizes are different on this pump vs the one I use in that build. Adjust accordingly Another possible homebrewing application would be to set this up for use a part of a recirculating wort chiller setup.
3/26 10:15 AM Central: This is on sale for $16.14 as an Amazon Lightning Deal. Some items are available in multiple variations, check each for Lightning Deal eligibility and pricing. Lightning Deals are limited time and quantity deals and can change quickly. Check product page for current info – More About Prices
Prime Exclusive: As of this posting, this may be exclusively available to Amazon Prime Members. Amazon Prime has a lotof great benefits. Get a Free Trial of Amazon Prime. Shipping is also free for Prime Members. Check the product page for current price, description and availability.
Specifications: Dimensions: 3.5” x 2.7” x 2.3”; The 5-ft. long three-core power cord offers convenient installation wherever you need, and the adjustable flow regulating valve lets you control the water flow rate, so you can get just the amount of water pressure you want; Max. Flow Rate: 480 GPH (1800 L/H); Max. Lift Height: up to 7.2 Feet; Watt: 25W; Voltage: AC110V
Detachable & Cleanable: This compact water pump is easy to hide or disguise, and no need for any specialized tools to disassemble or clean it
Optional Outlet Positions: Place the pump flat and rotate the water outlet to a variety of positions; Whatever your heart desires
Wide Range of Applications: This high performance energy-efficient pump works great in ponds, fountains, waterfalls, hydroponic systems, and irrigation systems and so on; Working Temperature: 39℉ to 95℉
4x Suction Cups: The 4x suction cups are strong and require no extra tools to secure; You can affix your pump vertically or horizontally as needed
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
I use a similar pump (different manufacturer, features and specifications) for a recirculating draft line cleaning setup. Note that fittings sizes are different on this pump vs the one I use in that build. Adjust accordingly Another possible homebrewing application would be to set this up for use a part of a recirculating wort chiller setup.
From the product description, check product page for current description, price and availability:
This bottle brush design has stood the test of time.
This traditional design Beer Bottle Brush, is perfect for cleaning 12 to 22oz beer bottles. If there is any stuck-on residue or dust in the bottom of your bottles the rounded end of the brush will reach in and scrub it out!
Includes circular metal loop for hanging.
Limited Availability Deal of the Day: As of this posting, this is marked down to $2.99 as a MoreBeer Deal of the Day. Shipping is also free to addresses in the contiguous US with most $59 Orders. Availability: This is available today only, while supplies last. Quantities are limited. Check the MoreBeer’s Deal of the Day to check today’s offering.
Product Description – Here– Use coupon code BEERDEAL to get this discount.
MORE MoreBeer Deals!…This post contains affiliate links. We may make a commission when you use our links. This will never cost you extra. Thank you for supporting Homebrew Finds!
The fine granular NON-GMO citric acid is a kitchen essential used in preserving, flavoring, and cleaning completely; preserves the Vitamin C content of a food product.
Adds an acidic or sour taste to meat, candy, soft drinks, and ice cream. It keeps fruits and vegetables fresh and food flavorful. Perfect for craft making, candy making, pH adjustment, water softening, and more!
Perfect for bath bombs, used as the main ingredient along with backing soda (sodium bicarbonate) to make the bath bombs fizz away!!
Helps in sprouting, canning, drying or freezing, bread making, conserving, and jarring. Can also be used as a natural cleaning agent.
Packed in our NEW durable resealable stand up bag which allows for long and safe storage. Available in 1, 2, 5, 10 & 50 pounds
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
Used for adjusting mash pH and by some for cleaning
If you’re using this to adjust mash pH, I highly recommend an accurate gram scale
What are Other’s Saying? Search this product’s Amazon reviews for “brew” – affiliate link, note that multiple variations of this product may be available, as such a different version may appear at this link
This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!
Super Absorbent: Perfect for wiping down any surface, our Swedish dishcloths for kitchen and bathroom cleaning pick up spills and splashes like magic.
Reusable: Step aside, paper towels. This Swedish dishcloth can clean up messes time and time again - just throw in the wash after use and it'll be good as new.
Multipurpose: Safe for marble, stainless steel, tile, and wood surfaces, these kitchen dishcloths also work for scrubbing or drying dishes, cups, mugs, sinks, tubs, and showers.
Value Pack: Get 10 washable dish rags, available in your choice of blue, grey, lime, pink, purple, watermelon red, white, yellow, or assorted colors.
Effective Clean: Made from cellulose and cotton, each dish cloth becomes soft to the touch when wet, and gritty enough for scouring when dry.
This post contains affiliate links. We may make a commission when you use our Amazon links. This will never cost you extra. Thank you for supporting Homebrew Finds!
Regularly cleaning beer lines is an important part of serving tasty beer from your kegerator. Homebrewers use a number of methods to accomplish this from removing tubing to soak in cleaning and sanitizing solutions to DYI pumps to commercial solutions.
Limited Time Deal, 32% Off Stainless Steel Ball Lock Jumpers
Stainless steel ball lock jumper from Valuebrew. This works with both gas and liquid QDs. That means you can jump from keg line to keg line for cleaning and also hook up to the liquid side of your keg to purge with CO2 from the top to the bottom.
Valuebrew has generally struggled keeping things in stock and they’ve… specifically struggled to keep these in stock. As of this posting, these are in stock and on sale. Beyond the discounted price, you can add a second jumper on for even less.
Valuebrew is offering a pack of two jumpers and 25 replacement o-rings for $32.97. Coupon code JUMP discounts the combo by a whopping 32%.
Double Jumper Special! < note that you must use this link along with coupon code JUMP to get the deal, the standard product will not get you the discount
Being able to clean multiple lines at the same time is a big time saver. In years past this would have involved stringing together multiple fittings or partially disassembling your setup.
For ball lock keg users – Ball Lock vs Pin Lock – there is an easy solution available that allows you to clean multiple lines at the same time with minimal effort.
This allows you to connect multiple ball lock kegerator runs by simply snapping them into the jumper. There are a few similar models available. Valuebrew’s features stainless steel construction, food grade o-rings and… it works with both gas and liquid QDs.
This makes connecting two lines very simple. Connect the two ball lock lines and push cleaning solution through one of your faucets.
How about 3 or more lines? The QD side is easy, you’ll need 1 jumper for 2 lines, 2 jumpers for 3 lines and so on. For the faucet side, you need to cut a small piece of tubing to jump between faucets as needed. Keep in mind that each line you add increases resistance. Your pump may do great with two or three lines, but as you add lines, it will have to work harder.
Flushing Lines with CO2: This jumper allows you to connect liquid AND gas lines. That means you can flush lines with CO2 to push out any remaining cleaner or sanitizer and purge O2. Cleaned > Rinsed > Sanitized, Dried and Purged lines! Make sure to use a low pressure that’s compatible with all components in your system if you do this.
This a male beer thread jumper. You would unthread tail pieces and use these jumpers to connect lines together. This is a bit more work that the ball lock jumper for ball lock setups and it wouldn’t include all of your faucets, but it’s a good choice of you use pin lock or sanke connections.
This post may contain affiliate links. We may make a commission when you use our links. This will never cost you extra. Thank you for supporting Homebrew Finds!
Price, promotions and availability can change quickly. Check the product page for current price, description and availability.
Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions. tag:lnksfxd top:cleanmultiple tag:tpru tag:watch
VIVOSUN 480GPH/660GPH Submersible Water Pump, 1800L/2500L/H Aquarium Pump, Ultra Quiet Fountain Pump with 7.2ft/8.2ft High Lift for Fish Tank, Pond, Aquarium, Statuary, Hydroponics
More Info
Highlighted Features
Key Parameters: Size: 3.54 x 2.32 x 2.67 inches; Max. Flow Rate: 2500L/H; Power: 35W; Optional Nozzles: 13/16/19 mm; Lift: 2.5 m; Voltage: AC/110V; 60 Hz; Applicable Water Temperature: 39℉ to 95℉
Adjustable Flow Rate: This mini water pump features an adjustable knob that controls the water flow rate; Max. flow rate can reach up to 2500L/H; 3 optional nozzles (13/16/19 mm) allow you to create different view scenes, each with its own unique design; The water column can be elevated up to 3.0 ft
Ultra-Quiet Operation & 4x Suction Cups: Ultra-quiet operation will let you immerse in a comfortable & tranquil atmosphere; Just enjoy the peace and watch your cute fish swimming inside their tank; 4x solid rubber suction cups at the bottom ensures a strong grip
Detachable & Cleanable: This powerful & compact fish tank water pump is easy to hide and disguise; No need for any tools to detach it, simple to separate, and easy to clean
Multi Uses: A well-designed aquarium water pump is beneficial to use for small to medium sized aquariums, ponds, fountains, waterfalls, hydroponic systems, etc
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
I use a similar pump (different manufacturer, features and specifications) for a recirculating draft line cleaning setup. Note that fittings sizes are different on this pump vs the one I use in that build. Adjust accordingly Another possible homebrewing application would be to set this up for use a part of a recirculating wort chiller setup.
Specifications: Dimensions: 3.5” x 2.7” x 2.3”; The 5-ft. long three-core power cord offers convenient installation wherever you need, and the adjustable flow regulating valve lets you control the water flow rate, so you can get just the amount of water pressure you want; Max. Flow Rate: 480 GPH (1800 L/H); Max. Lift Height: up to 7.2 Feet; Watt: 25W; Voltage: AC110V
Detachable & Cleanable: This compact water pump is easy to hide or disguise, and no need for any specialized tools to disassemble or clean it
Optional Outlet Positions: Place the pump flat and rotate the water outlet to a variety of positions; Whatever your heart desires
Wide Range of Applications: This high performance energy-efficient pump works great in ponds, fountains, waterfalls, hydroponic systems, and irrigation systems and so on; Working Temperature: 39℉ to 95℉
4x Suction Cups: The 4x suction cups are strong and require no extra tools to secure; You can affix your pump vertically or horizontally as needed
From HBF: Make sure the components you use are compatible and rated for your intended application. Contact manufacturer with questions about suitability or a specific application. Always read and follow manufacturer directions.
I use a similar pump (different manufacturer, features and specifications) for a recirculating draft line cleaning setup. Note that fittings sizes are different on this pump vs the one I use in that build. Adjust accordingly Another possible homebrewing application would be to set this up for use a part of a recirculating wort chiller setup.
I think you should replace all keg o-rings when you refurbish or obtain a used keg. Generally speaking they are going to be worn out and even if they aren’t they’ll smell of soda pre-mix. Beyond that, who knows what they’re made from. Start with a clean slate.
What about after that? Of course, you could just keep using them until they break, they smell or look horrible or… until you lose a tank of CO2 due to an o-ring related leak. On the other end of the spectrum some people change o-rings every time they keg.