Osprey Hydraulics Reservoir - 3 Liters
For hot days and long hauls between water sources, the 3-liter Osprey Hydraulics reservoir provides big volume. Updates from the previous version make filling, carrying and operating easier than ever.




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- Updates from previous version include ergonomic handle, bite valve and opening design
- Comfortable handle allows for true one-handed filling; it's now also easier to carry and pour from the reservoir
- Compact bite valve preserves excellent water flow in a smaller package; on/off lever is thumb-operable and easy to regulate with one hand
- Compact Slide-Seal opening allows for one-handed filling, removes bulkiness, slides into packs easily and seals securely; compatible with HydraClip attachments in Osprey packs
- All parts in this system—including the magnet, sternum slider and sternum buckle—have been updated to ensure a more secure hose capture
- Center baffle flattens the profile and carries the stiffness of the backer plate to the front panel, which reduces bending and buckling when loading reservoir into your pack
Imported.
View the Osprey Hydraulics Product LineView all Osprey ReservoirsBest Use | Multisport |
---|---|
Liquid Capacity (L) | 3 liters |
Liquid Capacity (fl. oz.) | 101.4 fluid ounces |
Bite Valve Shut-off Switch | Yes |
Wide-Mouth Opening | Yes |
Quick Disconnect Tubing | Yes |
Material(s) | TPU film |
Dimensions | 17 x 7.7 x 0.4 inches |
BPA Free | Yes |
Weight | 8.3 ounces |
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A light and trusty hydraulic system
I’ve been using an older model 2L Osprey hydraulic system for many years and was excited to try this new model! It’s a definite improvement in many ways. First off, the 3L is lighter than the old 2L, which is always good. The new hose design disconnects from the main piece which makes it much better and less messy to clean! I’ve not had any issues with Slide-Seal top and found it to be so much easier to fill and empty. The carry handle makes it a cinch to get in and out of my backpack. This is going to get so much use, and because of it’s size, it’ll stay in my backpack all the time!
Thoughtful and great water bladder.
I like many things about my Osprey Hydraulics water bladder (3 liter, about 100 fl. oz). First, the magnetic attachment for the bite valve is great: it fits standard backpack webbing, can be adjusted but generally remains where you put it, and is strong enough to actually hold the bite value in place. Second, the external "frame" adds a pretty good amount of support so that stuffing the bladder into a backpack is much easier than the older styles with no support. It's a small thing, but not having to fight with the reservoir every time I go and put it into a pack has been great. Third, the opening for filling/cleaning the pack is well designed. I thought it was a gimmick at first, but there is a "flap" that sort of catches and directs water when you pour/fill the bladder. Maybe I just caught on quickly, but I did not filled the system pretty carelessly and made no mess at all. The locking mechanism (a fold and slide-seal deal) worked flawlessly for me. There were a few neutral notes that I noticed while using this for hikes/walks. The flow-rate modulation on the bite valve did work, but I never found myself setting it to anything less than "full" flow rate. Maybe I'm just a prodigious drinker. Also, that slide-seal locking clip would very rarely get "caught" and not close easily. It happened when the bladder was pretty full, and holding it up with one hand while trying to seal it with the other would "bend" the system enough so that I'd have to readjust the slide-seal a few times before it would attach correctly. I did not encounter any issues with the product. I generally try to avoid plastic touching food/drink, but did not encounter the off plastic-y taste that I often do. That may change with time, but so far so good.
Great features on this bladder!
Great size for my needs for both long or short hikes. The detachable drink hose is a great feature for times when you need to refill the bladder but don't want remove the hose from the bag. No issues with the top sealing/leaking and the included tether is nice so that you have one hand on the bag while refilling the bladder and don't have to worry about it falling to the ground. There is a magnet on the end of the drinking tube valve that clips to most backpack shoulder straps. Another great feature is the flexible plastic hand grip that allows you to open the full mouth with one hand, a necessity when holding a water filter with the other. The opposite side has a long hard plastic spine to keep the filled bladder in place while in your bag.
Trust the Fold - It Works
The fold-close design of the filler on this Osprey bladder is definitely very unorthodox. Most of us are used to a screw-close design, but Osprey has proven that it’s not a necessary design feature. Now that I’ve used it, I prefer the Osprey version. It’s just so easy to fill, especially if you want to fill it with ice cubes. The opening on my old Gregory bladder, which I absolutely dislike in every way possible, is too small and far down the bladder for ice cubes or even filling at the fridge water spout. The Osprey, however, is right at the top and makes filling a breeze. The big opening also makes it easy to clean. I also really like the detachable hose. This is especially useful when you already have the hose routed through the backpack and shoulder strap, yet you want to remove just the bladder. This bladder is very versatile, and I even use it in my golf bag. I really like this bladder, my wife has the first generation, and I really like the subtle updates they made for this generation.
Great Water Reservoir for Hiking and Backpacking
There are so many things to love about the Osprey Hydraulics Reservoir. At 3 liters, this is a great addition to my pack for longer hikes or trips where stopping to filter frequently can get tedious. It was incredibly easy to fill and seal and I felt confident knowing that I had fully closed it off and wouldn’t experience any leaking. I love that the water filling takes place at the top, vs. my previous reservoir, which was awkwardly placed on the front face and made filling or taking any amount of water out difficult. The Slide-Seal top is a great feature. I easily placed this into my Osprey 50L pack and it fit seamlessly. I appreciate that the plastic feels both durable and lightweight. The plastic frame keeps the reservoir upright and the water evenly distributed. I thought this was a game-changer when putting it in my pack and refilling it. There was no redistributing of water required. I also love the handle and appreciated how easy it made carrying, even with only one hand free. I am a huge fan of the magnetic attachment for the bite valve. This is genius and was easy to attach to the webbing on my pack. I love having a designated spot to clip my bite valve and not having to worry about looping it through webbing or trying to come up with a makeshift solution. The magnetic is strong and held it in place. The bite valve worked seamlessly and I felt I was consistently able to get a great stream of water. I love that I could open and close it easily with one hand. I also think that having the hose detach is clever. It allows you to refill the reservoir without removing the hose and also aids in making the cleaning process easier. I did notice a plastic taste, but this seems pretty expected and I know I can take measures to reduce this.
Bladder torn at handle attchement point.
First use and I felt water dripping down my back. I found a hole where the handle is bonded to the bladder. Its a failed design if this is bound to happen, especially brand new out of the box. Hydrapak beefed up the hose outlet with plenty of thick surrounding material for support. But where is the thick material to support the bladder wall at the handle attachment points? Many other customers out there have stated the same leak occuring.
Decent reservoir with some issues
For the most part, this reservoir has been good enough for me. I have not had the leaking issues that others have had and it's easy to fill and clean, at least the main chamber and tube attached to the bite valve have been. I have had two issues with it, though: first, the plastic used to open and close the valve broke off fairly early on. I glued it back on, and though it stayed mostly intact, part broke off again. I'm still able to open and close it, but it's something of a pain. My last reservoir, a Platypus, also had a cheap bite valve that I had to go and buy a blue and yellow Camelbak valve to replace. That one worked great and I wish I hadn't thrown it away. If I can find one that fits, I might put that design of valve onto this reservoir. The second issue is the tube that attaches directly to the reservoir. Needless to say, that thing is stubborn and it took quite a bit of pulling to finally get it off, to the point I thought I might break it off of the reservoir when trying to remove it for cleaning. Ultimately, these have been minor annoyances for a decent reservoir, but given the price, it would be nice if these weren't issues at all. Hopefully, they fix them in future designs, but if they don't, I may be leaning to another brand down the road.
Osprey 3L / 100oz Hydraulics Reservoir
I have used a 3L reservoir in my Camelbak Mule and Backpacks for many years during back country trips. I like the 3L as I have consumed 2L – 3L a day on long excursions. I have used these on Fishing, Hiking, Skiing, Hunting and other outdoor activities. I share this so you know I have a lot of experience with a product like this. Pros: • Backerplate: nice feature that does allow easy loading & unloading. Other reservoirs I have used did not have this feature which made it an effort to get the flimsy product into tight spaces. • Carry Handle: Bonus, it does provide a nice purchase for manipulating this reservoir. • It was very easy to slip this product into my Camelbak Mule! • Quick disconnect: The location is great, right at the top which allows easy insertion of the hose through the opening in a Camelback and Backpack (loop it through the straps for easy access). Other products, this is at the bottom of the reservoir which is useless. • Bonus: This product is PBA & PVC free Cons: • Slide-seal top & Pour Shield is small as compared to other products I have used. I am Neutral on the magnetic hose clip. I have always draped my hose through the straps I have on every backpack and Mule. It looks nice and may come in handy for securing it within closer reach vs the backpack strap.
Leaked Instantly
Had two of these reservoirs, replaced the first one because it was leaking on the right side where the hard plastic meets the reservoir immediately after coming home and filling. Replaced it with another and had the SAME LEAK! If it were one I think it would be fine, but the pattern is emerging.
Leaks badly straight out of the package!
Leaks badly straight out of the package! Bought it this morning and filled it with water to test it and wash it before the first use. Did not even move away from the sink, there was a large stream of water coming out from behind the handle. This is a defective product and should be recalled.