Select Your Country
- NEW Pay in 3 Easy Payments with Klarna
- Free Delivery on Orders over £50*
- 100% Secure Payments
- All Mighty Guarantee Included
Hydraulics™ 3L Reservoir
Unisex Hydration
3L BPA free water reservoir
Free delivery on orders over £50 
All Mighty Guarantee Included 
Free Delivery on Orders Over £50
Free Delivery on Orders Over £50
- Order before 15.00 GMT for delivery in 2-6 business days
- 30-Day Returns policy
All Mighty Guarantee Included
All Mighty Guarantee Included
At Osprey we only design and build high-quality products. That’s why all our products are covered under our All Mighty Guarantee.
Weight: 0.2KG
Dimensions (CM): 39L / 18W / 8D
Fabric: TPU Film
Providing maximum levels of stability and ease of use, the Hydraulics™ reservoir is essential for keeping hydrated on your outdoor adventures. The unique combination of the pour shield and Slide-Seal™ top-opening allows you to easily fill and empty the reservoir, whilst enabling complete access for cleaning after use. Our unique Osprey Hydraulics™ anatomically shaped back plate provides stability and creates a flat profile to ensure the reservoir easily slides in and out of your pack. The bite valve is magnetic enabling easy stow and access to water on the go. When not in use the bite valve also incorporates an easy on/off twist lock system. Built from strong yet light TPU material, which is designed to withstand either freezing or hot water. The QuickConnect™ system allows you to remove the reservoir for easier loading, replacement and cleaning.
*Magnets may cause compass deviation. Always keep your compass and magnetic bite-valve separate.
Weight: 0.2 kg
Dimensions (CM): 39L / 18W / 8D
Fabric: TPU Film
Features
- Anatomically shaped Hydraulics™ Reservoir
- Removable and replaceable hose and bite valve
- Litre markings printed on reservoir body
- Slide-seal™ top opening for easy filling and cleaning
- Pour shield extends the collar for easy filling
- Carry handle allows easy reservoir management and filling
- Bite Valve offers fast, smooth water delivery
- Made from a tough durable TPU material
Frequently Asked Questions
Ask Your Question
-
très bon produittrès bon produit je recommande
Date:
-
Good ProductI used the water bag on one week walking tour and it served very well. I followed the suggestion of the manufacturer and had the bag filled with lemon water and put it in the freezer. Afterward I did not notice any plastic taste. The only comment for improvement have is the adjustment in the Osprey backpack. There is only a very short and tiny band inside the backpack to put around the handle to hold that the water bag. If the holding band would be longer and adjustable in length, one would easier fit it in.
Date:
-
This is an excellent product.This is an excellent product. I bought a similar one that was cheaper, however it was highly inferior. My view is it costs more than others for a reason, and it delivers really well on simplicity to use and durability
Date:
-
Great addition to my walking equipmentIts a hydration bag, it does the job, fits into my osprey pack,o dd taste has gone. Once i worked out the magnet attaches to the chest strap the convenience of this became all to obvious, not much more i can say. Sure there are cheaper options around but you get what you pay for, i think its worth a few extra pounds.
Date:
-
Bad tasteOver the past few years I have purchased numerous Osprey products: 6 backpacks ranging from a Viper 13 to a Shuttle 100, wash bags, dry sacks and several of the hydraulics products.
I have nothing but high praise for all of the Osprey products apart from the hydraulic packs. EVERY single one of the new line I've purchased makes water taste really bad - rancid in fact. I've purchased 4 of these, each time trying a different type in the hope that the next will be fine - to no avail. (On the flip side, build quality of all have been exceptional as always with Osprey products)
I've tried washing/cleaning; freezing for 48 hours filled with water; freezing for 48 hours with water and lemon juice but NOTHING has worked.
The only one that didn't turn the water rancid was the older blue 3l pack with the screw down lid which unfortunately I've had to stop using due to the lid leaking from normal wear and tear.
It disappoints me, as a very loyal Osprey customer, that I will have to look elsewhere for a hydration pack for hiking and cycling - something I do a lot of.
Date:
-
Excellent water reservoirI recently bought a 3Litre reservoir to fit my Atmos AG and its fantastic! I love the way it has its own pouch in the bag and that the tube can come through. The magnetic sternum clip is brilliant. 10/10 Would recommend.
Date:
-
GreatI bought this and tested it and it does what it is supposed to do with aplomb. I then bought the insulated hose to use instead of the existing one but cannot figure out how to attach it to the bladder. The existing hose has an attachment that slots into the bladder but the insulated hose has no such attachment and the one on the existing hose does not appear removable in order to reattach to the insulated hose. Please advise. Thanks.
Date:
-
ok so farnot been tryed out yet ,so cant give a honest review as it was fior my son not me and he is in armed forces...
Date:
-
ok so fargood service good quality not been tried out yet as son away for few mths
Date:
-
Hopeless - 3 have split and failed in the same place3l used for mountain biking and the first reservoir split at the bottom after a few months. The replacement lasted a few months and then split in the same place. I asked Osprey to send me a new design as clearly they have a design and or manufacturing fault. They sent me a 3rd replacement which looked the same as all the others and after a few months this one has split in exactly the same place. So in summary 3 reservoirs have all split in the same place - they are hopeless and I suggest you buy from another maker. The rucksack part looks well made but the water bladder is quite useless and seemingly Osprey are still selling the same design whilst knowing of its failures - not a way to build trust or a good brand.
Date:
