Peak Series 3L Gravity System

The LifeStraw Peak Series 3L Gravity System is a lightweight, compact filtration solution designed for flexible outdoor use. With a 3-litre capacity and fully leakproof construction, it provides a simple way to collect, filter, and store water whether you’re on the move or set up at camp.

The gravity-fed design makes it easy to use—just fill, hang, and let it filter—while the enhanced membrane microfilter is engineered to maintain strong flow and resist clogging from sand and silt. This ensures reliable performance across longer trips and varied environments.

Built from durable, premium materials, the storage bag is designed to withstand regular outdoor use without worrying about punctures or wear. The system is also highly versatile, allowing it to be used as a gravity filter, squeeze bottle, straw filter, or connected to a standard water bottle depending on your setup.

Filtration Performance

• Removes bacteria, parasites, microplastics, silt, sand, and cloudiness
• Re-engineered membrane improves flow rate and longevity
• Includes backwash capability to maintain performance
• Membrane microfilter lasts up to 2,000 litres (500 gallons)

Why Choose the Peak Series 3L System?

• Compact and lightweight for easy packing
• Versatile design adapts to multiple use cases
• Reliable filtration without batteries or pumping
• Suitable for both moving and static setups
• Durable build for repeated outdoor use

Ideal For

• Camping and hiking
• Bushcraft and outdoor use
• Travel and lightweight setups
• Emergency preparedness kits
• Solo users or small groups

Returns Policy

If you are not completely satisfied with your items then you can return them to Sgt Prepper Shop within 30 days of delivery. Damaged items or faults need to be reported within 48hrs of delivery.

Please return to:
Sgt Prepper Shop
10 California
Witton Park
Bishop Auckland
DL14 0DR

Please include a note with your order number and the reason for returning each item.

Shipping

We ship to virtually any address in the UK, with all orders currently sent via Royal Mail.

Orders over £80 qualify for free standard delivery. For orders under £80, a flat £4.95 shipping fee applies.

We aim to deliver your item within 2–4 working days, and once your order is placed, we’ll provide an estimated delivery date based on stock availability and your selected shipping option.

IMPORTANT

As of 6th April 2022, if you have bought an age restricted item such as a knife or an axe, your delivery driver will require you to show ID as proof of age as per The Offensive Weapon Act 2019.