Platypus GravityWorks replacement water reservoir kit, 4.0 Liter, dual-layer laminate, quick-disconnect fittings

The Platypus GravityWorks Replacement Water Reservoir Kit (4.0 L) replaces worn reservoirs or adds capacity to a GravityWorks system quickly and reliably.

The 4.0 liter Platypus GravityWorks replacement kit supplies both the dirty and clean reservoirs with the manufacturer’s quick-disconnect fittings and dual-layer laminate construction. Designed to slide directly into the GravityWorks system, this 15 x 8 inch reservoir balances lightweight packability with durable, taste-free materials. Made in the USA and backed by a limited lifetime warranty, it’s a practical spare or upgrade for backpackers, car campers, and emergency kits.

How does this replacement reservoir fit into my existing GravityWorks setup?

The 4.0 L reservoir is built to interface with GravityWorks filter housings using the same quick-disconnect connectors as the original system. Installation requires no tools: unclip the old reservoir and attach the replacement dirty and clean bags. The kit maintains the flow rates and hose routing expected of GravityWorks systems.

• Quick-disconnect fittings match GravityWorks connectors for tool-free swap
• Dirty and clean reservoirs included for immediate use
• Same hose length and routing as original system for compatibility

What materials and construction protect water taste and durability?

Platypus uses a dual-layer laminate that pairs a rugged outer film with a smooth, taste-free inner layer. The inner layer resists imparting odors or flavors to stored water while the outer layer tolerates abrasion and repeated packing. Seams and fittings are designed to withstand routine bending and hanging when filtering by gravity.

• Dual-layer laminate: durable exterior with taste-neutral interior
• Welded seams and reinforced fittings for repeated use
• Materials chosen to minimize plastic taste during storage

How portable and packable is the 4.0 L replacement reservoir?

Measuring 15 x 8 inches and weighing about 6 ounces, the 4.0 L reservoir packs down small when empty and slips into top lids or side pockets easily. Its supple construction keeps bulk low compared with rigid containers, and it balances capacity with manageable weight for multi-day use. Bringing an extra reservoir adds convenience without a major pack penalty.

• Compact dimensions when empty for efficient packing
• Lightweight: approximately 6 ounces for low pack weight impact
• Collapsible design nests with other soft gear in your pack

What warranty and origin details should I know before buying?

This kit is manufactured in the USA and comes with Platypus’s limited lifetime warranty, covering manufacturing defects under normal use. Warranty terms focus on defects rather than wear from heavy abrasion or misuse. If your system shows fitting or seam failures under normal conditions, Platypus customer support can advise on replacement or warranty service.

• Manufactured in the USA for consistent quality control
• Limited lifetime warranty addresses manufacturing defects
• Customer support available for warranty inquiries and part matching

Who is this for: The Platypus GravityWorks Replacement Water Reservoir Kit (4.0 L) is aimed at hikers, backcountry groups, overlanders, and preparedness-minded users who need a direct, reliable spare or a mid-size capacity upgrade for an existing GravityWorks filtration system. It’s especially useful if you want a balance of capacity and packability, prefer taste-neutral storage material, or need a factory-compatible replacement without modifying hoses or connectors.