Sprinter Undermount Water Tank (17 Gallon)

Curious Campervans Sprinter Undermount Water Tank – 17 Gallons

Expand your van’s water capacity without sacrificing interior storage with the Curious Campervans 17 Gallon Sprinter Undermount Water Tank. Designed to mount beneath Mercedes-Benz Sprinter vans, this low-profile solution adds freshwater or grey water storage while preserving valuable interior living space.

Manufactured from food-grade, BPA-free linear low-density polyethylene (LLDPE) and approved for potable water use in Canada, this tank is built to handle long-term outdoor exposure and off-grid travel.

Features

• Custom-fit for Mercedes-Benz Sprinter vans (all wheelbases)
• Driver-side undermount installation preserves interior storage
• Low-profile design helps maintain ground clearance
• Suitable for fresh water or grey water systems
• Can also be installed as an interior tank in most van conversions
• Food-grade, BPA-free construction
• Compatible with KUS S5U Water Level Sender
• Optional fittings and mounting kits available
• Compatible with wheel well tank systems for expanded capacity

Specifications

• Capacity: 17 US gal / 64.3 L
• Dimensions (L × W × H): 41" × 11.5" × 8.5"
• Material: Linear low-density polyethylene (LLDPE)
• Certification: Food-grade / BPA-free / CSA approved
• Installation Position: Driver side only
• Thread Type: Female NPT

Ports & Connections

• 1 × 1½" drill-out membrane port (top)
• 2 × 1¼" drill-out membrane ports (top and end)
• 1 × ¾" port
• 2 × ½" ports
• Membrane ports only require drilling if used

Available Add-On Kits

• Grey Water Fittings Kit
• Fresh Water Fittings Kit
• Aluminum Strapping Kit
• Water Level Sender & Gauge Kit

Fresh Water Fittings Kit Includes

• 1 × 1¼" PVC 90°
• 2 × ¾" PVC 90°
• 1 × ¾" PVC ball valve
• 3 × PVC nipples (6", 4", 1½")
• 1 × ½" poly adaptor
• 2 × ½" poly elbows
• Fill port
• Hose clamps
• Teflon tape
• 5 ft fill hose
• 5 ft ⅝" ID vinyl hose

Grey Water Fittings Kit Includes

• 1 × 1¼" PVC 90°
• 2 × ¾" PVC 90°
• 1 × ¾" PVC ball valve
• 3 × PVC nipples (6", 4", 1½")
• 1 × ½" poly adaptor
• 1 × ½" poly elbow
• 1 × ½" PVC plug
• Hose clamps
• Teflon tape
• 5 ft fill hose
• 2 ft ⅝" ID vinyl hose

Aluminum Strapping Kit Includes

• 2 × heavy-duty aluminum mounting straps
• Aluminum mounting hardware

How It Works / Installation Overview

The tank mounts underneath the driver-side chassis area of compatible Sprinter vans using mounting straps, creating additional water storage outside the living area while maximizing usable interior space.

The connection side of the tank is typically oriented toward the rear for easier plumbing access but can be installed in either direction depending on build requirements.

Compatibility

• Compatible with Mercedes-Benz Sprinter vans (all wheelbases)
• Compatible with fresh water and grey water systems
• Compatible as an interior water tank for most vans
• Compatible with 29 Gallon Sprinter Wheel Well Water Tank
• Compatible with 32 Gallon Sprinter Dually Wheel Well Water Tank
• Compatible with KUS Water Level Sensors and Gauges
• T1N compatibility not officially verified — confirm available undercarriage space before installation