55L Fresh Water Tank Kit (Backfill System) - Mercedes Sprinter (RWD 2006–Present)

This 55 litre underfloor fresh water tank kit (Backfill System) is engineered for the Mercedes Sprinter RWD (2006–present).
The backfill configuration fills the tank via your interior cold-water line, making it ideal for stealth builds or vans where you want a clean exterior with no visible filler cap.

The tank sits neatly along the driver’s-side sill behind the exhaust, utilising the deeper RWD sill cavity for a secure and space-efficient installation.

What’s Included (Backfill Kit)

1 × 55L Fresh Water Tank (1140 × 300 × 175 mm)

1 × ½" Elbow (breather connection)

2 × ½" Straight Connectors (for the blue feed pipe)

1 × 1m Length of ½" Breather Pipe

1 × 2m Length of ½" Blue Flexible Water Pipe

1 × Backfill Point with Integrated Isolator Valve

4 × Jubilee Clips

1 × Universal Tank Strap Mounting Kit & Fixings

A fully supplied, ready-to-install fresh backfill system.

Locating Instructions — Sprinter RWD (Backfill)

Installs lengthwise along the driver’s-side outer sill, positioned behind the RWD exhaust box.

Backfill line connects to the internal cold-water plumbing through the supplied isolation valve.

Breather hose must be routed upward through the floor to prevent siphon effects.

Ensure clearance from exhaust routing, heat shielding, brake lines and wiring harnesses.

Important Information

Works with optional Victron/SRNE-compatible water-level sensors.

Tank is leak-tested; minor moisture at arrival is normal.

Clean thoroughly before storing drinking water.

Specifications

Capacity: 55 litres

Dimensions: 1140 × 300 × 175 mm

Material: Rotomoulded polyethylene