75L Underslung Fresh Water Tank & Top Fill Kit – Ducato Relay Boxer 06–26

💧🚐 This 75 litre underfloor water tank has been purpose-designed for the L2, L3, and L4 models of the Fiat Ducato, Citroën Relay and Peugeot Boxer (>2006–2026). Suitable for use as a fresh water supply tank, it is ideal for campervan and motorhome conversions.

Manufactured from durable, corrosion-resistant polyethylene, the tank features a matt black finish for a discreet and long-lasting underfloor installation. Its hygienic, algae-resistant construction ensures reliability for long-term van builds.

A large threaded access hatch is fitted on the top of the tank, allowing the installation of pumps, internal accessories or sensors, and providing access for periodic cleaning.

Water level senders are also available, including models compatible with Victron & SRNE systems (Click Here)

Fitting Instructions

This tank installs widthways (driver side to passenger side) in the cavity between the two chassis members, located directly behind the exhaust silencer.
The service hatch must face upward, with the corner cut-out positioned around the handbrake cable.

Due to the handbrake cable location:

L2/L3 models can fit one 75L tank underneath

XLWB / L4 models can fit two tanks, provided no aftermarket modifications occupy the mounting space

What’s Included-

1 × 75L Water Tank (L: 1000mm, W: 300mm, D: 225mm)

1 × 1/2" Elbow for attaching the breather pipe

1 × 1/2" Straight for connecting to your water pump

1 x 1.1/2" (40mm) Elbow for connecting the large blue inlet pipe

1 × 1m long 1/2" Breather Pipe

1 × 1m long 40mm blue flexible inlet water pipe

1 × Black Filler neck with locking cap & 2 keys

3 x Jubillee clips to secure the smaller pipes

2 x 40mm wire clips to secure the 40mm pipe

1 x Universal tank/strap fitting kit & fixings

⚠️ Important Information

Tank may contain traces of water on arrival—this is normal due to leak testing.

Please ensure the tank is fully cleaned before use.

📏 Specifications

Capacity: 75 litres

Dimensions: 1000mm (L) × 300mm (W) × 225mm (H)

Dry Weight: 5.40kg