40 Litre Underfloor Fresh Water Tank (Topfill) for Ford Transit Custom (2012–2022, L1 & L2)

This 40-litre underfloor fresh water tank has been purpose-designed for the 2012–2022 Ford Transit Custom L1 and L2 models. Ideal for campervan and motorhome conversions, it provides a reliable and discreet fresh water supply without taking up valuable interior space.

Constructed from high-grade, corrosion-resistant polyethylene, the tank features a matt black finish for a low-visibility, long-lasting installation. Its hygienic, algae-resistant design ensures dependable performance for long-term builds.

A large threaded top access hatch allows installation of pumps, sensors or internal hardware, while providing convenient access for periodic cleaning.

Water level senders are also available, including compatible options for Victron Energy and SRNE systems.

Fitting Instructions

This tank installs widthways (driver side to passenger side) within the underfloor cavity of the Ford Transit Custom, positioned between the rear chassis members.

The service hatch must face upwards, and the tank’s profile ensures clearance around factory brake lines and underfloor components on both L1 and L2 models.

What’s Included

1 × 40L Water Tank
(Approx. dimensions: 850mm (L) × 370mm (W) × 150mm (H))

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

1 × 1/2" Straight fitting for connection to your water pump

1 × 1½" (40mm) Elbow for connecting the large blue inlet pipe

1 × 1m long 1/2" Breather Pipe

1 × 1m long 40mm Blue Flexible Inlet Pipe

1 × Black Filler Neck with locking cap & 2 keys

3 × Jubilee Clips for securing smaller pipes

2 × 40mm Wire Clips for securing the large inlet pipe

1 × Universal Tank/Strap Fitting Kit with fixings

Important Information

Tanks may contain traces of water due to factory leak-testing—this is completely normal.

Ensure the tank is fully cleaned before first use.

Specifications

Capacity: 40 litres

Dimensions: 850mm (L) × 370mm (W) × 150mm (H)

Dry Weight: approx. 3.5kg