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Sprinter Camper Van Freshwater and Gray Water Tanks

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Sprinter Camper Van Freshwater and Gray Water Tanks

#plumbing#hardware#tools
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This bundle provides essential components for setting up a freshwater and gray water system in a Sprinter camper van. It includes tanks, pump, tubing, and an inlet hatch, catering to self-sufficient travel needs. The products help ensure a reliable water supply and waste management solution for life on the road.

Curated by The Shelf Curator · Updated June 2026

Built for Sprinter and Transit conversion builders who need to optimize internal volume without compromising water capacity. Not for full-scale RVs—this shop focuses on space-saving plumbing components for narrow-body van layouts.

Curator's pick: 20 Gallon Wheel Well Water Tank

This tank design uses the dead space around the rear wheel arch, which is typically wasted in a van layout, allowing for a 20-gallon reserve while keeping the center of gravity low and the living area clear. Its heavy-duty polyethylene construction is less prone to puncture than standard rectangular tanks when anchored against raw metal van ribs.

⚠ Worth knowing: Undermount grey water tanks require high-clearance mounting brackets and heat tape if staying in sub-freezing temperatures, as the external placement leaves valves vulnerable to road debris and icing. PEX tubing is rigid; tight radius turns in van cabinets usually require 90-degree elbows rather than simple bending to prevent stress fractures at the fittings.

Van conversion chassis prep and insulationOff-grid 12V electrical systems for mobile buildsModular galley and cabinetry hardware

This shop is built from essential components for creating a self-sufficient water system within a Sprinter van. It focuses on maximizing space efficiency while ensuring reliable freshwater delivery and gray water management during road travel.

This guide is for Sprinter van owners building out their camper for independent travel and living. It's designed for those who need a robust and integrated plumbing solution, ensuring access to water for daily needs without relying on external hookups.

To get started, focus on the tanks and pump for core functionality. A basic setup can range from $330-$530, while a full, integrated system with all components will cost between $382-$635.

Full build

$382–$635

Starter

$330–$530

Tanks + Pump Essentials

Best forDIY Van BuildsOff-Grid LivingSprinter VansWater AutonomySpace Maximization

20 Gallon Wheel Well Water Tank

Match 95%

Northwest Conversions

Plumbing$200-$300

This wheel well water tank, typically 20 gallons, is designed to fit over a Sprinter van's wheel well, maximizing usable interior space. It stores freshwater for drinking, cooking, and washing, ideal for compact van builds.

  • 20 Gallon capacity
  • HDPE Plastic construction
  • Fits over wheel well
  • Integrated baffles
  • Multiple port locations

In this shop: This product aligns with the 'Sprinter Camper Van Freshwater and Gray Water Tanks' vibe by offering a space-saving solution for water storage in a van conversion.

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15 Gallon Undermount Grey Water Tank

Match 92%

Class A Customs

Plumbing$80-$150

A 15-gallon undermount tank, this unit is installed beneath the van to collect gray water from sinks and showers. It helps manage waste liquids safely and efficiently, keeping the van's interior clean.

  • 15 Gallon capacity
  • Rotomolded polyethylene
  • Undermount installation
  • Inlet/outlet ports included
  • UV resistant

In this shop: This tank is included as it provides a practical grey water collection method, crucial for a functional 'Sprinter Camper Van Freshwater and Gray Water Tanks' setup.

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SeaFlo 12V Water Pressure Diaphragm Pump

Match 98%

SeaFlo

Plumbing$50-$80

The SeaFlo 12V Water Pressure Diaphragm Pump delivers consistent water pressure for faucets and showers in a van. This 12-volt pump automatically turns on and off with water demand, providing a reliable water supply.

  • 12V DC power
  • 3.0 GPM flow rate
  • 45 PSI pressure switch
  • Self-priming
  • Quiet operation

In this shop: This pump is key to the 'Sprinter Camper Van Freshwater and Gray Water Tanks' theme, as it enables the practical use of stored water under pressure.

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Braided Vinyl Reinforced Flexible Tubing

Match 90%

Generic

Plumbing$15-$30

Braided Vinyl Reinforced Flexible Tubing is used for connecting various plumbing components in a freshwater system. Its flexibility and reinforcement make it durable and easy to route in tight spaces within a van.

  • Clear PVC material
  • Braided reinforcement
  • Flexible, kink resistant
  • Potable water safe
  • Up to 150 PSI

In this shop: This tubing is included because it provides the necessary flexible connections, essential for integrating the various components of a 'Sprinter Camper Van Freshwater and Gray Water Tanks' system.

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Stainless Steel Water Inlet Hatch

Match 94%

JR Products

Hardware$25-$50

This stainless steel water inlet hatch provides an external port for filling the van's freshwater tank. It offers a secure and clean way to replenish water supplies from an external hose source.

  • Stainless steel construction
  • Lockable cap
  • Gravity fill connection
  • Vent hose connection
  • Weather sealed

In this shop: This product supports the 'Sprinter Camper Van Freshwater and Gray Water Tanks' theme by offering a secure and convenient external fill point for the freshwater system.

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PEX Pipe Tubing Cutter

Match 88%

SharkBite

Tools$12-$25

The PEX Pipe Tubing Cutter is a hand tool designed for clean and precise cuts on PEX, PVC, and other plastic tubing. It ensures proper fitment for plumbing connections, preventing leaks.

  • Sharp stainless steel blade
  • Ratchet cutting mechanism
  • For PEX, PVC, PP, PE
  • Up to 1 inch diameter
  • Ergonomic handle

In this shop: This tool is essential for anyone installing a 'Sprinter Camper Van Freshwater and Gray Water Tanks' system, as it ensures proper tubing preparation.

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What works

  • The integrated tank system efficiently utilizes the van's interior and exterior space, providing substantial water storage without sacrificing living areas.
  • This system ensures reliable water pressure for all your needs, from sinks to showers, thanks to the automatic 12V diaphragm pump.
  • Managing both freshwater supply and gray water disposal becomes straightforward and hygienic, supporting longer trips away from developed facilities.

What to know

  • Initial installation can be complex, requiring careful planning and precise measurement to correctly route tubing and mount tanks in tight spaces.
  • The capacity of the tanks, while efficient for space, might require more frequent refilling or emptying for prolonged, high-usage trips.

How to use this together

  1. 1

    Install Tanks First

    Begin by installing the 20 Gallon Wheel Well Water Tank over the wheel well and the 15 Gallon Undermount Grey Water Tank beneath the van. This establishes your primary water storage and waste collection points, dictating the layout for subsequent plumbing.

  2. 2

    Connect the Water Pump

    Mount the SeaFlo 12V Water Pressure Diaphragm Pump near the freshwater tank. Connect the pump's inlet to the freshwater tank and its outlet to the rest of your plumbing system using the Braided Vinyl Reinforced Flexible Tubing. This ensures consistent water flow to your fixtures.

  3. 3

    Route Plumbing Lines

    Use the Braided Vinyl Reinforced Flexible Tubing and the PEX Pipe Tubing Cutter to run lines from the pump to your faucets and shower, and from your drains to the gray water tank. Ensure all connections are secure and cut tubing to precise lengths to prevent leaks and maximize water pressure.

  4. 4

    Install Water Inlet Hatch

    Cut a hole in the van's exterior using appropriate tools and securely install the Stainless Steel Water Inlet Hatch. Connect it to the freshwater tank with tubing. This provides a convenient and secure external point for refilling your freshwater supply.

Frequently asked questions