This bundle provides the core components for building a comprehensive water system in a Ram ProMaster camper van. It includes everything needed for water storage, distribution, heating, and hygiene, suitable for those seeking the convenience of home-like water access on the road. The products support hot showers and a functional sink, enhancing off-grid capabilities for extended travel.
Curated by The Field Editor · Updated June 2026
Built for ProMaster owners aiming for a full-time residential layout with consistent hot water and pressurized flow. Not for weekenders with portable jugs — this shop focuses on permanent, hard-plumbed internals that require chassis mounting.
Curator's pick: Accumulator Tank for Water System
This is the most critical component for preventing pump cycling and ensuring a steady flow at low volume, which significantly extends the lifespan of the 12V diaphragm pump by reducing constant motor fatigue. Unlike systems that rely on the pump alone, adding an accumulator creates a pressurized buffer that mimics the stability of a standard home faucet.
⚠ Worth knowing: Using a 4-gallon electric heater in a 12V environment creates a massive draw on the battery bank, often requiring a dedicated high-capacity lithium system or a DC-to-AC inverter that can handle the sustained wattage. Without a high-output charging source, this setup will deplete moderate solar configurations in a single shower cycle.
High-Amperage Lithium Power Systems for Off-Grid VansUnder-Mount Grey Water Tanks and Drainage PlumbingLow-Profile 12V Roof Ventilation and Humidity Control
This comprehensive water system bundle is inspired by the need for home-like water access in a Ram ProMaster 2500 camper van, providing all core components from storage to hot showers. It addresses the challenges of off-grid living by offering solutions for water storage, distribution, heating, and hygiene.
This setup is ideal for serious DIY van builders and full-time or extended-travel nomads who prioritize convenience and self-sufficiency. It's perfect for anyone wanting the comfort of hot water for showers and a fully functional kitchen sink in their mobile home.
To get started with basic pressurized water, focus on the Water Tank, Pressure Pump, and PEX Installation Kit. A full build, including hot water and an outdoor shower, ranges from $790 to $1520.
Full build
$790–$1520
Starter
$320–$670
Tank + Pump + PEX
Best forVan Life EnthusiastsOff-Grid LivingDIY Camper BuildersExtended TravelComfort Seekers
This is a custom-fit water tank designed for the Ram ProMaster 2500, intended for fresh or grey water storage. It provides a dedicated solution for carrying a significant volume of water in a camper van build. This product is for DIY van builders needing a reliable foundation for their water system.
Vehicle-specific fit for Ram ProMaster
Durable, food-grade plastic construction
Various capacity options available
Designed for under-chassis or interior mounting
In this shop: This water tank is crucial for establishing the core water supply, directly enabling the 'Camper Van Water System Components for Ram ProMaster' vibe by providing the foundation for on-board water.
This 12V diaphragm pump creates consistent water pressure for camper van sinks and showers. It's designed to deliver water on demand from a tank, making it suitable for both fresh and grey water applications. This product solves the problem of needing pressurized water in an off-grid or mobile setting.
12V DC power operation
Self-priming capability
Built-in pressure switch
Corrosion-resistant materials
In this shop: This 12V water pump ensures reliable water delivery throughout the system, aligning with the 'Camper Van Water System Components for Ram ProMaster' vibe by providing essential functionality for daily water use.
This compact electric mini-tank water heater provides a small volume of hot water for sinks and showers. It is an energy-efficient option for camper vans, heating water only when needed. This product is for those who desire the comfort of hot water in their mobile dwelling without requiring a large, complex system.
4-gallon capacity
120V AC electric power
Compact, space-saving design
Quick recovery time
In this shop: An electric mini-tank water heater directly addresses the 'Hot Showers' aspect of the Ram ProMaster water system, central to the camper van comfort vibe.
This deep, single-bowl stainless steel kitchen sink is designed for durability and functionality in a mobile kitchen. It provides a practical basin for washing dishes, preparing food, and other galley tasks. This product is for camper van builders seeking a robust and hygienic sink solution for their on-the-road living.
High-grade stainless steel
Single, deep basin design
Resistant to rust and corrosion
Easy to clean surface
In this shop: This stainless steel sink is a practical addition that supports the 'Camper Van Water System Components for Ram ProMaster' vibe by enabling a functional, permanent galley area.
This PEX tubing installation kit includes tubing, fittings, and a crimp tool for setting up flexible and reliable water lines. It provides the necessary materials and specialized tools to connect various plumbing components in a camper van. This product is for DIY builders looking to complete their water system with secure and leak-proof connections.
Flexible PEX tubing
Assorted crimp fittings
Manual crimp tool included
Resistant to freezing and bursts
In this shop: This PEX tubing installation kit is essential for creating the connections that bring the entire 'Camper Van Water System Components for Ram ProMaster' together, ensuring a working system.
An accumulator tank for a water system helps maintain consistent water pressure and reduces the frequency of pump cycling. It smooths water flow from 12V pumps, which extends pump life and conserves battery power. This product is for anyone looking to optimize their camper van's pressurized water system.
Small pressurized reservoir
Reduces pump cycling
Maintains consistent water flow
Prolongs pump lifespan
In this shop: This accumulator tank enhances the performance of the water system, aligning with the 'Camper Van Water System Components for Ram ProMaster' vibe by contributing to a more efficient and comfortable user experience.
This inline RV water filter system removes sediment, chlorine, and other contaminants from incoming water sources. It ensures that clean water enters your camper van's fresh water tank and plumbing system. This product is for those who want to improve the safety and taste of their potable water while traveling.
Single-stage filtration
Removes sediment and chlorine
Connects to standard hoses
Replaceable filter cartridge
In this shop: This inline water filter system supports a healthy and safe water supply, directly contributing to the comfortable living aspect of the 'Camper Van Water System Components for Ram ProMaster' vibe.
This outdoor RV shower box kit provides a convenient way to shower outside the camper van. It typically includes a shower head, hose, and a lockable enclosure for wall mounting. This product is for van owners who want to wash off outdoors, conserving interior space and managing moisture.
Enclosed outdoor access
Adjustable shower head
Coiled hose included
Lockable door
In this shop: This outdoor RV shower box directly enables the 'Hot Showers' functionality outside the vehicle, perfectly fitting the 'Camper Van Water System Components for Ram ProMaster' vibe by adding practical outdoor utility.
Enjoy the comfort and convenience of hot water for showers and dishes, significantly enhancing the quality of van life.
Achieve full independence with comprehensive water storage, filtration, and pressurized delivery for all your needs.
The modular nature of these components allows for a customized and adaptable water system tailored to your specific van layout.
What to know
The initial installation requires significant DIY effort and understanding of plumbing, which can be time-consuming for beginners.
Integrating all components requires careful planning for space, power consumption, and water management, particularly for the hot water heater.
How to use this together
1
Install Water Storage
Begin by securely mounting the Ram ProMaster 2500 Camper Van Water Tank in its designated location. This should be the first step as the tank's position dictates the layout for all subsequent plumbing connections and component placements, ensuring optimal weight distribution and accessibility.
2
Establish Water Delivery
Next, connect the 12V Water Pressure Diaphragm Pump and the Accumulator Tank for Water System to the water tank exit. The accumulator tank is crucial here as it will smooth out water flow and reduce pump cycling, extending the pump's life and conserving battery power. Follow this with the Inline RV Water Filter System to ensure clean water starts flowing.
3
Install Hot Water & Sink
Now, plumb in the 4 Gallon Electric Mini Tank Water Heater to provide hot water to the Deep Single Bowl Stainless Steel Kitchen Sink. Consider the proximity of the water heater to the sink to minimize hot water travel distance. Use the PEX Tubing Installation Kit to make all necessary connections to the pump and water heater, ensuring secure, leak-free lines for both hot and cold water.
4
Add Outdoor Shower
Finally, integrate the Outdoor RV Shower Box Kit, connecting it to your cold or mixed water lines depending on desired outdoor shower temperature. This step is completed after the main system is in place, as it draws from the established water supply and simply adds an extra point of use, often on the exterior of the van for convenience.
