Marine & RV Water Filtration Systems

Pure water solutions for mobile living. Compact, efficient filtration for boats, yachts, RVs, and motorhomes. Fresh water on demand, no matter where your journey takes you.

Benefits for Mobile Applications

Water quality matters on the water. Our compact filtration systems provide clean, fresh drinking and utility water for boats, yachts, RVs, and motorhomes.

Safe Drinking Water

Remove bacteria, viruses, and contaminants from any water source. Enjoy clean drinking water whether you're docked or anchored.

Compact Design

Purpose-built systems that fit tight spaces. Save valuable deck, cabin, or living space with minimal footprint filtration.

Reduce Tank Odors

Eliminate sulfur smells and musty odors in water tanks. Fresh-smelling water for cooking, drinking, and showering.

Saltwater to Freshwater

Desalination options available. Convert ocean water to drinking water for extended cruising without refueling water tanks.

Low Maintenance

Filter changes only once or twice per year. No complicated service calls at remote locations. Simple filter replacement.

Energy Efficient

Designed for mobile power systems. Low energy consumption works with marine 12V/24V systems or standard RV power.

Compact Filtration Systems

Space-efficient water purification engineered for boats, yachts, RVs, and motorhomes.

Multi-Stage Filtration

What's Removed:

  • Sediment and particles
  • Chlorine and chemicals
  • Bacteria and microorganisms
  • Tastes and odors
  • Heavy metals
  • Saltwater impurities

Professional Installation

  • Connect to existing water lines
  • Expert technician setup
  • Professional installation available
  • Nationwide installer network
  • Works with most water systems
  • Weatherproof housing

Perfect for Mobile Life

  • Minimal weight and size
  • Vibration resistant
  • Works in all climates
  • Salt-spray resistant
  • Portable models available
  • No electricity required (most models)

Featured Marine & RV Products

Choose the perfect compact filtration system for your vessel or RV.

Most Popular
Compact Dual System

Compact Dual System

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Best For: Dual-system boats, small yachts, RVs with higher water use

Space Required: Under 2 cubic feet

Key Features:

  • Dual-filtration technology
  • High flow rate capability
  • Works with any water source
  • 50+ gallon daily capacity
  • Pressure-rated housing
  • Extended filter life
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Compact System

Compact System

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Best For: Small boats, sailboats, travel trailers, portable needs

Space Required: Ultra-compact, under 1 cubic foot

Key Features:

  • Ultra-portable design
  • Single-stage filtration
  • Easy to carry
  • Lightweight construction
  • Quick-connect fittings
  • Affordable maintenance
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Ultimate Purified Marine

Ultimate Purified Marine

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Best For: Luxury yachts, large RVs, extended cruising, maximum purity

Space Required: 2-3 cubic feet

Key Features:

  • Multi-stage RO purification
  • Highest purity levels
  • Hydrogen infusion option
  • Marine-grade materials
  • Premium filtration
  • Extended filter cartridges
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Marine Desalination System

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Coming Soon: Convert saltwater to fresh drinking water

Features:

  • Advanced desalination
  • Ocean to drinking water
  • Extended cruising capability
  • Marine-certified technology
  • Custom installation
  • Professional support
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Not sure which system fits your vessel or RV?

Our marine water specialists understand the unique challenges of mobile applications.

Get Expert Recommendation

Space-Efficient Design for Tight Spaces

Every inch counts on a boat or RV. Our compact systems maximize water quality while minimizing footprint.

Under-Cabinet Installation

Fits neatly under galley sinks and RV kitchenettes. Takes up no counter or deck space.

Advantages:

  • Hidden installation
  • Dedicated faucet option
  • Easy access for filter changes
  • Professional appearance
  • Separate from existing plumbing

In-Line Installation

Integrates directly into existing water lines. Filters all water or specific circuits.

Advantages:

  • Zero additional space
  • Inline with existing pipes
  • Whole-system or point-of-use options
  • Easy maintenance access
  • No counter modifications

Portable/Portable Filtration

Take it with you or keep it stored. Perfect for those who relocate frequently.

Advantages:

  • Ultra-lightweight
  • Quick-connect systems
  • No permanent installation
  • Move between vessels/RVs
  • Travel-friendly design

External Tank/Mounting

Mount on exterior surfaces. Ideal for systems requiring larger capacity or desalination.

Advantages:

  • Preserves interior space
  • Stainless steel construction
  • Weather and UV resistant
  • Larger capacity available
  • Professional installation included

Desalination Options for Extended Cruising

Never worry about running out of fresh water again. Convert unlimited saltwater to pure drinking water.

How Desalination Works

Advanced reverse osmosis technology removes salt, minerals, and impurities from seawater, producing crystal-clear drinking water.

Benefits:

  • Unlimited water supply
  • No tank refueling needed
  • Extended range capability
  • Fresh water for all uses
  • Peace of mind cruising

System Options

Choose between manual, semi-automatic, or fully integrated systems based on your cruising style and power availability.

Available Configurations:

  • Manual hand-operated units
  • 12V/24V marine power systems
  • 110V shore power options
  • Solar-compatible systems
  • Generator-compatible models

Installation & Support

Professional installation at your location. We handle plumbing integration and system commissioning.

What's Included:

  • Custom design consultation
  • Professional installation
  • Sea-trial commissioning
  • Maintenance training
  • Ongoing technical support

Interested in desalination for your vessel?

Our marine engineers will assess your boat and recommend the ideal system.

Discuss Desalination Options

Custom Marine & RV Solutions

Every vessel and RV is unique. We design custom filtration systems for specific needs and space constraints.

Custom Design Services

Our marine specialists work with you to design the perfect system for your specific application.

We Can Customize:

  • Multi-stage filtration systems
  • Integrated desalination
  • Dual-zone water systems
  • Hot water integration
  • Shower/deck wash systems
  • Emergency water backup
  • Grey water recycling options

Marine-Grade Installation

Professional installation with marine-grade materials and techniques. Systems built to withstand saltwater environments.

Our Process:

  • Vessel assessment and survey
  • Custom system design
  • Material selection
  • Professional installation
  • Pressure testing & inspection
  • Performance commissioning
  • Maintenance documentation

Liveaboard Solutions

Comprehensive water systems for full-time cruising and mobile living. Reliability you can count on.

Features:

  • High-capacity filtration
  • Redundant systems available
  • Multiple source compatibility
  • Extended filter life
  • Minimal maintenance needs
  • 24/7 support availability

RV-Specific Solutions

Systems designed specifically for RV water systems and the unique challenges of motorhomes and travel trailers.

RV Applications:

  • Fresh water tank filtration
  • Holding tank treatment
  • Shower water improvement
  • Drinking water upgrade
  • Grey water management
  • Winterization compatibility

Need a customized marine or RV water solution?

Contact our specialists to discuss your unique requirements.

Discuss Custom Needs

Why Choose pH Prescription for Marine & RV Water?

Marine Expertise

Specialists in marine and RV applications. We understand the unique challenges of saltwater environments and mobile living.

Compact Innovation

Engineered specifically for tight spaces. Our systems provide maximum filtration in minimal footprint.

Durability

Marine-grade materials and construction. Systems designed to withstand saltwater, vibration, and constant motion.

Custom Solutions

One-of-a-kind systems designed for your specific vessel or RV. Not one-size-fits-all products.

Remote Support

24/7 technical support available while you're cruising. Email, phone, or video consultation anytime, anywhere.

Trusted Quality

40+ years serving water needs nationwide. Made in USA systems backed by lifetime warranty.

Ready to Improve Your Marine or RV Water?

Get a free consultation and custom quote for your boat, yacht, RV, or motorhome.

Request Marine/RV Quote

Or call our marine solutions specialists at (772) 220-8789