• Water Doctor COMO-R700 tankless reverse osmosis system
Water Doctor

Water Doctor COMO-R700 Tankless RO System

$1,199.99 CAD
SKU: CM-R700
Compact tankless RO system for everyday drinking waterThe Water Doctor COMO-R700 Tankless RO System is a compact undersink reverse osmosis system built for daily home use. It is a good...

In stock and ready to ship

Water Doctor COMO-R700 tankless reverse osmosis system
$1,199.99 CAD

Before you choose a drinking-water system

Compare flow rate, storage style, and filter maintenance with Water Doctor if you are not fully sure this is the right RO system for your household.

Get Drinking Water Advice Talk to Water Doctor

If you are still diagnosing the problem, use one of these tools before you commit to checkout.

Water Diagnosis Check Water Hardness Rule out a whole-home hardness problem before solving only the drinking-water tap. Guided Selection Help Me Choose Use the guided path to compare RO, whole-home filtration, and hardness-led next steps.
Estimated delivery: Jun 26 - Jun 30
Pairs well with
Payment and security

Your payment information is processed securely.

  • American Express
  • Apple Pay
  • Diners Club
  • Discover
  • Google Pay
  • Mastercard
  • PayPal
  • Shop Pay
  • Visa
View details

Compact tankless RO system for everyday drinking water

The Water Doctor COMO-R700 Tankless RO System is a compact undersink reverse osmosis system built for daily home use. It is a good fit for customers who want a tankless RO setup with strong flow, a clean cabinet layout and simple cartridge maintenance.

Best for

  • Households that want better-tasting drinking water from the kitchen tap
  • Customers upgrading from bottled water or pitcher filters
  • Kitchens where a storage tank takes up too much space
  • Homes that want a balanced tankless RO option below the R1000 model

Key benefits

  • 700 GPD tankless RO design for steady daily use
  • Space-saving undersink system with no separate storage tank
  • Fast direct drinking water flow for cups, kettles and cooking
  • Easy cartridge replacement with compatible COMO-R700 filters
  • Modern design for a cleaner kitchen installation

Maintenance

Replace the PCB and RO cartridges with genuine Water Doctor COMO-R700 replacement filters. Actual replacement timing depends on household usage and source water conditions.

Installation note

Professional undersink installation is recommended, especially when adding a dedicated faucet or connecting the system to an existing kitchen setup.
  • Water Doctor COMO-R700 tankless reverse osmosis system
1 / 1
Press & drag to view

  • Free Assessment

    Confirm fit before you order the wrong system or replacement part.

  • Installation Planning

    Talk to Water Doctor about setup, compatibility, and service expectations.

  • Shipping and Support

    Order online with a clear path to support before and after delivery.

  • Replacement Ready

    Keep maintenance, filters, and UV lamp replacements simple over time.

    Buy with more confidence

    Water Doctor is strongest when product, installation, and maintenance are treated as one system.

    • Confirm the Right Fit

      Match this product to your water problem, household size, and plumbing setup before checkout.

      Book Free Assessment
    • Water Doctor whole-house water pipe disinfection service

      Plan Installation

      Check access, service area, and installation timing so there are no surprises after purchase.

      Talk to Water Doctor

    • Think About Maintenance

      Replacement filters, UV lamps, and long-term care should be part of the buying decision from day one.

      Shop Replacement Filters
    Before you order

    Need help confirming fit, installation, or maintenance?

    Water Doctor can help you verify whether this product matches your water problem, installation setup, and replacement schedule before checkout.
    Book Free Assessment Talk to Water Doctor
    After purchase support

    Keep performance high with the right replacement and service plan.

    Water treatment performance depends on timely maintenance. Save your model details, set replacement reminders, and use Water Doctor support when unsure about cartridges, UV lamps, or service intervals.
    Shop Replacement Filters Contact Support

    Technical Resources

    File Size Date Download
    		Mb Download
    		Mb Download
    		Mb Download

    Replacement and maintenance essentials

    Keep filters, UV lamps, and ongoing maintenance items easy to reorder.
    View all

    Related Products

    Recently viewed

    Still looking for another product or replacement part?