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CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK2 with ResMed AirSense 11
  • Water chamber plugged into CSpring MK2 with ResMed AirSense 11
  • CSpring MK3 CPAP Water Chamber Automatic Refilling System top adapter included airsense 11
  • CSpring MK3 CPAP Water Chamber Automatic Refilling System top adapter included airsense 10
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK2 with ResMed AirSense 11
  • Water chamber plugged into CSpring MK2 with ResMed AirSense 11
  • CSpring MK3 CPAP Water Chamber Automatic Refilling System top adapter included airsense 11
  • CSpring MK3 CPAP Water Chamber Automatic Refilling System top adapter included airsense 10
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
CSpring MK3 CPAP Humidifier Water Chamber Refilling System
Cspring™ | SKU:
CSMK3AS11

CSpring MK3 CPAP Humidifier Water Chamber Refilling System

$299.99
CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK2 with ResMed AirSense 11
  • Water chamber plugged into CSpring MK2 with ResMed AirSense 11
  • CSpring MK3 CPAP Water Chamber Automatic Refilling System top adapter included airsense 11
  • CSpring MK3 CPAP Water Chamber Automatic Refilling System top adapter included airsense 10
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
  • CSpring MK3 CPAP Humidifier Water Chamber Refilling System
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Product Specifications

Compatibility AirSense 11, AirCurve 11, AirSense 10, AirCurve 10
Dimensions 7" (L) x 11" (H) x 10" (W)
Material BPA-free, medical-grade materials
Warranty 1-year standard (Device); 90 days (Accessories)
Returns Accepted within 14 days
Exchanges Accepted within 30 days
Hygiene Features UVC light and silver-ion material; the manufacturer states they help reduce bacteria and biofilm (not a sterilizer)
Sensor Technology Advanced sensors for precise water level management
Operational Modes Ambient light mode, lights off mode
Power Supply AC power supply included

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Overview

The CSpring MK3 Automatic CPAP Water Chamber Refilling System keeps your CPAP humidifier topped up so you do not have to refill it every night. Water-level sensors monitor the chamber and replenish it from an external reservoir, keeping humidity consistent through your therapy.

It works with the ResMed AirSense 11, AirCurve 11, AirSense 10, and AirCurve 10. Setup takes a few minutes and no tools: you replace your humidifier's top lid with the CSpring adapter, then connect the sensor harness and water hose. The chamber uses silver-ion material and a UVC light that the manufacturer states help reduce bacteria and biofilm in the water.

Please note: the MK3 manages your water level only. It is not a sterilizer and does not heat the water. Use distilled water to prevent mineral buildup, and set it up per the instructions to avoid leaks.

Guide and Resources

Returns Policy
CPAP Supplies Guide

Important Tips

  • Use distilled water to prevent mineral buildup and help extend the life of your system and humidifier chamber.
  • After installation, always test the system before use to ensure the auto-refill function and UVC sanitization are working properly.
  • Check the UVC light indicator regularly to confirm that sanitization is active and protecting your water supply.
  • Clean the water chamber and tubing weekly with CPAP Soap and warm water to maintain hygiene.
  • Use a CPAP cleaning brush set to scrub the inside of your tubing and hose connectors thoroughly.
  • Keep the water hose free from bends or kinks to ensure smooth and uninterrupted water flow throughout your therapy.
  • Replace the water chamber every 6–12 months, or sooner if there are signs of wear, staining, or odor.
  • Make sure the CSpring MK3 system is placed on a stable surface to avoid misalignment of the sensor harness or water line.
  • Inspect the water hose and sensor harness periodically for signs of wear or damage, and replace any compromised components promptly.
  • Only use the CSpring MK3 with compatible CPAP models: AirSense 11, AirCurve 11, AirSense 10, AirCurve 10, and DreamStation 2 for reliable performance and proper fit.
  • If you're unsure whether your setup is compatible, visit the CPAP Machines page or contact support before installation.
  • Avoid direct sunlight or high heat exposure to protect the electronics and prevent interference with the UVC light or sensors.
  • Warranty covers 90 days, with returns accepted within 14 days and exchanges available up to 30 days.

What’s Included

The CSpring MK3 Automatic CPAP Water Chamber Refilling System keeps your CPAP humidifier topped up so you do not have to refill it every night. Water-level sensors monitor the chamber and replenish it from an external reservoir, keeping humidity consistent through your therapy.

It works with the ResMed AirSense 11, AirCurve 11, AirSense 10, and AirCurve 10. Setup takes a few minutes and no tools: you replace your humidifier's top lid with the CSpring adapter, then connect the sensor harness and water hose. The chamber uses silver-ion material and a UVC light that the manufacturer states help reduce bacteria and biofilm in the water.

Please note: the MK3 manages your water level only. It is not a sterilizer and does not heat the water. Use distilled water to prevent mineral buildup, and set it up per the instructions to avoid leaks.

See Product Details
CSpring MK3 CPAP Humidifier Water Chamber Refilling System

CSpring MK3 CPAP Humidifier Water Chamber Refilling System

$299.99
$299.99
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Product Features
Replacement Parts
Reviews
Expert Tips
FAQs

Product Features

Automatic Humidity Control
The CSpring MK3 maintains optimal water levels in your CPAP humidifier by using smart sensors. These sensors monitor water levels continuously, ensuring consistent humidity throughout your therapy without manual refills.

Silver Ion Antimicrobial Technology
The water chamber uses silver ion technology to inhibit bacterial growth, preventing biofilm formation and maintaining hygiene over time. This technology reduces the risk of respiratory irritation caused by microbial buildup.

Quick and Simple Installation
Installation involves replacing the existing humidifier lid with the CSpring MK3 adapter, connecting the sensor harness and water hose.
CSpring MK3 CPAP Humidifier Water Chamber Refilling System

Advanced Sensor Harness

Equipped with a 3.5-foot sensor harness, the system actively manages water flow to prevent overfilling or running dry.

Eco-Friendly

The automatic refilling system minimizes water wastage compared to manual refilling methods. By supplying only the necessary amount of water, it contributes to more efficient water use during therapy.

Safe Materials

The device is constructed using BPA-free and medical-grade materials, meeting safety standards for prolonged use in medical applications. It’s designed for durability, capable of withstanding daily use.

Wide Compatibility

The refilling system is designed to integrate with various CPAP and BiPAP humidifier chambers, including the ResMed AirSense and AirCurve 10 and 11.

Quick and Simple Installation

Installation involves replacing the existing humidifier lid with the CSpring MK3 adapter, connecting the sensor harness and water hose.

Expert Tips & Videos

CPAP Supplies Replacement Times
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FAQs

What is the cSpring MK3 and how does it work?

It is an automatic water-chamber refilling system for CPAP humidifiers. Water-level sensors keep your humidifier chamber topped up from an external reservoir, so you do not have to refill it every night.

Which CPAP machines is it compatible with?

It is designed for the ResMed AirSense 11, AirCurve 11, AirSense 10, and AirCurve 10, using the included top-lid adapter for your chamber.

How do I install it?

Replace your humidifier's top lid with the CSpring adapter, then connect the sensor harness and the water hose. It takes a few minutes and no tools.

Does it sterilize or heat the water?

No. The MK3 manages your water level only. It is not a sterilizer and does not heat the water. The chamber uses silver-ion material and a UVC light that the manufacturer states help reduce bacteria and biofilm.

What water should I use?

Use distilled water to prevent mineral buildup in the chamber and reservoir. Avoid tap or bottled water.

Will it keep the chamber from running dry or overfilling?

The sensors are designed to keep the chamber within the correct range so it does not run dry or overfill. Set it up per the instructions, and place the reservoir as directed to avoid leaks.

How do I clean it?

Empty and rinse the chamber daily, and wash the chamber and adapter weekly with mild soap and water. Always use distilled water and let parts air dry.

Is the cSpring MK3 FSA/HSA eligible?

Yes. It is FSA/HSA eligible at Sleeplay.
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