# CPAP Supply Replacement Schedule (2026 Guide)

When to replace your CPAP mask, cushion, tubing, filters, and water chamber. Manufacturer timelines and real-world signs.

Source: https://cpapclarity.com/learn/cpap-supply-replacement-schedule
Published: 2026-04-08
Updated: 2026-04-08
Author: Brian C.

Informational, not medical advice. Talk to your sleep physician before changing your therapy, pressure, mask, or medications.

CPAP supplies wear out, and how often to replace each part depends on who you ask. The makers' own guidance replaces most parts about every 6 months, while Medicare covers replacements much more often, and US suppliers usually ship on Medicare's limits. This guide sets out both for every component, the real-world signs that something needs replacing earlier than expected, and how your own therapy data can warn you before comfort drops.

## Why Replacement Timelines Matter

CPAP equipment is high-touch, high-humidity gear that runs for six to eight hours every single night. Silicone cushions lose their seal as skin oils break down the polymer surface. Tubing develops micro-tears at the cuff connections. Disposable filters clog as they trap dust, dander, and pollen from your bedroom air. When components degrade, your therapy suffers in measurable ways: leak rates climb, pressure delivery becomes inconsistent, and comfort drops to the point that you might find yourself ripping the mask off at 3 a.m.

The Medicare local coverage determination LCD L33718 lays out the federal baseline for what insurance plans will cover and when for CPAP devices and accessories under obstructive sleep apnea. Private plans set their own limits. The catch is that the covered schedule is a maximum, not a personalized prescription. Many CPAP users either over-replace (wasting money) or under-replace (compromising therapy quality without realizing it). This guide gives you both reference points so you can decide what makes sense for your equipment, your skin chemistry, and your sleep environment.

## The Standard Replacement Schedule

The maker column comes from three documents, each named in the Source column: [ResMed Australia patient guidance, 2021](https://www.resmed.com.au/blog/heres-how-often-you-should-be-replacing-your-cpap-gear) (ResMed's only published interval for mask parts; its US mask user guides say to replace a part when it is worn or damaged), the [ResMed AirSense 10 and 11 user guides](https://document.resmed.com/documents/products/machine/airsense-11/user-guide/airsense11_user-guide_amer_mul.pdf) (the air filter, and the design life of the standard water tub and the air tubing, heated or not), and the [Philips DreamStation user manual](https://www.philips.com/c-dam/b2bhc/master/landing-pages/src/update/replacement-devices/dreamstation/en-us/philips-dreamstation-cpap-auto-cpap-user-manual.pdf). The Medicare column is the most Medicare usually covers ([CMS LCD L33718](https://www.cms.gov/medicare-coverage-database/view/lcd.aspx?lcdid=33718)). Your own plan may differ, so confirm with your [DME](https://cpapclarity.com/learn/glossary#durable-medical-equipment) (durable medical equipment) supplier or insurance carrier.

| Component | Maker guidance | Source | Medicare usually covers |
|---|---|---|---|
| Mask cushion (full face) | 6 months (silicone), 1 month (memory foam) | ResMed Australia patient guidance, 2021 | Up to 1 a month |
| Mask cushion (nasal/pillow) | 6 months (silicone) | ResMed Australia patient guidance, 2021 | Up to 2 a month |
| Mask frame | 6 months | ResMed Australia patient guidance, 2021 | Up to 1 every 3 months |
| Headgear/straps | 6 months | ResMed Australia patient guidance, 2021 | Up to 1 every 6 months |
| Tubing (standard) | 6 months (ResMed), 6 months (Philips) | ResMed AirSense 10 and 11 user guides; Philips DreamStation user manual | Up to 1 every 3 months |
| Heated tubing (ClimateLine) | 6 months | ResMed AirSense 10 and 11 user guides | Up to 1 every 3 months |
| Disposable filters | 6 months (ResMed), 1 month (Philips ultra-fine) | ResMed AirSense 10 and 11 user guides; Philips DreamStation user manual | Up to 2 a month |
| Reusable filters | 6 months (Philips pollen) | Philips DreamStation user manual | Up to 1 every 6 months |
| Humidifier water chamber | 6 months (standard), 2.5 years (cleanable) | ResMed AirSense 10 and 11 user guides | Up to 1 every 6 months |
| Chinstrap (if used) | No maker interval found | None | Up to 1 every 6 months |

Neither column is a rule. If a part shows signs of wear before its interval, replace it sooner; the makers' user guides all say to replace a part that is worn, cracked or torn. The Medicare column is a coverage limit: replacing that often is allowed, not required.

## Component-by-Component Guide

### Mask Cushion

The cushion is the most frequently replaced component because it is the part of your mask that actually touches your face. Six to eight hours of nightly contact with skin oils, perspiration, and the moisture from a humidified airway gradually breaks down the silicone or memory foam surface. The polymer slowly loses its memory and stops returning to its original shape. Once that happens, the cushion can no longer form a clean seal against your face under positive pressure.

Cushion lifespan depends heavily on type. Soft nasal pillows (which contact a small area) wear out faster than full face cushions (which spread contact across a larger surface). Memory foam cushions, like the AirTouch F20, trade longevity for a soft seal; ResMed's patient guidance puts them at every month, against every 6 months for silicone.

**Signs it needs replacing:**
- Visible discoloration, yellowing, or stiffness
- Permanent impressions or flat spots that do not spring back
- Increasing [leak rates](https://cpapclarity.com/learn/cpap-leak-fix) despite proper fitting and headgear adjustment
- Skin irritation or red marks that were not present when the cushion was new
- Audible air noise around the cushion seal that was not there last week

**Data signal:** Use [CPAP Clarity](https://cpapclarity.com/) to track your nightly leak trends. A gradual upward drift in median leak rate over two to four weeks, with no change in sleeping position or headgear tension, is a textbook cushion-wear signature. The leak chart on your dashboard tells you when to swap before your sleep quality drops.

**Common ResMed mask cushion replacements**

- **ResMed AirFit P10 Nasal Pillow Cushion** (Best for Nasal Pillow Users): Featherweight nasal pillow cushion. The most popular replacement on the site.
- **ResMed AirFit F20 Full Face Cushion** (Best for Full Face Users): InfinitySeal silicone full face cushion.
- **ResMed AirTouch F20 Memory Foam Cushion** (Best Comfort): Memory foam cushion for the F20 frame. ResMed's patient guidance says to replace memory foam cushions every month.

### Mask Frame

The rigid plastic frame that holds the cushion and connects to the tubing wears more slowly than the cushion itself. But swivel joints, clip mechanisms, and magnetic connectors can loosen over months of nightly use, and stress cracks can develop around the forehead support or the cushion clip on full face frames.

**Signs it needs replacing:**
- Swivel elbow does not rotate freely or leaks at the joint
- Clips that connect to headgear have lost their grip
- Cracks or stress marks in the plastic, especially around the forehead support
- Magnetic clips (on newer AirFit models) that no longer hold position firmly

A worn frame is also worth catching because a slightly cracked plenum can leak even with a brand-new cushion installed, which makes it easy to misdiagnose the problem as a cushion issue and waste a replacement.

### Headgear and Straps

Headgear stretches over time as the elastic fibers break down from nightly tension and washing. Most users compensate by tightening the straps notch by notch, which is exactly the wrong response: tighter headgear distorts the cushion seal, increases facial pressure marks, and can actually worsen leaks by pushing the cushion off-center.

**Signs it needs replacing:**
- Straps no longer hold the mask in place at their previous adjustment
- Velcro tabs have lost their grip and the strap slides under tension
- Fabric is fraying or pilling along the contact edges
- You have tightened the headgear more than twice beyond your original setting

Washing headgear weekly with mild soap extends its useful life noticeably. Avoid fabric softener; it coats the elastic fibers with surfactant residue that accelerates the loss of stretch.

### Tubing

The ResMed AirSense 10 and 11 user guides give air tubing, heated or not, a 6-month design life, and say to replace it sooner if it has holes, tears or cracks. The Philips DreamStation manual also says every 6 months. Medicare covers standard or heated tubing up to once every 3 months. Tubing wear is mostly about two things: micro-tears at the cuff connections (where the tube clips onto the machine and the mask), and biological residue inside the tube that washing cannot fully remove.

**Signs it needs replacing:**
- Visible discoloration inside the tubing (usually a gray or brown tint when held up to a light)
- Persistent odor after washing
- Small holes, tears, or cracks, often at the cuff connections where the tube flexes most
- Stiffness or loss of flexibility
- [Rainout](https://cpapclarity.com/learn/cpap-rainout-fix) that persists despite correct humidity settings (micro-tears can let cool room air in)

To inspect your tubing, hold it up to a bright light and look through it lengthwise. Discoloration you cannot wash out means biological material has penetrated the tubing wall, and at that point no amount of cleaning will fully remove it. Time for a new tube.

- **Universal 6 ft CPAP Hose (22mm)** (Standard Tubing Replacement): Standard non-heated CPAP tubing in the most common 22mm / 6 ft size. Compatible with ResMed AirSense, AirCurve, and most Philips machines.

### Filters

Filters depend on the machine. ResMed AirSense 10 and 11 machines take one disposable filter, which their user guides say to replace at least every 6 months, or sooner if it has holes or is blocked with dirt or dust. Philips DreamStation machines take a reusable blue pollen filter, rinsed regularly and replaced every 6 months, plus an optional light-blue ultra-fine filter replaced every month (the manual says every 30 days).

The disposable filter does the bulk of the work, catching the smallest particles your bedroom air carries: dust mites, pet dander, pollen fragments. A clogged disposable filter forces the motor to work harder, which can increase noise, reduce the accuracy of the pressure the machine delivers, and shorten the motor's lifespan over years.

**Signs the disposable filter needs replacing:**
- Visible discoloration (gray, brown, or yellow)
- Reduced airflow or noticeably increased machine noise
- Any tears, holes, or compressed spots that break the seal

**Signs the reusable filter needs replacing:**
- Discoloration that does not rinse out
- Loss of shape or structural integrity
- Persistent odor after rinsing and air-drying

Never run your CPAP without filters. They protect the motor and prevent dust and allergens from entering your airway. A 30-pack of replacement filters costs about as much as one mask cushion and takes 10 seconds to swap.

**Disposable filter 30-packs**

- **AirSense 11 Disposable Filter (30-pack)** (Best Value): 30-pack of disposable filters compatible with the AirSense 11. Filter geometry is model-specific to the AS11 (the AS10 pack is a different shape).
- **AirSense 10 / AirCurve 10 Disposable Filter (30-pack)** (Best Value): 30-pack of disposable filters compatible with AirSense 10, AirCurve 10, S9, and AirStart 10 machines.

### Humidifier Water Chamber

The water chamber develops mineral deposits over months of use, even with distilled water. With tap water the buildup is much faster and harbors more biofilm. The Centers for Disease Control and Prevention notes that respiratory equipment exposed to standing water at room temperature is a known reservoir for opportunistic bacteria (most relevantly for CPAP users, certain non-tuberculous mycobacteria), which is the underlying reason every CPAP manufacturer's user guide tells you to use distilled water and clean the chamber regularly.

**Signs it needs replacing:**
- White mineral buildup that does not dissolve with a vinegar soak
- Cracks, chips, or clouding in the plastic
- Gasket or lid seal that no longer seals properly (causing leaks or reduced humidity output)
- Persistent odor after cleaning
- Discoloration that has penetrated the plastic surface

Using distilled water instead of tap water significantly extends chamber life. If you have been using tap water and notice white buildup, a monthly soak in a 1:3 white vinegar and water solution for 20 minutes can dissolve light deposits. Heavy mineral scale that has bonded to the plastic is permanent, and at that point the chamber needs replacing.

**Humidifier chambers and distilled water**

- **AirSense 11 Compatible Water Chamber** (AirSense 11): Replacement water chamber compatible with the AirSense 11, with a 20-pack of disposable filters included. ResMed's AirSense 11 user guide gives its own standard tub a 6-month design life; replace any tub sooner if it is cracked, cloudy or pitted.
- **ResMed AirSense 10 / AirCurve 10 Water Chamber (OEM)** (AirSense 10 / AirCurve 10): Genuine ResMed part 37299 replacement chamber for the AirSense 10 and AirCurve 10. Same design through the entire AS10 / AC10 generation.
- **Distilled Water for CPAP** (Daily Use): Distilled water for the humidifier chamber. Prevents the mineral scale that shortens chamber lifespan and reduces biofilm risk vs. tap water. Grocery stores carry it cheapest; this is the online option.

## Using Your CPAP Data to Spot Wear

Your SD card data contains early-warning signals that something needs replacement, often before you notice the change at a conscious level. This is the part of the supply schedule that most users miss, and it is also where CPAP Clarity earns its keep.

**Leak rate trends.** A gradual increase in median leak rate over two to four weeks, with no change in mask type or sleeping habits, strongly suggests cushion or headgear wear. The leak signal usually shows up in the data before it becomes a comfort problem you would consciously notice. Your [history page](https://cpapclarity.com/history) charts the trend night by night.

**Pressure variability.** On auto-titrating machines (APAP), increasing pressure variability (wider swings between the 50th-percentile and 95th-percentile pressure) can indicate that the machine is working harder to compensate for leaks or flow restriction. A dirty filter is not the usual explanation here. An auto machine decides how much pressure to deliver from what it measures at your airway (flow limitation, snoring, and apneas), not from the state of its intake filter, so a filter that needs changing shows up as motor effort and noise rather than as wider pressure swings or a steady climb. Widening swings or a rising pressure trend are more often congestion, allergy season, alcohol, or a change in weight or sleep position. Replace an overdue filter anyway, because ResMed notes a blocked filter can affect the pressure the machine delivers, but do not expect it to explain the trend.

**Usage patterns.** If you start removing your mask earlier in the night or waking more frequently, declining equipment comfort may be a factor even if you do not consciously connect the dots. The therapy score in CPAP Clarity weights both leak and usage hours, so a declining score with stable AHI often points at equipment fatigue rather than a clinical change.

Import your SD card data into [CPAP Clarity](https://cpapclarity.com/) to see these trends laid out in one place. The dashboard puts leak, pressure variability, and usage hours next to each other so the equipment story is easy to read.

## Insurance Coverage Tips

Most private insurance plans and Medicare Part B cover CPAP supply replacements on a set schedule that closely mirrors the table at the top of this article. To stay covered:

- Your prescribing physician must have an active CPAP prescription on file
- Your DME supplier handles the ordering and billing through your insurance plan
- Many DME suppliers offer auto-ship programs that send replacement supplies on the covered cadence (set-it-and-forget-it, but check that you are not paying for parts you have not actually run out of)
- Keep your [compliance data](https://cpapclarity.com/learn/cpap-compliance-medicare-rule) current; some plans require documented usage to continue covering supplies
- Plan ahead for the multi-year supply bill, since tubing, cushions, and filters add up over the life of your machine. The [CPAP cost calculator guide](https://cpapclarity.com/learn/cpap-cost-calculator-guide) breaks out the running totals so the budget is not a surprise.

If you are paying cash, buying cushions and filters directly is often noticeably cheaper than going through a DME supplier without insurance. The catch is that you lose the auto-ship cadence and need to remember to reorder.

## A Simple Maintenance Calendar

If keeping track of replacement dates feels overwhelming, here is a simplified routine that maps cleanly onto a phone reminder:

- **Every use:** Empty and rinse the humidifier chamber. Wipe the mask cushion.
- **Every week:** Wash the mask, tubing, and humidifier chamber with mild soap and warm water. Rinse the reusable filter if your machine has one. The [full CPAP cleaning guide](https://cpapclarity.com/learn/how-to-clean-cpap) walks through each step. Pair a monthly check with the [CPAP deep clean (monthly)](https://cpapclarity.com/learn/cpap-deep-clean-monthly) routine.
- **Every month:** Inspect the cushion, frame, headgear, tubing and filter, and replace anything worn, cracked or torn. Replace a memory foam cushion, and a DreamStation ultra-fine filter.
- **Every 6 months:** Replace a silicone cushion, the mask frame and headgear, the air filter (sooner if it has holes or is blocked), the tubing, and a standard water tub (ResMed's cleanable tub lasts 2.5 years).

If you get supplies on auto-resupply, your supplier will usually ship on the Medicare column instead, which is more often.

Set recurring reminders on your phone for the monthly and quarterly items. The therapy you get from consistent maintenance is meaningfully better than the therapy you get from a machine running on tired parts, and the cost difference is small over a year.

## Frequently Asked Questions

**How often should I replace my CPAP mask?**
ResMed's patient guidance puts silicone cushions, the mask frame and headgear at about every 6 months, and memory foam cushions at every month; its user guides say to replace any part that is worn, cracked or torn. Medicare covers more often, a full-face cushion up to 1 a month and nasal cushions or pillows up to 2 a month, which is what US suppliers usually ship.

**Can I extend the life of my CPAP supplies?**
Yes, modestly. Wash everything weekly with mild soap and warm water, use distilled water in the humidifier, and avoid fabric softener on headgear. But silicone cushions and elastic headgear have a finite lifespan no matter how carefully you maintain them; replace any part that is worn, cracked or torn, whatever the calendar says.

**What happens if I do not replace my CPAP filter on time?**
The motor works harder, machine noise increases, and ResMed notes a blocked filter can affect the pressure the machine delivers. Dust and allergens can also bypass the filter and enter your airway. A clogged filter does not immediately damage the machine, but running with a tired filter for months can shorten motor lifespan.

**Does Medicare cover CPAP supply replacements?**
Yes. Medicare Part B covers replacements up to the limits in the table's Medicare column. You need an active CPAP prescription and (in most cases) documented compliance with therapy. Your DME supplier handles billing.

**Is it safe to use tap water in my CPAP humidifier?**
It is not recommended. Tap water leaves mineral scale that shortens chamber life and increases biofilm risk. The CDC and every CPAP manufacturer recommend distilled water. If distilled water is unavailable (travel, emergencies), boiled-and-cooled or filtered water is a short-term fallback, not a routine substitute.

## Primary Sources

- ResMed. *AirSense 11 AutoSet product page* (machine specifications, supply compatibility). [resmed.com AirSense 11](https://www.resmed.com/en-us/products/cpap/machines/airsense-11/)
- ResMed. *Here's how often you should be replacing your CPAP gear* (ResMed Australia patient guidance, 2021). [resmed.com.au](https://www.resmed.com.au/blog/heres-how-often-you-should-be-replacing-your-cpap-gear)
- ResMed. *AirSense 11 user guide* (US): replace the air filter every six months, more often if it has holes or blockages; design life of the standard humidifier tub and the air tubing 6 months, the cleanable tub 2.5 years. The AirSense 10 user guide gives the same tub and tubing design life. [document.resmed.com](https://document.resmed.com/documents/products/machine/airsense-11/user-guide/airsense11_user-guide_amer_mul.pdf)
- Philips Respironics. *DreamStation user manual* (US): pollen filter every six months, ultra-fine filter every 30 days, tubing every six months. [philips.com](https://www.philips.com/c-dam/b2bhc/master/landing-pages/src/update/replacement-devices/dreamstation/en-us/philips-dreamstation-cpap-auto-cpap-user-manual.pdf)
- Centers for Medicare and Medicaid Services. *Local Coverage Determination L33718: Positive Airway Pressure (PAP) Devices for the Treatment of Obstructive Sleep Apnea*. The ACCESSORIES section carries the usual-maximum replacement table this article's insurance column is drawn from (A4604 heated tubing 1 per 3 months; A7032 / A7033 nasal interfaces 2 per 1 month; A7037 tubing 1 per 3 months; A7035 headgear and A7046 water chamber 1 per 6 months). [CMS LCD L33718](https://www.cms.gov/medicare-coverage-database/view/lcd.aspx?lcdid=33718)
- Centers for Disease Control and Prevention. *Guideline for Disinfection and Sterilization in Healthcare Facilities, 2008 (with updates)*. Background on biofilm formation in respiratory equipment exposed to standing water. [cdc.gov executive summary](https://www.cdc.gov/infection-control/hcp/disinfection-sterilization/executive-summary.html)