Replacing Spare Parts

Some parts of the pump require replacing on a regular basis to maintain your pump in peak condition. After a while parts will degrade, and mums may notice a decrease in milk output and worry about their supply. Not replacing parts regularly will make the pump motor work harder, leading to unnecessary wear and tear on the pump, and also risking moisture in the motor.

Your cleaning technique may also impact how often parts need replacing. Those who sterilise after every use and those who use the dishwasher to clean parts will need to replace more often than someone who washes with warm soapy water.

The more often you use your pump, whether that be times a day or minutes per session, the more regularly you should replace certain parts.

If you have purchased a second hand pump, a full shield set should be purchased before you begin using the pump.


Valve membranes: 2 weeks - 2 months

The little white flaps on the valves need to be replaced regularly. The membranes are made of silicone and over time will stretch and lose elasticity, which can impact suction power. Replace these every 2 months if you use your pump once or twice a day, and replace every 2-4 weeks if you exclusively pump. If you ever see that the membrane doesn’t lay flat against the valve, it’s time to replace it, but it’s worth noting that damage is not always visible in these small pieces. If your pump loses suction on one side, or you experience a lot less suction when double pumping, these membranes need replacement. The valve membrane needing replacement causes the vast majority of suction issues.

Duck valves: 2 - 3 months

If your milk collection kit has a silicone duck valve, it needs to be replaced frequently as well. Replace these every 2-3 months if you use your pump once or twice a day, and replace every 4 weeks if you exclusively pump. Duck valves last a little bit longer than valve membranes

Backflow protectors: 3 - 6 months

Just like the valve membranes, the membranes in the backflow protectors can stretch and degrade over time, impacting suction. Replace these every 6 months if you pump once or twice a day, and replace every 3 months if you exclusively pump. Inspect this part regularly before you pump because a torn or damaged backflow protector membrane can allow moisture into the pump motor, causing irreparable damage and the potential for mould and bacteria to fester. This part does not come in contact with your baby’s milk, so does not need to be washed, unless you see condensation in the part. Then, wash it in hot soapy water and let it air dry and ensure it is completely dry before use again. The backflow protector is the heart of a closed system pump and protect your baby’s milk from contaminants and bacteria that could cause harm, so take great care of these. If not changed regularly, they will impact suction strength.

Backflow Filters: as needed

If you're using the DEW 350, replace your backflow filters whenever moisture enters. The pink lines will turn blurry when they need to be replaced. 

Tubing: as needed

The backflow protector should prevent moisture from entering the tubing. However, should moisture ever enter the tubing, we recommend replacing the tubing. There is no way to sterilise the tubing and it’s important to keep the tubing completely dry because moisture can cause damage to the motor.

The ends of the tubing can also stretch out and degrade over time with use, which can impact suction performance of the pump. If the tubing slides on and off the backflow protector or pump motor easily, then it’s time to replace it. Note that it is typical for the tubing to slip off if you are moving around while pumping, or if the tubing isn’t secured tightly onto the pump motor or backflow protector. This is how it’s supposed to work, therefore not a sign of needing replacement. Just take care to notice if the tubing slips on and off considerably easy, then it may be time to replace.

Breastshields: 6 months

Replace the breastshield every 6 months if you exclusively express, or as needed if you pump less frequently. Keep an eye out for buildup of residue in cracks and crevices of the shield – sometimes the most rigorous cleaning routine is no match for hard to reach places, and over time buildup does occur. For this reason we recommend replacement every 6 months.

And in general, always replace parts if you see they are torn, distorted, or cracked. It is worth noting that in plastic parts, sometimes discoloration can occur as resulting from the sterilisation process; this does not impact the usability of the parts and they do not need to be replaced when this occurs.

How do I dispose of old parts?

Breast shields, collection bottles, and other plastic components of your milk collection kit can be recycled by your local authority. Be sure to sterilise them first. Tubing and silicone parts like membranes and valves can be tossed in with your regular municipal waste. Pump motors can be returned to Spectra, or recycled at a designated electronics recycling center. Do not dispose of breast pumps in your regular trash.

Frequently Asked Questions

Q. I had another baby and I want to continue using my original breast pump. Is there anything I need to replace?

Milk collection kits, which include tubing, backflow protectors, valves and bottles should be replaced for a second baby. It’s best to start out with a brand new kit so you can better keep track of which parts need to be replaced regularly as recommended, and avoid gradual reduced suction over time which can occur in older parts – especially if they have been sitting unused for some time. As for the pump motor we recommend inspecting the functionality ahead of time by assembling and attaching the pump kit and visually inspecting that the backflow protectors are moving back and forth correctly. We recommend storing breast pumps in a cool closed off area free of moisture to prevent possible damage while not in use.

Q. I bought a second hand pump. What parts should I replace?

When buying second-hand, never buy milk collection kits – only buy the pump. There is no way of sterilising milk collection kits to make them safe for multiple users, ever. If you’ve purchased a second-hand pump, be sure to purchase brand new breast shields, bottles and backflow protectors for yourself.

Q. I’m sharing a pump; how often should I replace parts?

When you’re sharing a pump, you need to have your own milk collection kit. No method of cleaning or sterilisation can make milk collection kits safe for use by multiple users. That being said, follow the same guidelines as above for when to replace parts based on how frequently you use them.

Q. I’m only pumping a couple times per week – do I really need to replace parts as often as this?

Not necessarily. The above guidelines are recommendations based on two types of pump users: those who exclusively express (moms who use their pumps 6-8 times per day), and those who pump 1-3 times a day (such as moms who pump and work and direct latch feed at home). If you pump less frequently than that, then you may find parts last a little bit longer – BUT, always pay close attention for signs of wear and tear including reduced suction, slurping noises, changes in shape, and tears.

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