Clean pump parts keep your baby safe. Milk on pump parts grows bacteria fast. Do this after every session. These steps work for all breast pumps. They follow NHS and CDC rules.
Which parts need cleaning
Not all parts need the same care. Split parts that touch milk from parts that don’t.
Parts that touch milk (clean after every session):
- Flanges
- Valves and membranes
- Collection bottles
- Tubing (if milk goes into the tube)
Parts that don’t touch milk:
- Motor unit. Wipe it with a wet cloth if it gets dirty. Never put it in water.
- Tubing. If no milk goes in, you don’t need to clean it every time. If you see water or milk inside, rinse it and hang it to dry.
Step 1: Rinse with cold water first
Take parts off the pump. Rinse everything with cold water right away. Hot water makes milk protein stick. Rinse until you see no milk left.
Step 2: Wash with hot soapy water
Fill a clean basin with hot water and dish soap. Use a basin just for pump parts. Don’t use the same one for dishes. Wash each part well. Use a bottle brush inside flanges and bottle necks. Clean the ridges where milk hides.
Rinse under cold running water. Remove all soap.
Step 3: Dry thoroughly
Put parts on a clean paper towel or drying rack. Don’t use a cloth towel. Cloth towels carry bacteria.
Let parts air-dry fully. Don’t wipe them dry. This adds bacteria from the cloth.
When to sterilise
Wash pump parts after every session. You don’t need to sterilise after every session. NHS rules say washed and dried parts are clean enough for healthy babies.
Sterilise once a week at least. Sterilise before first use. Sterilise if you or your baby were sick. Sterilise if parts fell on the floor.
Methods for sterilising:
Steam steriliser. Put clean dry parts in a microwave or electric steam steriliser. Follow the maker’s instructions for time and water.
Boiling. Put parts in boiling water for five minutes. Use tongs to take them out. Don’t boil silicone parts too often. It breaks them down faster.
Sterilising solution. Mix sterilising tablets with cold water. Follow the packet directions. Put all parts in for the set time (usually 30 minutes). No rinse needed after. The mix is safe for babies if you mix it right.
Always check your pump maker’s rules before you sterilise. Some parts don’t work with every method.
Storing clean parts
Store clean dry parts in a sealed container or zip-lock bag. Keep them in a cool dry spot. Don’t store them near a sink or in a damp bathroom.
Don’t store wet parts. Wet parts grow bacteria even when they are clean.
When to replace pump parts
Silicone valves and membranes wear out. Replace them every two to three months with daily use. Worn valves lose suction and slow pumping down. Collection bottle valves are cheap. Keep spares.
Replace parts right away if you notice:
- Weaker suction even though the pump is clean and put together right
- Cracks or colour change in the membrane
- A milk or odd smell from parts after cleaning
Tubing with condensation
Water builds up inside tubing sometimes. This is normal. It does not mean milk went into the tube. Run the pump with tubes on but no flanges for one to two minutes. This dries the water out. If milk does go into the tubing, take it apart and hang the tube to dry fully.
New to electric pumping? Our guide to using an electric breast pump covers setup and flange sizing.
ZUZU.LK stocks breast pumps with replacement parts in Sri Lanka. Parts and starter pumps are available. Every pump comes with a 6-month warranty. Islandwide delivery in 2 to 3 working days. Cash on delivery available.
If you have concerns about pump hygiene for a premature or immune-compromised baby, follow your neonatal unit’s specific cleaning guidance.
Frequently Asked Questions
Can you clean breast pump parts in a dishwasher?
Some parts are dishwasher safe. Check your pump manual. Most flanges and collection bottles go on the top rack. Valves and membranes are too small. They can warp in the heat. Hand washing is safer for small silicone parts.
Do you need to sterilise a breast pump after every use?
No. Healthy full-term babies don’t need sterilised parts after every session. Sterilise once before first use. Then once a week. If your baby is premature or sick, follow your neonatal unit’s rules.
Does the pump motor unit need to be cleaned?
Never put the motor unit in water or under a tap. Wipe the outside with a wet cloth only. Water inside breaks the motor for good. Only the milk-touch parts need washing. These are flanges, tubing, valves, and bottles.
When should breast pump parts be replaced?
Replace valves, membranes, and tubing every two to three months with regular use. If suction feels weak but the motor runs fine, worn parts are the cause. Look for cracks, cloudiness, or colour change on all silicone parts.