Maymom Backflow Protector for Spectra breast pump

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$13.95 $16.50

Maymom Backflow Protector for Spectra Breast Pump is designed to work with the flanges of Spectra S1, Spectra S2, 9 Plus, Q Breast pump. Maymom's backflow protector can replace both Spectra's new and old versions of backflow protectors. 

What we like:
  • Replace both Spectra's new and old versions of backflow protectors
  • Prevent milk to enter the tubing, and thus it minimizes mold growing and protects your pump motor.

Works with:

  • Spectra S1
  • Spectra S2
  • Spectra 9+
  • Pumpables universal narrow neck breastshield with shield adapter

Tip: Backflow protector diaphragms need to be replaced every 3 to 6 months

What's included in each pack:

  • 2 x backflow protector


  • FDA registered medical devices.
  • Can be sanitized with boiling water or water steam. 
  • Made of Silicone - BPA free, and DEHP free

A breast shield or flange is the funnel on a breast pump that attaches to your breast and draws the nipple out, creating suction and allowing your milk to flow out of your breasts and into the storage bottle. Some breast shields, the funnel and the bottle connector are joined seamlessly as a one-piece, known as the flange.

The size of the breast shield is express in terms of millimeters (mm). This usually refer to the measurement of the opening at end of the funnel towards the tunnel.  

Finding the Right Fit: 

In order to find your optimal breast shield size, you can measure your nipple diameter:

  1. Using a ruler or measuring tape, measure the diameter of your nipple at the base (across the middle, diameter) in millimetres (mm). Do not include your areola.
  2. Add 2 to 4 mm to your measurement when selecting your breast shield size.

If you have already started pumping, please measure after a pumping session.

You can also download this ruler, print and cut out the ruler to measure your nipple diameter.

Am I using the correct breast shield size?

If you answer yes to one or more of the following questions, you may be using the incorrect breastshield size.

- Do you feel discomfort when pumping?

- Does your nipple rub against the side of the flange?

- Do you see excess areola pulled into the flange?

- Do you see any redness of whiteness?

- Do you feel unexpressed breast milk after pumping?

A good fitting breast shield should give you a gentle, rhythmic pulling during expressing, and your breast should feel empty and soft once you’re finished. Pumping breast milk should never be a painful experience.

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