FitMatch
Spectra backflow protector diaphragms (2-pack)

Breast pump valve

Spectra backflow protector diaphragms (2-pack)

SPEC-BF-MEM

Fits 6 models · replace every 2 months

Wrong part, or your model missing? Tell us. A person checks every report.

Genuine

$5.50 each

2-pack $11.00

Spectra Baby Australia · 1 Nov

Compatible

$3.75 each

4-pack $14.99

Amazon AU · 28 Oct

Check seller

Genuine: made by Spectra. Compatible: another brand.

Lowest compatible · $3.75 each · 4-pack $14.99

Amazon AU. Compare with genuine below. Some links earn us a commission.

Open Amazon AU

Compare 2 sellers

AUD, before delivery. Each price shows when it was checked.

Amazon AUCompatible · checked 28 Oct$3.75 each4-pack $14.99Open
Spectra Baby AustraliaGenuine · checked 1 Nov$5.50 each2-pack $11.00Open
Open cheapest seller · $3.75 each · 4-pack $14.99

Opens Amazon AU in a new tab. Their page is the source of truth for price, delivery and returns.

Not due yet?

Get a nudge when your breast pump valve is due — it's every 2 months. One email two weeks before, no newsletter. Manage or stop it anytime.

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How to change the SPEC-BF-MEM breast pump valve

Watch the guide or follow the steps.

Assembling the S1 or S2 Pump Parts & Accessories · Spectra Baby USA (official)
  1. 1Wash your hands, take the backflow protector off the breastshield and pull its two pieces apart.
  2. 2Lift out the old diaphragm.
  3. 3Sterilise the new diaphragm before first use and let it dry completely.
  4. 4Insert the diaphragm into the bottom piece (the one that joins the breastshield) so it sits snugly, and curl its lip around the rim.
  5. 5Press the top piece over the bottom piece and diaphragm, then refit the protector and tubing.
Every number this part goes by
Retail name:
SPEC-BF-MEM
Retail name:
Spectra backflow diaphragm
Retail name:
Spectra backflow membrane

Sellers list any of these; they are the same part.

Will it fit your appliance?

Type your model number and we'll check it against the makers' lists.

Fits these 6 Spectra models
Common questions
What does the SPEC-BF-MEM fit?
The Spectra backflow protector diaphragms (2-pack) (part SPEC-BF-MEM) fits 6 Spectra models, including the 9 Plus, Dual Compact and Dual S. Every one is listed on this page.
How often should I replace the SPEC-BF-MEM?
Every 2 months, or sooner if it looks worn.
Where can I buy the SPEC-BF-MEM in Australia?
We track 2 Australian sellers for the SPEC-BF-MEM; the lowest listed price when we last checked was A$3.75 at Amazon AU. Prices are re-checked daily and dated on this page.
How do I fit the SPEC-BF-MEM?
No tools, a few minutes: 5 steps, listed on this page with the replacement video where the maker has one.
What happens if I don't change it?
A stretched or torn valve or membrane lets the suction drop, so each session takes longer.
Is there anything to reset afterwards?
No reset: the pump has no reminder for this part, so set your own.

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