3M Filtrete 1550 Series Deep Pleat 4" Air Filters 2 pk
No item number recorded · OtherNext expected Nov 21 – Dec 5, 2026
The short versionEarly signal
Goes on sale about every 2 months. Typically $10 off. Next expected Nov 21 – Dec 5, 2026. Based on only two sales, treat this as a rough guide.
Seen on sale 2 times.
Sale timeline
● sale (height = discount)○ unsure reading┆ today▮ predicted window
Full history
| Dates | Discount | Sale price | Source |
|---|---|---|---|
| Sep 22 – Oct 19, 2025 | $10 off unsure | — | Costco October 2025 |
| Jul 30 – Aug 24, 2025 | $10 off unsure | — | Costco August 2025 |