


FC-0172 Replacement Pool Filter Cartridge - 50 Sq Ft
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
FC-0172 Replacement Pool Filter Cartridge - 50 Sq FtReplacement swimming pool filter cartridge element. Specifications Type Filter Cartridge Filtration Area 50 sq ft Top Type Handle Top Diameter 1 1 2" Length 4 15 16" Media Weight 3 oz MPN FC 0172 Cross References 447707, 4CH 949, 645544001726, FC 0172 HB, P4CH 949, PLE 051 9693, SC757
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4.5 ★★★★★
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Product Reviews
★★★★★ 5
Very Expensive
Had one cylinder misfiring so replaced coil and spark plug. Runs fine now, but old plug looked shot after only 5 months so I think the coil was the problem. Really good plug so far but very expensive.
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Reviewed in the United States on February 12, 2026
★★★★★ 5
A reliable set of spark plugs.
They’re made in Germany, what else can you say
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Reviewed in the United States on April 24, 2026
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
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Reviewed in the United States on April 29, 2026
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them.
The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine.
Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Upgrade from OEM
After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is.
These were an upgrade from OEM parts. They were gapped perfectly for the car.
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Reviewed in the United States on February 11, 2026