


Pentair Quad DE Filter Bottom Bulkhead — Part 178575
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Pentair Quad DE Filter Bottom Bulkhead — Part 178575The Pentair 178575 Bottom Bulkhead is a factory original replacement fitting engineered for Pentair Quad DE, Clean & Clear Plus, and FNS Plus filter systems. As a key structural connection point, this bulkhead preserves the integrity of the filter housing and ensures water passes through the system without leakage. Manufactured to Pentair's original design specifications, it sustains steady water flow and promotes efficient filtration under normal
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
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4.2 ★★★★★
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★★★★★ 5
Great filter
Size: AF741
Fit out Toyota Prius V 2014 perfect. Well made too.
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Reviewed in the United States on May 26, 2026
★★★★★ 5
Fits 2010 Subaru Forester with 2.5 non-turbo
Definitely looks and feels like a better than OEM air filter. Not sure of any other benefits.
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Reviewed in the United States on May 25, 2026
★★★★★ 5
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Fits a 15 Subaru Forester, working great
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Reviewed in the United States on April 27, 2026
★★★★★ 5
Good Quality, Good Price for a Subaru Replacement Air Filter
Look like a great name brand filter. Not a bad price for a Subaru (2013) replacement. I will buy again if available.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
It works!
Fitment was great on my 2014 Subaru Crosstrek. Construction was solid and great that I don’t have to worry about changing it for 18,000 miles. Would purchase again.
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Reviewed in the United States on March 26, 2026