Valpak V38-140 FNS Plus Top Manifold – Replacement for Pentair DE Filters
Restore Peak Performance to Your Pentair DE Filter
The heart of any DE (Diatomaceous Earth) filter system is the manifold—the part that distributes clean, filtered water evenly across the grid assembly. When this critical component cracks, warps, or clogs, your pool filter can no longer deliver the efficiency and clarity it was designed for. The Valpak V38-140 FNS Plus Top Manifold is a heavy-duty replacement engineered to match Pentair’s original design, ensuring your DE filter works like new.
Made to replace Pentair OEM part #59023300, this manifold is designed to fit Pentair FNS Plus DE Filters, offering both durability and a precise fit. It restores water flow, improves filtration efficiency, and helps extend the life of your filter grids—all while saving you money compared to OEM replacements.
Why Replace a Top Manifold?
Over time, DE filter manifolds are exposed to intense water pressure, debris, and the abrasive nature of DE powder. Common issues include:
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Cracks or Splits – Allow unfiltered water to bypass the grids.
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Warping – Creates uneven pressure, reducing filtration performance.
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Chemical Wear – Chlorine and pool chemicals gradually weaken the plastic.
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Clogging – DE buildup can block passages, restricting flow.
When manifolds fail, you’ll notice cloudy water, frequent backwashing, and uneven DE distribution. Replacing your worn manifold with a Valpak V38-140 restores your filter’s original efficiency and water clarity.
Features and Benefits of the Valpak V38-140
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OEM Replacement Fit – Replaces Pentair part #59023300, designed specifically for FNS Plus DE filters.
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Heavy-Duty Construction – Built from high-quality materials to resist cracking, warping, and chemical wear.
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Precision Water Distribution – Ensures even DE coating on filter grids for maximum clarity.
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Affordable Quality – Engineered as a cost-effective alternative to OEM with equal durability.
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Easy Installation – Drop-in fit requires no modifications.
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Long-Lasting Performance – Extends the lifespan of your DE filter by protecting the grid assembly.
Compatible With
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Pentair FNS Plus DE Filter models
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OEM Replacement Part #: 59023300
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Valpak Part #: V38-140
⚠️ Not designed for other Pentair filter series (such as Nautilus or Quad DE). Always confirm your filter model before purchase.
Installation Instructions
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Turn Off Equipment – Shut down pump and relieve filter pressure.
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Open Filter Tank – Remove the band clamp and lift the lid.
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Remove Grid Assembly – Lift out the entire DE grid set.
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Detach Old Manifold – Disconnect the top manifold from the grids.
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Install New Manifold – Align the V38-140 with grid openings and secure in place.
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Reassemble & Charge – Reinstall the grid assembly, close the filter, and recharge with DE powder.
Tip: Always inspect your filter grids when replacing a manifold. Worn or torn grids should be replaced at the same time for best performance.
Long-Term Value
At $129.95, the Valpak V38-140 offers premium performance at a fraction of OEM pricing. By maintaining proper water distribution, it:
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Prevents premature grid damage
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Reduces backwashing frequency
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Improves energy efficiency by lowering system strain
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Keeps pool water consistently clear
This makes it a smart investment for both residential and commercial pool owners.
Key Features at a Glance
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Valpak Part #: V38-140
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Replaces Pentair OEM #: 59023300
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Fits Pentair FNS Plus DE Filters
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Heavy-duty construction for long life
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Ensures even DE distribution and water clarity
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Affordable replacement without sacrificing quality
Why Choose Benchmark Pool Supply?
At Benchmark Pool Supply, we specialize in carrying the exact replacement parts pool owners need to keep their systems running smoothly. By choosing us, you get:
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Genuine Valpak replacement parts
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Verified compatibility with Pentair systems
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Competitive pricing vs. OEM
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Expert guidance from a trusted pool supply source
When your filter matters, you can trust us to provide the right solution the first time.
FAQs About the Valpak V38-140
Q: Will this fit the Pentair FNS (non-Plus) filters?
A: No. This part is designed specifically for Pentair FNS Plus DE filters.
Q: What is the difference between OEM and Valpak?
A: Valpak manufactures high-quality aftermarket replacements that meet or exceed OEM standards, often at a lower cost.
Q: How do I know if my manifold needs replacement?
A: Signs include cloudy water, uneven DE distribution, visible cracks, or difficulty maintaining pressure.
Q: Do I need to replace my grids at the same time?
A: Not always, but if your grids show signs of tearing, fraying, or age, it’s best to replace them while the filter is open.
Q: Can I install this myself?
A: Yes. If you’re comfortable servicing your filter, it’s a straightforward replacement. If not, a pool service professional can handle installation quickly.
