Pentair Clean & Clear Plus Top Manifold Assembly 170027 — OEM replacement, restores flow & seal

Pentair 170027 is the top manifold assembly designed to replace the original top manifold on Clean & Clear Plus pool and spa cartridge filters, restoring proper flow and sealing for efficient filtration.

If your Clean & Clear Plus cartridge filter is showing uneven flow, bypassing dirt, or leaking around the top lid, the top manifold assembly is a common wear item that can fix those issues without replacing the whole filter. This OEM Pentair part (part number 170027, catalog 4654-76) directly replaces the factory top manifold to reconnect cartridge elements, align internal outlets, and ensure a solid top seal. Installing the correct replacement piece returns your system to manufacturer specifications so it performs as intended.

How will replacing the top manifold improve my filter's performance?

Over time the manifold can crack, warp, or lose sealing surfaces, causing loss of pressure, poor circulation through the cartridges, or leakage. Replacing the manifold restores the internal flow paths, ensuring water is routed through each cartridge evenly and that contaminants are captured properly.

• Re-establishes equal flow to all cartridge elements
• Stops leaks at the filter top and reduces water loss
• Prevents bypass that reduces filtration efficiency

Is this Pentair 170027 part easy to install and does it fit my Clean & Clear Plus filter?

This top manifold assembly is an OEM replacement built to match Clean & Clear Plus dimensions and connection points, so fit is straightforward for compatible models. Basic tools and removal of the filter lid and old manifold are typically all that’s required; many pool owners can complete the swap in a single maintenance session.

• OEM part number 170027 (catalog 4654-76) for direct compatibility
• Requires standard hand tools and basic mechanical steps
• Quick swap work — usually under an hour for experienced users

What should I inspect before and after installing the new manifold?

Before installing, check cartridge condition, O-rings, and lid components so the new manifold isn’t compromised by other worn parts. After installation, pressurize the system slowly while watching for leaks, and confirm consistent pressure and flow through the filter.

• Inspect cartridge pleats for damage or excessive dirt
• Replace worn lid O-ring to ensure a solid seal
• Run the pump and check for steady pressure and no visible leaks

Will replacing the top manifold extend the life of my cartridge filter?

Swapping a damaged manifold removes a common failure point and helps the cartridges perform as intended, which can extend usable life and maintain water clarity. However, overall lifespan depends on cartridge maintenance, water chemistry, and regular inspections.

• Restores proper flow to reduce uneven cartridge wear
• Helps maintain filtration efficiency with regular cleaning
• Works best alongside scheduled cartridge replacement and water care

Who is this for: The Pentair 170027 top manifold assembly is aimed at pool and spa owners, service technicians, and maintenance professionals who have Clean & Clear Plus cartridge filters and want an OEM replacement part to restore correct operation. It’s ideal if you are troubleshooting leaks, low filtration pressure, or uneven flow without replacing the entire filter tank. If you keep up with routine cartridge care and need a reliable factory-fit manifold, this part returns your system to Pentair specifications and helps preserve water quality.