Product Overview

Restore the strength, support, and sealing performance of your filter system with the Pentair 170017 FNS Plus Tank Bottom Assembly. Designed for the Pentair FNS Plus 48 sq. ft. D.E. filter, this genuine replacement tank bottom helps maintain proper filter structure, water flow, and pressure containment.

The tank bottom is a critical part of the filter body. If the original tank bottom is cracked, leaking, warped, or damaged, replacing it with the correct Pentair assembly can help restore safe and reliable filter operation without replacing the entire filter system.

Genuine Pentair Replacement for FNS Plus 48 Sq. Ft. Filters

The Pentair 170017 is an OEM replacement tank bottom assembly made for FNS Plus FNSP48 D.E. filters. It is designed to match the original filter body for proper fit, dependable sealing, and long-lasting performance.

Designed to Restore Filter Housing Integrity

A damaged filter tank bottom can cause leaks, pressure loss, and reduced filtration performance. The Pentair 170017 replacement assembly provides the lower housing structure needed to support internal filter components and maintain proper system operation.

Compatible With

• Pentair FNS Plus 48 sq. ft. D.E. Filter
• Pentair FNSP48 Filter Model
• Pentair FNS Plus Pool and Spa D.E. Filters

Why Choose the Pentair 170017?

Genuine OEM Fit

Manufactured by Pentair for the FNS Plus 48 sq. ft. D.E. filter, helping ensure correct fit and compatibility.

Restores Filter Structure

Replaces a cracked, leaking, or damaged tank bottom to help restore the filter housing.

Helps Prevent Leaks

A properly installed tank bottom assembly supports a secure, pressure-resistant filter seal.

Supports Proper Water Flow

Helps maintain correct internal alignment and flow through the filter system.

Includes Standpipe

Designed as a tank bottom assembly and commonly listed with the standpipe included.

Key Product Features

• Genuine Pentair replacement tank bottom assembly
• Fits Pentair FNS Plus 48 sq. ft. D.E. filters
• Designed for FNSP48 filter models
• Helps restore filter housing integrity
• Supports proper pressure and water flow
• Replacement for cracked, leaking, or damaged tank bottoms
• Durable construction for pool and spa filter applications
• Commonly used in filter repair and restoration projects

Product Benefits

Extends Filter System Life

Replacing the damaged tank bottom can help avoid the cost of replacing the full filter system.

Helps Maintain Safe Filter Operation

A sound tank bottom helps support proper pressure containment and reduces the risk of leaks.

Improves Reliability

Restoring the filter housing can help improve filtration consistency and system performance.

Ideal for Professional Repairs

A dependable replacement part for pool service technicians and experienced pool owners repairing FNS Plus D.E. filters.

Specifications

Installation & Care Tips

Before servicing the filter, turn off the pool pump, relieve all filter pressure, and follow the manufacturer’s safety instructions. The tank bottom assembly is part of the pressure vessel, so installation should be performed carefully to ensure proper alignment, sealing, and reassembly.

Inspect the tank clamp, O-ring, internal components, bulkhead fittings, and sealing surfaces during replacement. Replace any worn or damaged related parts before restarting the system.

After installation, restart the system according to the filter manual and check carefully for leaks, pressure changes, and proper water flow.

Customer-Facing Q&A

Q: Will this fit my Pentair FNS Plus 48 sq. ft. filter?
A: Yes. The Pentair 170017 is designed for the Pentair FNS Plus 48 sq. ft. D.E. filter, model FNSP48.

Q: What is the SKU for this tank bottom assembly?
A: The SKU is 170017.

Q: What is the barcode for this product?
A: The UPC / Barcode is 788379670771.

Q: Is this a genuine Pentair replacement part?
A: Yes. This is a genuine Pentair replacement tank bottom assembly.

Q: Does this include the standpipe?
A: Yes. This tank bottom assembly is commonly listed with the standpipe included.

Q: When should I replace the tank bottom assembly?
A: Replace it if the tank bottom is cracked, leaking, damaged, warped, or no longer sealing properly under pressure.

Q: Can I install this myself?
A: Because this part is part of the filter’s pressure vessel, installation should be done carefully according to the manufacturer’s instructions. When unsure, use a qualified pool service professional.