Pentair FullFloXF 4000 Series

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Overview

Function Description
Important Technical Specifications
Usage Features
Maintenance Features

The device is a Pentair FullFloXF® 4000-Series Grid Style D.E. Filter, designed for use in swimming pool applications. This filter is a critical component of a pool's circulation system, responsible for capturing microscopic impurities like dirt, algae, and certain forms of bacteria.

Function Description

The primary function of the FullFloXF® 4000-Series D.E. Filter is to filter pool water using diatomaceous earth (D.E.). Water flows through the filter, and the D.E. coated filter elements trap impurities, returning cleaner water to the pool. The filter operates under pressure, and its design aims to maximize filtration area while minimizing flow restrictions. It includes an integrated backwash valve for cleaning the filter elements by reversing the water flow.

Important Technical Specifications

Maximum Working Pressure: 50 psi. It is crucial never to exceed this pressure, even during hydrostatic pressure tests, as it can lead to component failure and severe injury.
Filter Area (Models):
- XF4048 (P/N 188623): 48 sq. ft.
- XF4060 (P/N 188624): 60 sq. ft.
- XF4072 (P/N 188625): 72 sq. ft.
Vertical Clearance Required for Lid Removal:
- XF4048: 65 inches
- XF4060: 84 inches
- XF4072: 84 inches
Recommended Flow Rates (GPM) and Turnover Capacity (Gallons):
- XF4048 (48 sq. ft.): 96 GPM; 8 hrs: 45,120 gal; 10 hrs: 56,400 gal; 12 hrs: 67,680 gal.
- XF4060 (60 sq. ft.): 120 GPM; 8 hrs: 55,680 gal; 10 hrs: 69,600 gal; 12 hrs: 83,520 gal.
- XF4072 (72 sq. ft.): 144 GPM; 8 hrs: 69,120 gal; 10 hrs: 86,400 gal; 12 hrs: 103,680 gal.
Inlet/Outlet Size: Full 2" for improved hydraulic efficiency.
Diatomite (D.E.) Requirements for Precoating:
- XF4048: 4.8 lbs (10 one-pound coffee cans, level)
- XF4060: 6 lbs (12 one-pound coffee cans, level)
- XF4072: 7.2 lbs (14 one-pound coffee cans, level)
Materials: Curved filter grid elements are designed to maximize filtration area. The internal design minimizes flow restrictions.

Usage Features

Integrated Backwash Valve: The filter includes an assembled 2” rotary backwash valve, simplifying the cleaning process by reversing water flow.
HiFlow™ Manual Air Relief Valve: This valve is designed for rapid air release, a critical safety feature for relieving pressure before servicing. It must be hand-tightened only to prevent damage.
Pressure Gauge: A pressure gauge (P/N 190058) is included and serves as the primary indicator of the system's operation. It must be maintained in good working order, reading zero when pressure is relieved and accurately during operation.
Anchor Clamp Installation (Optional): For high wind and seismically active areas, an Anchor Clamp Kit (P/N 178840) can be purchased separately to secure the filter to the equipment pad.
Start-Up Procedure: A detailed start-up procedure is provided, emphasizing safety steps like relieving pressure, opening the air relief valve, and ensuring the clamp band is correctly fastened before starting the pump.
Diatomite Precoating: The filter requires precoating with diatomaceous earth (D.E.) for proper filtration. The D.E. slurry is introduced into the skimmer while the pump is running, allowing it to be drawn into the filter.
Valve Operation: The integrated backwash valve has two main positions: "Filter" for normal filtration and vacuuming, and "Backwash" for cleaning the filter elements.

Maintenance Features

Filter Cleaning: The filter should be cleaned when the pressure gauge reads 8-10 psi higher than the "Original Starting Pressure" or when a significant reduction in flow is noticed.
Backwashing: The integrated backwash valve allows for convenient backwashing. The process involves turning off the pump, opening the air relief valve, cleaning the pump basket, positioning the valve to "BACKWASH," starting the pump, and closing the air relief valve after a steady stream of water appears. Backwashing typically takes about three minutes.
Manual Cleaning of Filter Elements: For more effective cleaning, especially if backwashing doesn't restore the original pressure, the filter elements can be manually removed and washed with a garden hose.
Acid Soaking: If algae, calcium, iron, or other mineral build-ups are present on the filter elements, acid soaking may be necessary. This involves soaking the elements in a solution of one part muriatic acid to twenty parts water, with specific safety precautions for handling acid.
Cleaning the Separation Tank (if installed): If a separation tank is part of the system, it collects spent diatomaceous earth during backwashing and needs to be cleaned after each backwash. This involves draining the tank, removing the separation bag, disposing of the diatomite, and cleaning the tank and O-ring.
Cleaning the Manual Air Relief Valve: The manual air relief valve should be routinely inspected and cleaned. This involves shutting off the pump, relieving pressure, disassembling the valve stem and cover assembly, cleaning debris, and verifying the air passage and O-ring condition.
Cleaning the Internal Air Bleed Tube: The air bleed tube and screen cap should be routinely inspected and cleaned, typically by rinsing with water when the filter lid is removed for maintenance.
Pressure Gauge Maintenance: The pressure gauge should be replaced if it doesn't read zero when pressure is relieved, doesn't read correctly during operation, or is damaged.
Clamp Ring Inspection: The clamp ring should be checked at least once a month to ensure proper tension, with spring coils touching. If not, the nut should be tightened, and the clamp tapped until the coils touch, but only when the system is off and pressure is relieved.
O-ring Lubrication: Only PTFE or silicone-based lubricants should be used on O-rings to prevent damage.