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50 and 100 Sqft Clean & Clear Tank Lid

Restore the airtight seal of your pool filtration system with this heavy-duty replacement tank lid. Specifically engineered for 50 and 100-square-foot cartridge filter housings, this high-impact, chemical-resistant lid ensures a secure fit for optimal pressurized performance. Designed with a reinforced top-mount port for air relief valves and pressure gauges, it provides the durability needed to withstand high-pressure environments. Whether replacing a cracked shell or upgrading an aging system, this precision-molded lid provides a leak-proof solution to keep your pool water crystal clear.

Specifications

Replacement Filter Tank Lid (50 & 100 Sq. Ft.)

Heavy-duty upper tank shell engineered for 50 and 100 sq. ft. cartridge filter housings. Precision-molded from glass-reinforced thermoplastic to provide a leak-proof, high-pressure seal for optimal filtration performance.

Application 50/100 Sq. Ft. Filters
Material Reinforced Thermoplastic
Top Port Pre-threaded (1/4" NPT)
Diameter Approx. 13" - 14"
Finish UV-Resistant Textured
Locking Style Nut / Tension Ring Ready
O-Ring Ref. O-343 (87300400Z)
Compatibility Post-Nov 1998 Models

Safety Warnings & Critical Maintenance

Explosion Risk: NEVER remove the lid while the pump is running. Turn off power and bleed pressure through the air relief valve until the gauge reads zero.
Hand Tighten Only: Do not use mallets or wrenches to secure the locking ring; excessive force can crack the thermoplastic threads.
Chemical Exposure: Do not store pool chemicals near the tank. Corrosive fumes can weaken the housing, leading to catastrophic failure under pressure.
?? Pro-Tips for a Leak-Proof Seal
  • The O-Ring Secret: Clean the tank O-ring and apply a non-petroleum (PTFE) lubricant before every installation to ensure a vacuum-tight seal.
  • Clean the Seat: Wipe the rim of the bottom tank half before seating the lid; even a single grain of sand can cause a slow drip.
  • Essential Hardware: Compatible with Air Relief Valve (98209800), Pressure Gauge (190058Z), and Locking Nut (59052900).
  • Compatibility: Sized strictly for small-format 50/100 sq. ft. tanks. Not compatible with 125, 150, or 200 sq. ft. models.
Technical Note: This item includes the upper tank shell only. Gauges, valves, and O-rings are sold separately. Professional installation is advised due to the high-pressure nature of pool filtration.

User Disclaimer: Verify filter base dimensions before purchase. Incorrect sizing or improper sealing can result in severe equipment damage or personal injury during system startup.
178553

50 and 100 Sqft Clean & Clear Tank Lid

$172.00
Shipping calculated at checkout.

Pentair

Pickup available at Marathon FL

Usually ready in 24 hours

Secure checkout — all major payment methods accepted