Tier1 Spa Cartridge Replacement for Teleweir 35 SF - 2-Pack 9-1/4" x 4-15/16" Trilobal Media, High-Flow Core

Tier1 Replacement for Waterway Teleweir 35 SF Filter (2pk) is a pair of 9-1/4" x 4-15/16" spa cartridges engineered to trap more debris while maintaining steady water flow.

This two-pack of Tier1 replacement cartridges is built to fit popular Teleweir-style filtration housings and compatible part numbers from Pleatco, Unicel, Baleen and Waterway. The filters use a trilobal fiber media that increases surface area and captures finer particles than conventional round-fiber cartridges. Tested to NSF 50 protocols, these replacements are dimensioned and reinforced to preserve pump performance and simplify routine maintenance.

Will these cartridges fit my Teleweir 35 SF system?

These Tier1 cartridges match the common Teleweir 35 SF profile and are dimensioned to replace several OEM and aftermarket part numbers. Measure your existing cartridge to confirm compatibility before ordering.

• Dimensions: 9-1/4" height × 4-15/16" outer diameter.
• Compatible cross-references: Pleatco PWW35L, Unicel 4CH-935, Waterway 817-4035, Baleen AK-90082, PLF4CH-935.
• Two cartridges per pack for simultaneous replacement or spare stock.

How does trilobal dirt-lock media improve filtration?

The trilobal fiber shape increases the media surface area and creates more effective particle-capture points than round fibers. That design helps trap hair, fine silt and leaves without excessively restricting flow, extending time between cleanings.

• Captures up to ~40% more debris versus round-fiber alternatives.
• Improved dirt-holding capacity reduces maintenance frequency.
• Maintains higher open flow to protect pumps and heaters.

Will these filters affect pump or heater performance?

Tier1 cartridges are engineered with an internal high-flow core to sustain steady circulation while filtering effectively. Properly sized filtration prevents undue strain on pumps and avoids common flow-restriction problems that can impact heater operation.

• Internal core designed for consistent water throughput.
• Balanced media density for filtration without excessive pressure drop.
• Reduces risk of cavitation or heater shutoff caused by clogged filters.

Are these filters durable and safe for commercial or residential pools and spas?

These Tier1 cartridges have been independently tested to NSF 50 performance standards, indicating reliable structural and filtration properties for spa applications. Durable construction supports repeated cleanings and routine handling in both home and light commercial settings.

• NSF 50 tested for consistent filtration results and durability.
• Robust media and endcaps built to withstand multiple cleaning cycles.
• Two-pack supply helps maintain uninterrupted filtration during service.

Who is this for: The Tier1 Replacement for Waterway Teleweir 35 SF Filter (2pk) is intended for spa and hot tub owners, service technicians, and pool retailers who need a reliable, cost-effective replacement that matches common Teleweir 35 SF cartridges. Choose this two-pack when you want improved debris capture, measured fitment for Teleweir-style housings, and NSF-tested performance without changing your system plumbing or pump settings.