Tier1 Spa Filter Cartridge Replacement for Waterway Teleweir 35 SF - 2-Pack, High-Flow Trilobal Media

Tier1 replacement cartridges for the Waterway Teleweir 35 SF provide a direct, high-flow swap that restores spa filtration and captures more debris without reducing circulation.

These Tier1 twin-pack filter cartridges are designed as drop-in replacements for a wide range of Teleweir-style spa filters. Built to match the 9-1/4" x 4-15/16" footprint and fitted with a reinforced core, they help preserve pump efficiency while removing hair, dirt, leaves and fine particles. Independently tested to NSF 50 protocols, the media and construction prioritize reliable service life and consistent water flow.

Will this Tier1 cartridge fit my existing Teleweir 35 SF housing?

Yes — the cartridge matches the common Teleweir 35 SF dimensions and connector style for a straightforward swap. Check your filter length and diameter to confirm compatibility before ordering.

• Nominal size: 9-1/4" length by 4-15/16" diameter
• Direct replacement for Waterway 817-4035 and Teleweir 35 SF
• Also fits Pleatco PWW35L, Unicel 4CH-935 and listed equivalents

How does the filtration media perform compared with standard filters?

The Tier1 cartridge uses trilobal fiber media that increases particle capture surface area versus round fibers. That geometry traps more debris while preserving flow, helping maintain pump and heater performance under normal spa conditions.

• Trilobal dirt-lock fibers capture up to 40% more debris than standard round fibers
• Designed to catch hair, leaves, body oils and fine particulates
• Media engineered to resist compaction and preserve circulation

Will using these cartridges affect pump or heater operation?

No — these cartridges are built around a high-flow internal core to deliver steady circulation without restricting pressure. Proper flow reduces strain on pumps and avoids the flow-related heater shutdowns that can happen with poorly designed replacements.

• High-flow core maintains consistent water movement
• Reinforced construction resists collapse under normal system pressures
• Helps protect pump longevity by avoiding restrictive flow losses

Are these Tier1 filters durable and safe for spa systems?

Yes — the cartridges have undergone independent testing to NSF 50 standards for filtration performance and durability. The materials and assembly are selected for repeated wet/dry cycles typical in spa environments.

• Tested to NSF 50 protocols for reliable performance
• Robust end caps and core for long service life
• Sold in a convenient 2-pack to simplify scheduled replacements

Who is this for: These Tier1 replacement cartridges are intended for spa owners and service professionals who need a dependable, drop-in alternative to Teleweir 35 SF filters. They suit anyone seeking improved debris capture without sacrificing flow — ideal for routine maintenance, seasonal refreshes, or stocking replacement filters for multiple spa units.