Unicel 7CH-975 Replacement Filter for Dimension One Spas 752-5015 (1-1

Overview

The Unicel 7CH-975 is a pleated polyester spa cartridge filter element from Unicel's commercial-grade 7CH specialty series, engineered for Dimension One Spas circulation systems utilizing the 1-1/2" SAE threaded interface. The element provides 55 sq ft of effective filtration area through a high-pleat-count Reemay nonwoven polyester media pack with a nominal 15-micron filtration efficiency. End cap construction is reinforced ABS injection-molded with an integrated 1-1/2" SAE male thread bottom and a closed semi-circular top cap; internal core is structural PVC to maintain axial rigidity under sustained spa-pump operating pressures. The element is rated for continuous service to 115°F with intermittent excursions to 120°F acceptable per Unicel test protocol. The 7CH-prefix designation indicates upgraded end cap bonding and fabric specification relative to standard C-series spa elements for extended service life under high bather-load conditions.

Service interval recommendation for spa applications: fresh-water rinse every 2–4 weeks; chemical soak with dilute TSP or commercial enzyme/degreaser cartridge cleaner every 4–6 weeks to remove body oils, lotions, and surfactant residues that water rinsing alone will not clear. Replace the element at ≤ 12-month intervals for typical residential spa use, or earlier if ΔP rises ≥ 5 PSI above clean-filter baseline, if visible fabric tears or pleat channeling develop, or if post-cleaning pressure does not return to baseline. Chemical compatibility: continuous operation at ≤ 10 ppm free chlorine or ≤ 30 ppm total bromine; muriatic acid soak at 1:20 dilution compatible for calcium scale removal (20-minute maximum exposure, thorough rinse before reinstallation); enzyme cleaners compatible without restriction. Verify media ozone compatibility before deployment in ozone-primary sanitization systems. Standard Unicel 90-day manufacturer's defect warranty applies through authorized distribution.

What's Included

Your order includes the selected quantity of replacement spa filter cartridges. Each unit is individually inspected for quality before shipping.