O-Ring for HW-303B,403B,703B

Product details

O-Ring for HW-303B,403B,703B is a replacement sealing ring designed for use with Sunsun HW series filter units labeled HW-303B, HW-403B, and HW-703B. Like an O-ring on many aquarium devices, its main job is to help maintain a tight, water-resistant seal between mating parts, which can reduce the risk of minor leaks and help keep the unit operating as intended after wear or removal during cleaning and maintenance.

Features:

• Direct replacement for the sealing ring used on HW-303B, 403B, and 703B filter housings
• Helps maintain a snug fit between parts for a better water seal
• Useful when an old O-ring has hardened, deformed, or no longer seats evenly
• Supports routine maintenance workflows by allowing the seal to be refreshed without replacing the whole unit
• Designed specifically for the referenced HW model series, helping ensure compatibility
• A practical choice for restoring secure assembly after disassembly for cleaning

Specifications:

• Product name: O-Ring for HW-303B,403B,703B
• Category: Replacement Parts
• Compatible equipment (by model): Sunsun HW-303B, HW-403B, HW-703B