Zodiac - Upper housing assembly, CS100 - R0461901

Zodiac – Upper housing assembly, CS100 – R0461901

The Zodiac R0461901 is an original replacement upper housing assembly designed specifically for the Zodiac CS100 pool filter system. As a genuine OEM spare part, this component forms the structural upper section of the filter tank, enclosing and protecting the internal filtration media and ensuring a watertight seal during operation. The upper housing plays a critical role in maintaining the integrity of the filtration circuit, preventing leaks and ensuring that pool water is directed correctly through the filter bed before being returned to the pool.

Choosing an original Zodiac replacement part guarantees precise dimensional compatibility with the CS100 filter body, ensuring that threads, sealing surfaces, and connection points align perfectly. This eliminates the risk of improper fitment that can arise with non-genuine alternatives, protecting both the filter and the wider circulation system from potential damage or inefficiency.

Technical details and construction

The upper housing assembly for the CS100 filter is manufactured to Zodiac’s exacting quality standards, using robust materials suited to the wet, chemically active environment of a swimming pool plant room. The component is designed to work in conjunction with the tank O-ring (R0462701) and the inlet diffuser and locking tab kit (R0462101), which are related service parts available separately and commonly replaced at the same time during maintenance. The upper housing integrates the inlet port and internal diffuser seat, which distributes incoming water evenly across the filter media for consistent filtration performance. Its design ensures compatibility with standard filter plumbing connections used on the CS100 system, simplifying reinstallation during a service or repair procedure.

Suitability and application

This upper housing assembly is intended exclusively for use with the Zodiac CS100 sand or media filter. It is suited to residential and light commercial swimming pool installations where the CS100 filtration system is already in place. This part is the correct choice when the existing upper housing shows signs of cracking, thread damage, seal surface deterioration, or any structural failure that compromises filter performance. As with all pressure-side filter components, replacement should be carried out by a qualified pool technician, with the system fully depressurised before disassembly. If you are unsure whether this is the correct part for your filter, cross-reference your filter model label and compare the SKU against your original equipment documentation or the Zodiac 2020 parts catalogue.