Polaris Zodiac 360 26' White Feed Hose (9 100 3100) jacuzziwhirlpool A check valve is useful A check valve is useful because it helps limit unwanted backflow and supports more stable system behavior when circulation stops or flow direction changes The Hayward compact two port PVC valve is designed for compatible plumbing applications where straightforward shutoff or inline flow control is needed this feed hose helps support dependable cleaner operation and stronger long term serviceability This part has practical value because the 26 foot length helps preserve the intended hose configuration in supported 360 cleaner systems