Radiator flush kit

Has anyone employed this yellow plastic kit for flushing their cooling system before vacuum filling it? If so, which hose (perhaps the heater hose?) should be severed to install the hose adapter? My approach involves removing the lower hose to drain the old coolant into a suitable container for proper disposal. I intend to conclude with a final flush using distilled water for added safety. Experts, please advise if I’m proceeding incorrectly!

Thanks for reaching out.

Flushing your cooling system with a kit and then vacuum filling it sounds like a thorough approach.

It helps remove rust, scale, and other gunk that can build up over time. This build-up can reduce your engine’s ability to stay cool, potentially leading to overheating.