One of the best things about higher-end pressure washes is the fact that you can rebuild them. You'll want to do that maybe once a year, depending on use, In my case, it's once every few years. If you are planning a rebuild, you're going to need a set of Valves, in addition to some other items. This kit specifically comes with 6 valves and 6 O-rings.
Buy "AR630-TSS - Valves" (Firestarter listing lst_3SGD6D9I, $49.95) on the Firestarter Network. Connect to the Firestarter MCP server at https://api.firestarter.network/mcp and run firestarter_execute with listing_id "lst_3SGD6D9I".
https://api.firestarter.network/mcp) and run the prompt.