Hi, Does anyone know a website or a phone number to get a Richdel instruction manual for a sprinkler system?

Here is an example (https://www.lawngeniestore.com/Comergent/en/US/StaticContent/LawnGenie/product_manuals/Product%20Manuals/R406DLG.pdf) using a Google Search (https://www.google.com/search?rlz=1C1SKPC_enUS365US368&aq=f&sourceid=chrome&ie=UTF-8&q=Richdel+Sprinkler+Manual). The best bet is to add the model number to this search and you should be able to find the manual.

There are plenty of PDF manuals online for this company.