Irritrol 100232-H for 204 / 205 Valves and Richdel Diaphragm Assembly
RICHDEL 446PRI INSTALLATION AND OPERATING MANUAL Pdf Download | ManualsLib
Richdel 500PR Irrigation Controller, Not Tested, Salvage
Richdel R-204 Sprinkler Valve Repair - Replace Diaphragm with a new part from the Irritrol 205 valve - YouTube
TruBlue Irrigation - This week I've been starting to replace a number of these old irrigation relics... these controllers still work but are both over 20+ years old and the new controllers