Question
Our Richdel Irrigation System is approximately 16 year old.
Unfortunately the Manual has been lost.  We would appreciate finding a manual to cover  our 6 zone system.
Thanks for your help.

Answer
Hi George

Richdel has been long out of the irrigation marketplace, however if you follow this link, they appear to have some manuals available online.

http://www.coastwaterworks.com/irrigation_3/controller_manuals.htm

and

http://www.basicirrigation.com/index.php?cPath=173

Good Luck

Tony