Mind the drought and fix your leaky sprinklers! http://www.californiadrought.org/ This is a 3/4" ID Female x 5/8 OD male fitting. Printing: Recommend ABS w/high density fill. I've designed it print without support. Finish w/acetone bath to close any holes. Happy gardening. Hope your grass stays greener than mine - sigh! Please, click the like button if you like it! And let us know if it works or not for you. Thanks!