You could look in the gardening center. They have diverters for garden hoses (up to 4 way selectable) all ball valve. they are PVC
or plastic (also in brass or zinc planted) You just need the hose ends which they will also probably sell as repair kits for 3-4$.
The best source I've found for aquarium plumbing is Home depots irrigation department. they also have the white with red knob PVC
valves listed above.
120 Gal SW, 150lbs Prem. Fiji, 23Gal Sump, 2x250w 15K MH, 4x65w Actinic
3 x Halichoeres Chrysus (1 surfed), 3 x Nemateleotris magnifica, 1 x Centropyge bicolor, 11 x Scarlet Hermits, 6 x Zebra Hermits, 40 x Astrea Snails, 6 x Nassarius Snails, 3 x Cerith Snails