Watts 0887703 Repair Kit<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Fits 1/2" - 3/4" Watts 800M4 PVB Lawn Sprinkler Backflow</li><li>check disc assembly (disc &amp; disc holder)， bonnet O-ring and check spring</li><li>float vent disc assembly (vent float， seal &amp; spring) and bonnet O-ring</li></ul></div><img src="http://ecx.images-amazon.com/images/I/31wX1PjRN6L.jpg" noproxy>