Outdoor Water Solutions ARS0027 Airstone Foot Valve<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Also called an inline backflow valve</li><li>Note: shallow or larger ponds may require multiple airstone diffuser kits.</li><li>Made in U.SA.</li><li>ARS0027</li><li>Also called an inline backflow valve</li><li>Note: shallow or larger ponds may require multiple airstone diffuser kits.</li><li>Made in U.SA.</li></ul></div><img src="http://ecx.images-amazon.com/images/I/312j4706lQL.jpg" noproxy>