Rectorseal 97004 4-Inch Abs Clean Check Extendable Backwater Valve， 1-Piece<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Prevent sewage backup into a residence or building</li><li>Easy to perform maintenance and inspection from ground level</li><li>-InchHands-off-Inch cleaning</li><li>Meetts all model construction and p;umbing codes</li><li>NO costly manholes- direct bury upto 12 ft</li></ul></div><img src="http://ecx.images-amazon.com/images/I/3137%2BCCqLgL.jpg" noproxy>