No Image Lote 4490 Drop Through Rotary Valve - Extech EXMV 650/850 Drop Through Rotary Valve, this valve has a weighted 4490Drop Through Rotary Valve - Extech EXMV 650/850 Drop Through Rotary Valve, this valve has a weighted Sanderson Weatherall Drop Through Rotary Valve - Extech EXMV 650/850 Drop Through Rotary Valve, this valve has a weighted bypass flap in the inlet and rotating side pl... Add to watchlist Catalogue Timed