Description Plastic Vacuum Switch for Englander pellet stoves. Replaces. PU-VS. OEM. Will retro-fit to older (metal) type switches in older model Englander pellet stoves. For pellet stove models 2006 and later use one CU-VS switch and one PU-VS switch. Pre 2006 models use 2 PU-VS switches. This switch senses exhaust vacuum so if the exhaust blower looses power or fails then it will stop the top auger from feeding pellets. Fits the following models: 25-PDVC, 55-SHP10 and 55-SHP10L, American Standard and 55-TRP10 25-PDV, 25-PDVP, 55-SHP15, 55-SHP22 and 55-SHP22L, 55-TRP15, 55-TRP22, American Heritage and US 25-5670 Parts 25-PI, 55-SHP20 and 55-TRP20 Parts 91200 SAME DAY SHIPPING ON ORDERS PLACE BEFORE 2:00PM EASTERN TIME Next day air shipping for Saturday delivery note to all buyers: All orders placed on Fridays will arrive the following Monday/Tuesday depending on location or holiday schedule. does not provide that shipping option. Thank you for your business 24/7 Parts