Wirthco Engineering, Inc. is entering our third decade as a prime manufacturer of practical products for making life easier and safer - at home, in the workplace, on the road in your RV, in the campground, and on the water. We are grateful for valued employees and customers, and we are dedicated to continuing growth based upon integrity and service. We are also proud of our heritage of providing innovative quality products for motorhome or RV travellers. WirthCo is the premier provider of Battery Doctor? & Funnel King? products. We also provide a full line of batteries, funnels & accessories.