Eastern Penn Supply 55 West Street Tunkhannock PA 18657 EPSCO has grown to be one of the largest wholesale distributors in the Eastern Pennsylvania area. In 2017 EPSCO joined Hajoca Corporation the nations largest privately held wholesale distributor of plumbing heating and industrial supplies. AREAS SERVED: EPSCO has plumbing and HVAC supply houses throughout Pennsylvania. BRANDS CARRIED: EPSCO carries name brands such as Amtrol AO Smith Burnham Diversitech Luxaire New Yorker Petite Samsung Southwark Taco TracPipe Viega Honeywell and many more.