On Tap Fourways has a dedicated and experienced team of plumbing experts. It is headed up by Gerard van Niekerk. The branch can be located at 42 Witkoppen Rd, Intersection Kingfisher & Witkoppen Rd, Fourways. On Tap Fourways. As with all the other On Tap branches, it offers you the best in plumbing, bathroom and sanitary ware. Each branch is living up to the On Tap promise of superior quality and expert advice.