Collection base – 3 inlet, for solid-wall riser pipe ø 315
K31Z16 - dedicated for ø 160 pipes
K31Z20 - dedicated for ø 200 pipes
Collection base – 3 inlet, for corrugated riser pipe ø 315 (external diameter ø 355)
K35Z16 - dedicated for ø 160 pipes
K35Z20 - dedicated for ø 200 pipes
Collection base – 3 inlet, for solid-wall riser pipe ø 400
K40Z16 - dedicated for ø 160 pipes
K40Z20 - dedicated for ø 200 pipes