Bottom drain ventilation cap Ø38cm

Description du produit : 110 mm bottom drain fitted with a cover with rubber membrane for aeration of ponds. The cover has a diameter of 38 cm (pneumatic membrane Ø 34 cm). The recommended air supply is ± 20 liters per meter of water depth. Air hose connection: 9 mm. Type B is made entirely of PVC and has a separate 32mm inlet for a 9mm air hose connection.