We stock both RX Plastic and Hansen Low Density Alkathene fittings. Both are NZ made and well proven in the field with low density pipes and soft walled, flexible hoses.
These are designed with a barbed hose tail end that inserts into pipe and an exterior tapered collar, which when tightened, cuts a thread into the pipe and grips securely. Not suitable for hard walled pipes.
Measured by the internal bore of pipe and traditionally in imperial measurements with tolerance to accommodate many variations.
15mm (12mm bore), 20mm (18mm bore), 25mm(24mm bore), 32mm(30.5mm bore), 40mm (36.8mm bore), 50mm(49.5mm bore)