36 / 80 36 x21 original 5000 l/h 2500 l/h 500 l/h 315 l/h 160 l/h 1800 l/h 1250 l/h 1000 l/h 800 l/h 650 l/h 500 l/h 400 l/h 230 l/h 315 l/h 160 l/h 80 l/h 40 l/h 5000 l/h 2500 l/h 1800 l/h 1000 l/h 7000 l/h 4000 l/h 2000 l/h 1000 l/h 7000 l/h 4100 l/h 1900 l/h 1?2. handle, round 3?4. handle, oval 5. coupling nut 10. non-return valves 6?7. cap nuts 8?9. hose fittings 12. flexible