Brass Spring Non-return Valve by Austworld $8.80 13mm - $8.80 20mm - $11.00 25mm - $14.40 32mm - $19.80 40mm - $28.00 50mm - $44.00 13mm 20mm 25mm 32mm 40mm 50mm Size 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart Brass Spring Non-return Valve