Click to expand Tap to zoom Clunk Click Fittings For 3 Stage Dechlorinator by Elite Koi Ltd Save £-4.95 £4.95 | / 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 2 x 1/2" BSP threaded connections. 2 x Hozelock type clunk click male fittings.