This can be fitted over an existing transom drain hole and is a simple device which will allow water to drain off the deck but if water tries to enter the boat, the ball will move into the hole and block it.
The 72mm version uses the same drill pattern as Nuova Rade deck drains with codes 43248, 43251, 43253, 44763, so can be used to replace the rubber flap.
Note that these should be fitted above the waterline.
| Part no. | Diameter | Length | Fits hole |
| 198091 | 72mm | 48mm | up to 40mm |
| 198092 | 114mm | 74mm | up to 75mm |