Sunken Hanse

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   Some salutary lessons from Saba and Lukemi.  In both cases the standard bilge pump seems to have been as much use a motorbike's ashtray and I know from my own (comparatively minor) flood that the pump is sited quite high above the lowest point on a 400, thus delaying any warning.

I was planning on siting a separate alarm at a more sensible location near the true 'lowest point' but I'll prioritise this.  I might experiment next week with a deliberate fresh water flood to see for myself the rate that the pump can actually handle; the bilges need cleaning anyway.  For severe flooding I'd always planned to use a line from the engine intake as an emergency pump, the same line that I already keep to route to another hull valve in case of SD inlet blockage.  Of course, this relies on the engine being available with sufficient water volume and these posts have made me think again about the adequacy of my arrangements - in the safety of an alongside berth.         

Many thanks again to John and Mike.

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Ratbasher Members Profile Send Private Message Find Members Posts Add to Buddy List Captain Joined: 31 May 2017 Location: UK Status: Offline Points: 328	Post Options Post Reply Quote Ratbasher Report Post Thanks(0) Quote Reply Posted: 25 March 2019 at 14:53
	Some salutary lessons from Saba and Lukemi. In both cases the standard bilge pump seems to have been as much use a motorbike's ashtray and I know from my own (comparatively minor) flood that the pump is sited quite high above the lowest point on a 400, thus delaying any warning. I was planning on siting a separate alarm at a more sensible location near the true 'lowest point' but I'll prioritise this. I might experiment next week with a deliberate fresh water flood to see for myself the rate that the pump can actually handle; the bilges need cleaning anyway. For severe flooding I'd always planned to use a line from the engine intake as an emergency pump, the same line that I already keep to route to another hull valve in case of SD inlet blockage. Of course, this relies on the engine being available with sufficient water volume and these posts have made me think again about the adequacy of my arrangements - in the safety of an alongside berth. Many thanks again to John and Mike.
	H400 (2008) now with a detachable keel as the refit drags on....and on. Gosport UK 2022/23

silversailor Members Profile Send Private Message Find Members Posts Add to Buddy List Admiral Joined: 25 May 2005 Location: South Haven, MI Status: Offline Points: 1021	Post Options Post Reply Quote silversailor Report Post Thanks(1) Quote Reply Posted: 26 March 2019 at 01:43
	I had a "water intrusion" experience soon a year or two after delivery. It was apparent that the provided bilge pump is seriously inadequate. I'm not sure that any production sailboat has a sufficiently adequate pump. In any event I added an additional, considerably larger pump system and a centrifical pump with a hose that can reach anyplace in the boat. Overkill? Maybe. But, it made me feel safer. And, I've never had to use either one in the 12 years since installation.
	Silversailor South Haven, MI USA S/V Legacy 2010 Andrews 28



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