Comments on: Plumbing Manifolds – The Best Way http://setsail.com/plumbing-manifolds-the-best-way/ A New Paradigm for Cruising Sat, 11 Feb 2012 12:58:16 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: Steve Dashew http://setsail.com/plumbing-manifolds-the-best-way/comment-page-1/#comment-2626 Steve Dashew Tue, 20 Oct 2009 18:44:13 +0000 http://setsail.com/?p=8686#comment-2626 Good Question Ben: The manifolds in question are under the steering system support platform and so not subject to being stepped on.They are attached to long welded pipes, which run under the swim platform and exhaust aft above the waterline. The forward end of these pipes are supported by welded braces. Good Question Ben:
The manifolds in question are under the steering system support platform and so not subject to being stepped on.They are attached to long welded pipes, which run under the swim platform and exhaust aft above the waterline. The forward end of these pipes are supported by welded braces.

]]> By: Ben Garvey http://setsail.com/plumbing-manifolds-the-best-way/comment-page-1/#comment-2609 Ben Garvey Tue, 20 Oct 2009 01:37:08 +0000 http://setsail.com/?p=8686#comment-2609 Hi Steve - Ben from NS here. Been following avidly, and the boats are looking good of course. I like the look of these manifolds- it's a pesky problem that they solve - but a question for you: They are quite long and stick out quite far when built this way. That's a long lever for an overhung load if one were to (*ahem* this never happens) step on them or bang them with a falling piece of gear (or foul one of the attached hoses and pull on it heavily). Looks to me like the PVC valve casing is the weak point in this case - it would likely be the failure point if overloaded in this way. I know there are regs for minimum allowable loads on overhung thru hulls below the waterline, but I'm not sure if they apply above the waterline or not. Either way, it would likely be easily avoided by having an outer support leg or bracket that was welded to the aluminum manifold pipe, supporting the outer end of it back down to a hull plate or frame/bracket. I'm sure you've considered this already - any comment on this loading scenario? thanks - I enjoy following your travels as always. bg Hi Steve – Ben from NS here. Been following avidly, and the boats are looking good of course. I like the look of these manifolds- it’s a pesky problem that they solve – but a question for you: They are quite long and stick out quite far when built this way. That’s a long lever for an overhung load if one were to (*ahem* this never happens) step on them or bang them with a falling piece of gear (or foul one of the attached hoses and pull on it heavily). Looks to me like the PVC valve casing is the weak point in this case – it would likely be the failure point if overloaded in this way. I know there are regs for minimum allowable loads on overhung thru hulls below the waterline, but I’m not sure if they apply above the waterline or not. Either way, it would likely be easily avoided by having an outer support leg or bracket that was welded to the aluminum manifold pipe, supporting the outer end of it back down to a hull plate or frame/bracket. I’m sure you’ve considered this already – any comment on this loading scenario?

thanks – I enjoy following your travels as always.

bg

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