Salt water deck wash suction hole
Submitted by Dbf09 on Wed, 2020-02-12 06:35
Morning team,
I am going to install a saltwater deck wash in on my fibreglass boat but being that I have only owned plate boats, should I stay clear of having my hole for my auction drilled through my transom or doesn't really matter if I seal it well with sikaflex/marine sealant ?
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North Coast Marine
Posts: 74
Date Joined: 23/05/16
Use a scoop/skin fitting
Use a scoop/skin fitting through the hull/bilge area
Jackfrost80
Posts: 8144
Date Joined: 07/05/12
^ Jonny did mine and I'm glad
^ Jonny did mine and I'm glad I went down that line but we only just got it all in by a bee's dick
Officially off the Pies bandwagon
pelagicyachts
Posts: 1322
Date Joined: 23/02/11
do not use sika to seal into
do not use sika to seal into plywood (transom) it will let water in over time - the proper way to do it is drill oversize holes and then tap a thread in - bit of effort but will save your transom from rotting over time
carnarvonite
Posts: 8669
Date Joined: 24/07/07
Transom
Not much sense in putting it through the transom as when you are up and planing there will be nearly no water entering the hole.
Better to fit a scoop
Dbf09
Posts: 8
Date Joined: 31/01/20
Thanks guys
Thanks guys
Dbf09
Posts: 8
Date Joined: 31/01/20
So drill through the hull
So drill through the hull and fit the scoop? Or can this piece be placed through the transom? What wpuld
you recommend to seal it when fitted
Paul N
Posts: 485
Date Joined: 09/11/06
fix it to your trim tab
I hade the same problem as to where to put a pick up . ended up bolting on a small tube to one of my trim tabs . hose attached to tube and over the transom . Been there for about 6 years and works fantastic
ranmar850
Posts: 2702
Date Joined: 12/08/12
If you want to do it properly, don't use the transom
You need a fitting down through the hull, not through the transom. Look over the back when you are planing--the transom is out of the water. As for the type that relies on water being forced up by a pickup tube bolted to the the transom facing forward--these only work when you are travelling fast, and not very well at that. A fitting through the hull, with a scoop facing forward, will work 100% of the time. And you are putting a hole through solid glass ( assuming you don't have a "cored": hull, not much of that rubbish in Australia) Just drill the hole slightly oversize and seal the cut edges with epoxy and let it set before fitting the through hull, with a ball valve on top, and sikaflex. Make sure it has a strainer/scoop facing forward, or it won't work very well at speed. And don't get the cheapest pump--the smaller ones are usually rated at 11 or 12 l/min. I can just about piss that fast. Get a 20l/min job, much, much better.
scubafish
Posts: 962
Date Joined: 15/08/12
Try
https://www.whitworths.com.au/pumps-plumbing/plumbing-accessories?
http://img.gg/BQ91Sys
Silver Fox
Posts: 1111
Date Joined: 19/06/14
Make sure it’s bronze below the waterline.
Go through your hull and use a bronze ( even better still brass ) fitting. Make sure you put a check valve on the fitting . If you want to be super anal, add a wooden cone dowel attached to your through hull with some 10lb line . You ever f@#k a fitting and have a hole in your boat at least you've got a get home free card. I've got em in my tub and it give me peace of mind.
My wife understands why I clean my rods n reels in the shower....
Dbf09
Posts: 8
Date Joined: 31/01/20
Thanks for all the advice
Thanks for all the advice guys. I'll have a crack this weekend
Subaquatic
Posts: 514
Date Joined: 23/04/11
External for me
http://fishwrecked.com/image/deckwash-scoop
Dbf09
Posts: 8
Date Joined: 31/01/20
Looks good
Looks good