bph2treat
29.05.2021 20:55:54
If I do not find anything I will machine one and have it welded in. here
See full version: Thru hull fittings for aluminum boats
If I do not find anything I will machine one and have it welded in. here
When I had my boat built I insisted on not having any plastic thru hull fittings below the water line. They made a tube that doubles as a handle off the transom that picks up water for my washdown. I have a livewell that recirculates the water in my rear transom well. The rear transome well is split in 2 parts with a plug between the wall in order to flood the livewell you turn on the valve and fill one tank that spills into the other or just run a hose to the bait bin from the washdown. The livewell then has it's own pump that will then recirculate the water in that tank. Are you confused yet.
I would like my livewell to have it's own pickup so it does not rely on the washdown system for water. I also do not want any plastic thru hull fittings below water line. I once saw a picture on here of a fitting made from aluminum that I believe Pacific boats uses for this it was a high speed pickup made from aluminum. I have searched and cannot find the picture do any of you have this fitting or a picture and do you have any feedback on this fitting?
One of the issues I have is with the tube I believe the pump has to lift the water further than it was designed to do resulting from poor pressure at the hose. What I originally wanted done was to have the tube go inside the bilge just high enough to be above the water line so that any hose failure would not reult in flooding the boat. When they suggested running it up like a handle I thought it was a good idea forgetting the basics of how pumps work and this type pump is not designed to pick water up from 3' so I am sure that is why I have low pressure. I am now trying to figure out how to make it better. I do not fault the builder as they did what I asked I just need to figure out how to improve it.
The washdown hose is also split so I have a hose in the front of the cockpit by my rear steering helm and a spigot inside the rear fish well. I am sure this extra length of hose does not help the issue either.
Wholesale Marine carries thru hull fittings and strainers by Attwood, Garmin, >Groco, Johnson Pump, Shurflo, T&H Marine, and Whale Marine. For years of efficient service, we recommend Groco’s Tri-Flanged Ball-Type Seacock. It features a patented field reversible handle with a choice of closed position options, and will accept standard ratchets. here
Scoop strainers are designed to prevent debris from entering and clogging your cooling system, while marine thru hull fittings connect plumbing or fuel hoses from the interior to the exterior. These may not be expensive boat parts, but they are very important. That’s because thru hull fittings/strainers ensure that water does not breach your boat’s infrastructure. Many a craft has been scuttled for lack of a water-tight fitting, so be sure to maintain your boat’s fittings and strainers with reliable replacement parts from Wholesale Marine.
T&H Marine’s Inline Check Valve is available in three sizes to accommodate the most common standard cockpit and hull exterior fittings. This inline scupper was designed for use above the waterline, while Attwood’s Stainless Steel Straight Barbed Thru-Hull Fitting is also available in three sizes, and designed for a long service life!
For ball-valve type seacocks, whether Marelon or metal, with the boat on the hard, remove the hose attached to the valve and get a paint brush that will fit into the valve. Using the same waterproof grease just mentioned, load up the paint brush with the grease and insert it into the valve pushing down onto the valve ball. Work the handle back and forth so that the surfaces of the ball get coated with the grease.
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Additionally, I’ve been involved in several cases where the actual metal alloy used in making the valves and fittings was determined to be sub-par, and accelerated corrosion was the net result. One manufacturer was involved in a major recall of their seacocks a few years back. The truth is, most of this cast metal is made in Asia, and there are plenty of instances where cast metal in particular is simply not what we expect of it.
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Through-hull fittings like sink drains and seacocks fall into a group of components that can make the difference between floating your boat and getting that sinking feeling. The design, material selection, and installation of this equipment is of paramount importance. Furthermore, installation methods can make a big difference in things like the integrity of your boat bottom’s fiberglass laminate. So, with these thoughts in mind, let’s get down to the details for making the holes in your boat’s bottom, and those near the waterline safe and secure.
There have been reports of Marelon valves sticking and people forcing the handles so hard that they broke. Well, whether a seacock valve is bronze or Marelon, maintenance is still required. Periodic lubrication will eliminate the sticky valve problem. Some say it should be done every six months. I’ve found that once a season works well for me in the Northeastern US. more
For the old-style tapered bronze valves, it's a good idea to disassemble the units when the boat gets hauled and perform a thorough cleaning and lube with a high-quality waterproof grease like Corrosion Block, typically used for boat trailer wheel bearings. Lewmar winch grease also works fine. These old-style seacocks are great in that they can be completely disassembled for a truly thorough cleaning. But if you ignore maintenance, especially in salt water, you might have to use a three-pound sledge (as I have) to get the handles to move. With that kind of force any valve handle, whether bronze or Marelon, is liable to break. more
A particularly important part of annual maintenance is inspecting your boat thru hull fittings. Improperly maintained marine thru hull fittings are a number one cause of sinking – so inspect them annually for any deterioration. Additionally, keep hoses from clogging by adding a scoop strainer on deck and marine intake strainers inline before water pumps. Fisheries Supply is your premier supplier of boat intake and thru hull strainers from the top brands – so shop now and save or browse our wide selection of seacock valves. here