New 12V71ti Raw Water Fittings

[scottinsydney]

So the boat is being slipped in June for anifouling, out of water insurance inspection and to replace the final lot of thru hull fittings. Only taken me 10 years.




So out with the old valves and Perko strainers. We are going to use the Groco Buck Algonquin seaside strainers with #2 mesh. These also have a removable grate and opening door. We have spares of the grate so we can do quick swaps. Speaking with the Groco tech, customs have found the #2 grate size perfect for engine intakes.

The 3" engine water intake fittings have arrived. They are massive. The fittings are Tru Design composite parts made in New Zealand. The valves are billed as "never seize" unlike the monstrous Perko valves which have locked open and are burried below those massive Perko strainers.

One of our suppliers made up a customer bendy hose to go from the 3" thru hull fitting to the 2.75" jabsco pump hosetail. We had been trialing a similar hose between the Jabsco pump and the intercoolers for the past couple of years. The beauty of these hoses is that you do not need reducers in the line. 2.75" hose tail size is uncommon. Hopefully we have measured the required length of the new bendy hose accurately.

 

[rustybucket]

I'm kinda surprised insurance would be ok with those thru hull fittings and valves vs a seacock?

 

[scottinsydney]

Valves are sea cocks.

www.trudesign.co.nz

 

[Boatsb]

All seacocks are valves. Not all valves are seacocks

 

[Captain Ralph]

I'm still confused about that 2 3/4" raw pump inlet.
Mine and others I work on are 3".
Is this a down under thing? Something custom?

 

[drewread]

I'm still confused about that 2 3/4" raw pump inlet.
Mine and others I work on are 3".
Is this a down under thing? Something custom?

My 48 Yacht Fisherman has 2-3/4" inlet on the raw water pump.

 

[brettportzer]

Mine is 2-3/8..!

 

[scottinsydney]

We do not know what size the thru hulls are on our boat. But given the Jabsco pump inlet is 2.75" then the closest larger size of Tru Design skin fitting is 3". Hence the custom reducing hose from the sea cock's 3" hosetail to the 2.75" Jabsco pump.

Definitely not a down under thing. Boat is original. The boat lived its first 30 years in the USA (Ft Lauderdale, Galverston & Annapolis), Canada (Toronto & Chicago) and Bahamas. Its first owner took it all over the Caribbean and kindly put the cockpit extension on. The Jabsco pump inlet is definitely 2.75". I guess you could swap / have different hosetail sizes on the pump. 2.75' is a strange hose size and diificult to find. Hence the custom bendy hose.

Photos show lifting Ortessa aboard the transport ship in 2010 and headed for its first home in Melbourne Australia. Now lives in Sydney.

 

[rustybucket]

Valves are sea cocks.

www.trudesign.co.nz

From my understanding seacocks are bolted directly to the hull. The thru hull fitting could be sheared off and you would still have the seacock valve attached to the hull enabling you to shut it off. In your pics if the thru hull fitting sheared off it would just pop out inside the boat and there would be no way to stop 3"+/- of water flow.

 

[drewread]

From my understanding seacocks are bolted directly to the hull. The thru hull fitting could be sheared off and you would still have the seacock valve attached to the hull enabling you to shut it off. In your pics if the thru hull fitting sheared off it would just pop out inside the boat and there would be no way to stop 3"+/- of water flow.

They actually look to have some interesting products that are ABYC approved.

The Manual ball valve and load bearing collar look like the solution. I don't see that in OPS image, but maybe they are using them? The compact valve doesn't look to be ABYC approved.

 

[scottinsydney]

Apologies for my misuse of the term sea cock and / or valve or vice versa.

These Tru Design parts are used on commercial vessels and recreational boats in Oceana.

My business does sell these parts along with importing Groco and Perko so of great interest to me. American parts are 95% NPT. We mostly use BSP. Euro imports are using some metric fittings.

The smaller fittings can be fitted with a collar but apparently unnecessary on larger fittings due to their strength.

Not sure why Tru Design are not yet marketed in USA. Must be an opportunity for someone. Take a look at their website.

The reason we are changing is that the monstrous Perko seacock / valve set up has seized and we cannot get access below the strainer they installed.

 

[bostonhatteras]

The valves are billed as "never seize"

This is an interesting claim. I don't believe glass filled nylon is resistant to crustacean growth. If a vessel sits in the water with the seacocks closed, how does the ball surface exposed to seawater remain growth free? This can seize any valve given enough time. Speaking of sitting in the water with the valves closed, do the valves furnish a drain fitting?

 

[Captain Ralph]

This is an interesting claim. I don't believe glass filled nylon is resistant to crustacean growth. If a vessel sits in the water with the seacocks closed, how does the ball surface exposed to seawater remain growth free? This can seize any valve given enough time. Speaking of sitting in the water with the valves closed, do the valves furnish a drain fitting?

Forespar states the same with their marelon plastic cocks. If you read Forespar's fine print; when using their grease and operated frequently it helps understand the sales pitch.

Now if the valve is always open, nothing to foul or grow on a moving surface, they might close without a fuss.

One day, I wonder if frying pan Teflon will ever make it to underwater hardware.
Or some of that other frying pan non-stick as seen on TV.

 

[Hatty53]

Teflon is slicker than Owl S&^%!