Through Hull Sense Check

[lustyd]

Need to replace all through hulls and trying to measure up while still in the water which is a challenge as I don't trust the current cocks enough to pull hoses but at the same time I need to buy before lift out as we'll only be out a couple of weeks and these aren't stocked in huge numbers.

I have the following list:

• Toilet out - 1 1/2
• Toilet in - 3/4"
• Shower out - 3/4"
• Heads sink - 1"
• front cabin sink 1"
• Engine intake 1"
• Galley sink - pipe seems to be 1 1/4" but cock 1 1/2"

Do the above sound reasonable and normal? It's a typical Jeanneau Sun Odyssey 36.2 and I think through hulls are original

I don't need a discussion on seacocks or materials, just wanting to sense check the sizes before blowing £1000 on parts etc. prior to lift out.

Thanks all!

 

[RJJ]

That is exactly what we had on Dufour (2006).

 

[Tranona]

As I understand it Jeanneau do not always use the correct size valves for the hose size. So you may find your 1 1/2" toilet outlet goes through a 1 1/4" valve for example. This has come up before when I have suggested all toilet outlets are 1 1/2" and been corrected by Jeanneau owners. The apparent mismatch on the galley sink seems to suggest unwise to buy them until you actually have them out of the boat to check.

 

[jwilson]

On my Sun Odyssey 35 the galley sink is definitely not 1.5"; it's smaller, probably 1". Not on boat at present so cannot check.

 

[Plum]

As I understand it Jeanneau do not always use the correct size valves for the hose size. So you may find your 1 1/2" toilet outlet goes through a 1 1/4" valve for example. This has come up before when I have suggested all toilet outlets are 1 1/2" and been corrected by Jeanneau owners. The apparent mismatch on the galley sink seems to suggest unwise to buy them until you actually have them out of the boat to check.

Same for Beneteau toilet outlet, in my experience, 1 1/2 inch hose. The hose tail on the Jabsco heads has a 1 1/4 inch bore so I guess they decided if it came out of there it can pass through a skin fitting of the same bore. Works perfectly well in practice!

Www.solocoastalsailing.co.uk

 

[lustyd]

Thanks all, sounds like I'm close enough. I realised if the thread in the galley is 1 1/2 it must be a 1 1/4 too, logically. If there's one wrong I don' t mind returning and swapping or driving around the place to find one, I just didn't want to get to the point where it was all apart and nowhere had them in stock. Also didn't want to leave the chandler without stock, seemed nicer to pre-order

 

[superheat6k]

If this were me doing this job I would be using Forespar Marelon, which eliminates future electrolytic problems. ASAP can supply the entire range.

 

[Tranona]

If this were me doing this job I would be using Forespar Marelon, which eliminates future electrolytic problems. ASAP can supply the entire range.

There are no electrolytic problems with DZR, but if you are still scared then TruDesign non metallic are an (almost) direct replacement for metal fittings. Forespar are not a direct replacement as they are physically very much larger and substantially more expensive. Rarely seen here for those reasons.

 

[lustyd]

Slight update to this thread in case anyone finds it in future searches. I measured the wrong end (aka seacocks!). As it turns out, all my measurements were correct in so much as I now have the same through hull and seacock sizes. The bad news is that both basins needed new plugs which only come in 3/4" fittings not the 1" specified by jeanneau. The engine seacock was 1" but reduced to 3/4" for the strainer fitting, so could easily have been 3/4".
Changing size would have meant some GRP work, but also fewer bits and bobs adapting inside the boat.

Fitting the TruDesign was easier than expected, the Sikaflex acts as a lube so even once tight I could use the seacock to turn the handle to the right angle. This was very useful since the load bearing collars completely block access to the nut once fitted!