Re: [Amel] Water Maker End Caps


Danny and Yvonne SIMMS
 

Hi,
We too had the end cap split there,  once. I think the size of the O ring used on the steel cross piece is critical, too large and it puts excessive pressure on the plastic. When ours failed I had forced a too large O ring in. The way an O ring works is that it should be a snug fit, not over tight. When the pressure comes on it is forced agaist the side of the groove away from the pressure, expands and seals, the more pressure the more force against the side of the groove, the more expansion. Obviously this won't work if it is too small.
Cheers
Danny 
SM 299 Ocean Pearl 
Still in Fiji


________________________________
From: Giovanni Testa <gtesta23@...>
To: amelyachtowners@...
Sent: Friday, 16 August 2013 12:23 PM
Subject: Re: [Amel] Water Maker End Caps


 

Hi to all,
I had to replace, in 10 years, twice the caps for this problem. At the end Dessalator sent me a new connection, some mm shorter . Now the water pressure doesn't find any obstacle to the flow and so no corrosion on the cap.
I hope it may help
Buon Vento
Gianni Testa
sv EUTIKIA SM 428
----- Original Message -----
From: Ian Shepherd
To: Amel Owners Group
Sent: Tuesday, August 13, 2013 6:45 AM
Subject: [Amel] Water Maker End Caps

For the third time now, one of the membrane end caps has sprung a leak
on my 160 l/h water maker. I only noticed this when hunting for some
grease to give to another boat as the far end of the membranes is close
to the portside hull. Some some storage boxes kept in that area were
full of salt water. As before, the leak has occurred where the steel
cross tube enters the end caps. This push fit arrangement seems at best
amateurish and Dessalator are well aware of the problem for when I
ordered new caps from them the last time, they said that the new black
material would not fail. Sadly not.

I think it's time to get something more robust made to cure this
problem.. End caps with proper screw fittings and a connecting hose or
pipe come to mind. Has anyone done this or maybe found ready made caps
that will do the job please?

Ian Shepherd SM 414 (2003) Crusader - Northern Sporades

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