Making Water in Harbor?

[Tellie]

Originally Posted by waterman46

In theory an organic molecule, which is very large compared to salt, will not pass through an RO filter.

Forget the specs on filters for a moment. Would anyone admit that an aging filter can have a few holes that could be larger than the spec or the filter housing could leak raw water into the product water, bypassing the filter itself? In either case, you might get TDS readings in spec but still have some much larger organic molecules that made it through the leakage points.
This is only a hypothesis. Perhaps I am wrong, and that any leakage of raw water around the filter large enough to be a health threat would give unacceptably high TDS readings.

BTW I have a Spectra watermaker, and the first filter housing they supplied back in 1999 had a single O ring at each end to separate very high pressure raw water from the product water. Replaced this one a few years ago due to cracks in the metal around the high pressure ports, and the new design has two O rings at each end (could be wrong, this is what I recall). Maybe someone discovered a need for the second O ring.

Actually it's the exact opposite. The older end caps had the two O-rings. The newer end caps have only one.

[Tellie]

Offshore pieces of equipment, or Mrs. T and I get to go to another expensive Hawaii vacation again this year.

[captlloyd]

Originally Posted by LittleWing77

Okay, everybody, just back off on boat_alexandra.

For those of you who don't know him, he is a circumnavigator and a VERY strong proponent for the environment and environmental sustainability.

He sails on a boat with no engine and uses a sculling oar for close-quarters manoeuvring.

He provides a valuable perspective on this Forum and for those who wonder if it could be done? - He's done it.

A little respect, please!
LittleWing77

“ so you freely admit you discharge oil” . I call that comment both disrespectful and delusional. There has to be hundreds of thousands of boats worldwide that discharge some amount of oil, mainly through the exhaust. Let’s try to keep it real.

[Paul_Carroll]

Man has a point... exhaust almost always does have some amount of oil that gets to the water. Anyone who has worked on their water-lift exhaust system has probably noticed this residue.
That said, we all should be trying to do all we can to NOT let any oil that we can possibly avoid make it to the water.

[captlloyd]

Originally Posted by Paul_Carroll

Man has a point... exhaust almost always does have some amount of oil that gets to the water. Anyone who has worked on their water-lift exhaust system has probably noticed this residue.
That said, we all should be trying to do all we can to NOT let any oil that we can possibly avoid make it to the water.

Absolutely !!