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Forum: Plumbing Systems and Fixtures 24-08-2022, 21:44
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

O rings are dirt cheap if bought at a bearing service stores and probably the most likely things to get damaged during assembly.
Forum: Plumbing Systems and Fixtures 23-08-2022, 15:51
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

The design by the OP is a brilliant piece of work and I tend to the opinion that one could not improve on it from a risk/reward viewpoint.

The big items are the pump, membrane and membrane...
Forum: Plumbing Systems and Fixtures 23-08-2022, 03:29
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

Not a bad strategy.

Sometimes you just have to make a start and cope as you encounter the problems thrown up. However, your thinking will benefit greatly from being to observe and ponder on the...
Forum: Plumbing Systems and Fixtures 22-03-2022, 22:13
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

It's more than enough if one shows a little discipline in fresh water use.
Forum: Plumbing Systems and Fixtures 27-02-2022, 16:20
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

That's an indication that the cylinders were not filled with fluid when the plunger changed direction. You might even be able to make it quieter with a pulsation damper on the pump suction as close...
Forum: Plumbing Systems and Fixtures 07-09-2021, 20:56
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

I'm a bit curious about the flow rate across the membrane shortening the life.

My understanding was that it was the velocity of the sea water side which was important and not the flow rate of...
Forum: Plumbing Systems and Fixtures 05-03-2021, 00:37
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

Great little pumps however they are only two cylinders which puts a lot of pressure pulses into the output. Gadgets called pulsation dampeners will quieten the noise created by the pulses but I doubt...
Forum: Plumbing Systems and Fixtures 12-02-2021, 19:37
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

How about an image or two. I have a 40E and have been thinking of doing the same thing. I get a severe case of wallet choke every time I look at the price of a replacement membrane from Katadyne.
Forum: Plumbing Systems and Fixtures 10-09-2020, 00:53
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

Yep, a technology which has been under utilized. I pondered making one of about 12 square metres fixed on either side of the boom to double as a deck shade.
Forum: Plumbing Systems and Fixtures 18-05-2020, 21:41
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

I tend to the opinion that RO gives the greatest scope for innovation, the high pressure pumping aspect being the most challenging.

Back in the days when I was still pondering on it I decided...
Forum: Plumbing Systems and Fixtures 18-05-2020, 18:25
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

I have a Powersurvivor and it not only makes the thump but the current draw fluctuates wildly as well. I suspect a pressure accumulator between the power recovery and pressure piston would make it...
Forum: Plumbing Systems and Fixtures 18-05-2020, 18:08
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

"Not everything is about money. I don't know if you've ever actually operated such a high pressure pump, but believe me, you'll be dying to turn it off after an hour or two. Running it all day -...
Forum: Plumbing Systems and Fixtures 18-05-2020, 14:10
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

Precisely the point I was attempting to make.

The combination of the Pazzazz watermaker and the panels to run it is far cheaper from a capital expenditure viewpoint than the Spectra whilst the...
Forum: Plumbing Systems and Fixtures 14-05-2020, 13:28
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

And all that is why I feel you have created a beautiful design.

Spectra have a pump with energy recovery at the cost of considerable complexity and the baggage which always accompanies it - not...
Forum: Plumbing Systems and Fixtures 13-05-2020, 22:55
Replies: 174
Views: 61,479
Posted By RaymondR
Re: Small watermaker 3 gph

That is a beautiful design Pizzazz.
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