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Search took 0.00 seconds. Search: Posts Made By: Pizzazz
Forum: Plumbing Systems and Fixtures 28-09-2022, 23:24
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

This is great performance. Based on the chart for 107SS, you should be drawing around 10A or less than 3AHr per gallon, which is fantastic. My only reason for recommending larger membranes is that...
Forum: Plumbing Systems and Fixtures 31-08-2022, 02:59
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

Once you start reducing flow through the membrane, the efficiency goes up rapidly, the quality of the water deteriorates slowly and the life of the membrane shortens very gradually. You want to aim...
Forum: Plumbing Systems and Fixtures 12-06-2022, 08:50
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

There are many pressure washer pump designs, so don't expect much. It uses a K2 pump and a 2540 membrane, generator driven. The idea is to make all parts line replaceable units, so that the pump...
Forum: Plumbing Systems and Fixtures 03-04-2022, 16:15
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

The 116C Pumptec pump is stainless steel. I would think that an aluminum pump will not last long in a high pressure, salt water environment.

Regarding the use of the longer, -21" membrane, by all...
Forum: Plumbing Systems and Fixtures 18-06-2021, 08:07
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

Really looking forward to see what output you get. I have moved back to Europe and can no longer source pumps in the US, sorry everyone. A couple of things to try once you get it running... make sure...
Forum: Plumbing Systems and Fixtures 18-05-2020, 18:00
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

In designing an RO watermaker, we are bound by available membranes and the need to make 800+ psi pressure. The lowest output watermaker is the Powersurvivor 35 which makes 1.2 gph using around 4.5A...
Forum: Plumbing Systems and Fixtures 18-05-2020, 14:32
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

Raymond, thanks for the kind words, no need for exaggerating my role, I just happened upon a good misting pump. One clarification, though, it is a positive displacement pump, so it will keep adding...
Forum: Plumbing Systems and Fixtures 18-05-2020, 09:32
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

This is a very valid point. If you are cruising often, you either get a Spectra if running a DC boat or a high output AC watermaker if you have a generator. We settled this a while ago.

The...
Forum: Plumbing Systems and Fixtures 14-05-2020, 11:37
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

If you want to get even more technical about the design and why I think this Pumptec pump is amazing for our needs, read the following.

Let's say we had unlimited resources and wanted to design a...
Forum: Plumbing Systems and Fixtures 13-05-2020, 21:24
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

All membranes are more or less the same. In a small watermaker design you run the membrane at a much higher recovery rate than publishes. This reduces your power requirements, decreases the quality...
Forum: Plumbing Systems and Fixtures 22-03-2020, 17:00
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

The breakdown is shown above. The key components are pump motor combo for $320, housing for $240 and an RO membrane for $180. The rest is small parts including the needle valve. One improvement I...
Forum: Plumbing Systems and Fixtures 11-02-2020, 16:34
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

-116c-105 pumptec HP pump , $675 from pumptec direct or through a dealer
You can get a 50% discount = $340 if you register as a dealer (or through me)

-14" membrane housing $320 from...
Forum: Plumbing Systems and Fixtures 14-11-2019, 19:21
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

Regarding the 3 gph watermaker, the dimensions are determined by the pressure vessel, approx. 19” by 3”, the pump motor combo is attached to one end, adding around 10”. In addition, you need a 10”...
Forum: Plumbing Systems and Fixtures 27-10-2019, 08:37
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

Brian, aluminum pressure washer pumps do not work well with salt water. We have discussed this many times. Many people have experimented with these and they do work for a while but eventually they go...
Forum: Plumbing Systems and Fixtures 26-10-2019, 17:44
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

Just FYI, I had a much more complicated design with solenoid switches for water intake and cleaning, a voltage regulator (instead of a pressure regulator) and so on and in the end decided that the...
Forum: Plumbing Systems and Fixtures 26-10-2019, 14:44
Replies: 174
Views: 61,491
Posted By Pizzazz
Re: Small watermaker 3 gph

It depends on the membrane. It is suggested that the product to bribe ratio is 1:3 minimum (25% recovery but you can go to 30-35% recovery without losing too much ppm). Most small watermakers operate...
Forum: Plumbing Systems and Fixtures 24-10-2019, 11:25
Replies: 174
Views: 61,491
Posted By Pizzazz
Small watermaker 3 gph

I am sharing my 3 gph watermaker design for those who want to DIY. After many months of experimentation I settled on the following design:

Parts
- Pumptec 116C stainless steel pump/motor combo....
Showing results 1 to 17 of 17

 
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