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It took a while to find the right one. But, I finally got a pump and strainer ordered, and paid for.
I ordered a 12vdc, 3.0 GPM (11 LPM) ShurFlo Revolution (Model 4008), 55 PSI pump.
To protect it from any any trash entering the pump head, I added a ShurFlo threaded strainer to the order. (Both were listed on eBay.)
They should be shipped early this week. After getting prices that just made me laugh at other sellers, I finally found one who was down to earth, and not trying to get my first born as part of the deal. I found Circle K RV's, a seller on eBay.com. They also have a website. Circle K RVs offer quite a number of parts and accessories for RVs. They also have no issues with shipping anywhere in the world. (Some companies I have dealt with during this search, seemed a bit more apprehensive to ship to Cambodia. Oh well, their loss.)
Anyway, after communicating with Circle K, they were willing to combine both orders into one, thereby saving me a bit on shipping.
So, now I am just waiting. As soon as they arrive, I will pipe both parts into the water system at the farm.
Well, it took a while to find one. In fact, we ended up having to order it from Phnom Penh. Probably even paid too much for it ($130 USD, all in). But, we got it, and it is for the whole house. Oh, it comes with a beefy bracket, too, and the mounting screws with washers (4), to mount it to the bracket.
Put the tape measure on it. The filter is a standard 20" X 4.5" charcoal filter. Replacement cost, by the way, he told me is $60 each.
Part of a previous project I wanted to work on in Battambang, was to initially get a fairly constant (clean) water supply to the house. Ultimately, I want to drill a well. However, I wanted to do whatever it took to get the home in order so that it was "barang" livable, first. So, my priorities, in order of importance, were -
1. Constant source of power - solar array. 2. Semi-constant source of water - rain water collection / harvesting. 3. Western toilet installed on grounds. 4. Pressurized water system, including DC pump, storage tank(s), and possibly a well. 5. Possible solar water heating project. 6. Anything else that I would need as a creature comfort.
Since item number one was covered here, and will be completed by this up coming Tuesday, I figured why not go ahead and start on item number two, which will begin tomorrow. No better time than the present, I say.
Currently, there are three of the Cambodian style water storage "jars" on the property. They provide a total volume of 3,150 liters, currently. Obviously, I will need much more. However, considering I will cover a well in item number four, above, I shouldn't need to depend on the 3,150 liters for too long.
At the moment, I have 55 m2 of roof area, from which to collect water. I realize this doesn't sound like much. But, considering the volume of water that is dumped during these monsoon rains, and after having watched the water fill some of the smaller tanks simply from the water falling from the sky, I figure the roof will make short time of filling three - one thousand liter tanks. Some how, I just do not see Cambodia following along in the "typical" parameters that would apply to most mathematics calculations. In fact, according to the calculation to determine how much water you can harvest from a given roof area, the roof in question should only be able to provide a bit over 3,000 liters, over the course of an entire year!
Let me tell you, folks, I found that quite laughable, to be completely honest. It was so funny, and so "out there", that I actually calculated the variable three times! Each time, it came up the same, exact figure.
Anyway, tomorrow, the concrete pad for the tanks will be formed, poured, and will hopefully cure before the afternoon rains set in. Then, the gutters will go on the house, the PVC will be routed from the downspouts, and the tanks will be set in place and linked together via a 1/2" PVC pipe and a few other fittings. Considering we should still get a fair amount of rain through October, this should be a decent time to set in to test this new project out.
Breakdown for labor and material costs:
$49 USD - labor rate for one installer (boss) and three laborers. *Salary breakdown: $17 (journeyman), $7 (laborer), $10 (laborer), $15 (laborer) $57 USD - PVC, rain gutters, and all accessories necessary for assembly. $40 USD - big rocks for filler as sub foundation for concrete slab. $15 USD - small rocks for filler as sub foundation for concrete slab. $25 USD - sand to mix with cement. (We only used about 3/5ths of the sand for the project.) $33 USD - cement for foundation. $04 USD - We had to purchase 3 more 90 degree 2 1/2" elbows due to an - oooppps! $223 USD - TOTAL
* The reason for the salary differences is because the laborers were there before the actual construction, moving the sand, rock, and cement to the work site.
Please understand that, had I just made a simple harvesting system, I could have done so MUCH cheaper. However, I am using a design of a "First Flush System", similar to one made by a guy on YouTube, to prevent the initial water from the roof to be sent to the tanks. This alone, added significant cost to the over all collection system. But, it also guarantees cleaner water will be delivered to the storage tanks.
UPDATE 22-12-13: Since this thread was started, we have added another 30m2 of rain water catchment area to the farm house. Also, the original figure of 20m2 was incorrect. It was 25m2.
UPDATE 18-01-14: The added roof, with steel supports and trusses, cost $13 / m2. The total cost was included in a $1,000 USD extension project. But, comes to $390 USD, total. Additionally, we finally got around to finishing connecting the added roof collection area to the rainwater harvesting system. We bought two additional lengths of 2.5" PVC. However, we only needed length for the job. The cost for each length was $4.00 USD.