So I know it's been quite a while since I updated here. We've been crazy busy trying to finalize wedding and honeymoon plans, planning, preparing for, and embarking upon a Canadian overland trip, camping in the states, too, visiting friends and family, and general summertime craziness. Additionally, we kind of hit a phase where we were out of parts to assemble, and had to spend a deal of time planning before we could do much of anything that resembled work.
HOWEVER! We haven't given up! We just didn't have anything to show for quite a while. But now we've completed the water plumbing system. So let me show you it. But before I do that, let me explain a little bit. So you're not just like, why didn't they just slap a pump and some hose in there and call it good? We could have done that, been done a long time ago, and been onto other things by now. I think I touched on this earlier, but in case I didn't and for those of you just joining us, I'll give some background. We fully intend to bring this trailer to South America with us. We are trying to plan for the worst, and that includes no access to potable water. So we worked with a close friend who specializes in industrial filtration, and devised a setup that would allow us to filter ground water into drinking water. We will, of course, carry backup methods, like purification tablets, but we didn't want to have to rely on them, or any one method. You all know the importance of redundancies. So that was one major design consideration. The second was that I'm lazy. I don't want to have to pour 20 gallons of water into this thing every time it's empty. Do you know how heavy that would be? F that. This laziness also meant I was really dragging my feet on installing two pumps to make this work the way I wanted it to. Or maybe that was cheapness? I dunno. ANYWAY. Here's what we did, and it works fantastic!
I'll show you how it works, and you'll get the gist of how it all goes together, I think. And why it is the way that it is. So let's say we're empty, right? And we're in the boonies, and we find a small stream. Okay, so we take out our collapsible hose, and one filter.
And then we hook the hose up to the trailer, and put the filter onto the hose. Keep in mind this is just a coarse sediment filter.
Then with the valves in "suction" mode, we flip the pump switch on, and run it til the tank is full. Then, flip the switch off. What happens while the pump is sucking water up? Glad you asked! The water comes into the trailer's plumbing department and is then sent through a fine charcoal filter. (For now, we're using a 2 micron filter because potable water is easy to find. When we're ready to go more remote, we need to find an even finer filter. I believe the figure was .2 micron. Luckily the cartridge sizes are standardized.) So, then the water goes through a 3-way valve, to the pump. From the pump, it is pushed through another 3-way valve, and then directed into the top hole of the water tank. So what does all that look like? In a word; blue spaghetti.
Note that it's ugly AND it's hard to photograph. Most of these are from the ground, looking straight up. I'm sorry.
After the tank is full and we've disconnected and stowed the hose and coarse filter, we switch the 3-way valves to "normal" operation mode, and turn the pump back on. In normal operation mode, the water takes a different course. It "starts" its journey at the bottom outlet of the water tank, where it is directed through the first 3-way valve to the pump. The pump, again, pushes the water to the second 3-way valve, which now sends it out to the points of use; the sink and the water heater.
So, it's ugly, yeah, but it works beautifully. I initially used some FPTxPEX elbows that have a swivel built in, and a hand-knob on the FPT side. DO NOT BUY THESE. I had to throw away almost all of them because they refused to stop leaking. I tried snugging them, torquing them, lubing the seals, tightening, loosening, tightening until they broke. They wouldn't not leak. And they leak from the inside. It's impossible to describe clearly, but take my word for it. Or read hundreds of terrible reviews online that I didn't read until it was too late. -__- I reworked the design a little to use FPTxPEX non-swivels that are a bigger overall fitting, but they work perfectly.
Because there was so much leaking on the initial setup with the crappy elbows, I was having problems making it all work. I was so distraught because I'd put so much effort into the design concept, and I thought I was going to have to scrap it all and do two pumps or something. Further, the pump wouldn't build pressure in the system until it ran for like 2-3 mins with the sink off. I was beyond stoked when I swapped out the elbows and it worked flawlessly. Let me just reiterate, do not buy Pex swivel elbows.