Cabin water system: the big idea

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The first project combines relative ease of completion and maximum lifestyle improvement. I don’t mind hauling water but a supply of running water will later, on the addition of the photovoltaic system, facilitate the addition of running hot and cold water both to the sink and the outdoor shower.

A 275 gal. (1140 l.) IBC tote in palletized aluminum frame. 330 gal. (1249 l.) is another standard size.

Running hot water you say? At a remote cabin you say? That’s the plan. The reason I have to wait until I add solar power is the location of my water reservoir –a 275 gal. IBC tote used once to transport non-GMO organic fructose syrup to a cannabis edible manufacturer– in its preferred location will only generate 6.495 PSI. Manufacturer’s specs for most of the instant propane water heaters I’ve seen requires a minimum 20 PSI for safe operation. A 12v inline kicker pump –drawing electricity only when in operation– will solve my PSI problem without wrecking my battery levels.

There is really no levelling or prep required at the tank site. My landlord Alban’s aesthetic sense for the land insists that the tank be conclealed from view so once installed it will receive ‘the Treebeard Treatment’ (to wit, a layer of chicken wire with moss and ferns intertwined into it). I want to keep the water temperature as low as air temperatures will allow so I’ll probably overdo this step and use some opaque gardener’s plastic as an underlayment to the Treebearding, which will have the twin effect of obscuring any high-albedo bits of white plastic or aluminum that might otherwise give lie to my efforts at concealment.

water system flow chartOutflow adapters with valves are commercially available to replace the rudimentary valves included with IBC totes so to save time and guarantee durability I’ll invest in one of these new. These adapters are usually threaded for standard ¾” garden hose so I’ll purchase a lead-free adapter to fit the PEX I intend to use as my main outflow to the house and eventually to the 12v kicker pump once the solar power is in. I am considering purchasing a length of used, discarded fire hose to use as sheathing for the main PEX water line. I worry about rodents more than rot where PEX is concerned.

We’ll run the PEX up to the back of the house under a cover of soil and forest litter (there’s no digging through roots this heavy without power equipment) and split the cold water flow, capping one outflow for an eventual run to the instant propane water heater. The open end will divert cold water via smaller-gauge household PEX through existing wall cuts into the sink fixture (and eventually an outdoor shower fixture out back), leaving enough room for the eventual addition of the hot water tubing but secure from critters in the meantime. This will satisfy my main objective: adding running fresh water to the cabin. A little work aforethought will facilitate the later addition of hot water, and later a nice outdoor shower.

The previous tenants created an outdoor shower setup consisting of 6” PVC with the bottom end capped, then drilled and threaded for an on/off valve and shower head. It’s clunky, cumbersome, and ultimately unsatisfying to all purposes except fundamental cleanliness. The siting of the shower off of the back deck cluttered some of its usable surface and created perfect conditions for rot on the deck members below it. Neglect having been one of this cabin’s ‘problems’ on arrival, much of the work I’ve done since I moved in has been aimed at reversing as much of this neglect as possible. Hanging the future outdoor shower below the edge of the deck will allow me to keep the deck surface clear and mitigate potential causes of rot.f6f3e4b8c802f5eea37e0b409427d018-outside-showers-outdoor-showers

There’s nothing but bare soil around the cabin so the drainage for the outdoor shower will occur through the proverbial box of rocks: a likely collection of round, flat stones from the local beach and stream contained and isolated from the mud by a wood box, probably 2’x2’ in size: smaller than that pictured at right but not by much.


  • If you’re going to Craigslist to look for a used IBC tote (which I heartily recommend) make absolutely certain the container was used for food-grade contents only. These totes are also sometimes used to deliver chemicals, pesticides, and solvents that should permanently disqualify them for water storage purposes. They can’t be cleaned. Choose food-grade containers only.
  • Consider whether any/all of the materials you intend to use are intended for use with potable water. Are your fittings lead-free? Is the piping you intend to use susceptible to mold or rot?
  • Freezing is seldom a problem for us this close to the sea and sea level but depending on where you are you’d likely be well-advised to factor freeze resistance into your strategy to a greater extent than I have here.