Friday, November 13, 2009

Graywater System

The next step to habitation after I built the yurt was the graywater system. I needed drainage from my shower, the bathroom sink, and the kitchen sink. The toilet is a dry system, so no drainage necessary there. Looking around at the different options for graywater, I realized that most are designed for the typical four person household output of 50-75 gallons(190-280 L) a day. My output is drastically lower: somewhere around 15 gallons(57 L) a day. So I'm yet again stuck designing a system from scratch. Here's what I came up with:

First, you dig a hole.

Cut a 50 gallon drum in half and drill holes in the bottom.

Put the barrel in the hole, layer with large rocks, small rocks, pebbles, and sand to create a filter. Put the top back on the barrel.

Dig your trenches. In order to drain properly, the slope needs to be 1/4 inch to the foot. Yes, that's a microwave in the picture; and no, I have no idea why.

Here's the barrel buried and ready to be plumbed.

That's 2" ABS pipe.

I put a p-trap outside in case I lose anything important down the drain. Don't want to be digging that barrel back up if I don't have to. Insulated the access box with hay so it doesn't freeze.

Here's the pipe inside buried. From left to right, we have bathroom sink, kitchen sink, and the bottom is the shower flange.

This system should be able to handle all my drainage needs. I'll take care not to wash too many food particles down the kitchen drain so as not to clog up the system. I will also be using biodegradable soaps whenever possible.

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