Monterey Greywater Group/Guild
Branched Drain Graywater system , drain waste plumbing
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Typical drain waste plumbing for a shower in a 20 year old home. Fragile copper feed lines to close for comfort, but luckily three's lots of vertical room, to make access easier.
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This view shows the p trap coming down from the shower, that tee's into the vent , before entering the waste line that takes it to the larger blackwater line from the toilet.
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This configurition isn't the design greywater calls for. Our p trap needs to be much higher, so we can install the three way valve above the exit to sewer line. So were cutting out the p trap, thevent connection. and the old cleanout..
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Maintaining the height of your valve installation is the real challange to greywater plumbing. This is because its all a gravity driven system. All drain waste is, but greywater plumbing has to exit above the foundation rather than below it.
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Cutting the vent line. Make sure its secured. Lots of shlocky work done in the good old days.
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First we raise the p trap a high as possible crossing over to the vent line above the copper, istead of 2 1/2 ft below\ it.
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This is the Jandy diverter valve. Its found in spa supply outlets and can be hooked up to an atenuator so it can be run electronicly.
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The irrigation greywater will exit the side, and the lower line feeds to the sewer. Input from the shower is on top.
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The new cleanout and waste line was left over long so it could be cut to meet the valve install.
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Here we change the orientation of the valve to send the water the way we want it to go.
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But first we need to know what our height is exactly so we can control our fall towards the landscape.
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Or course your connectations have to be right and tight with no burrs to catch hair. or cavities for greywater soap to collect in.
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