How to Install a Graywater Irrigation System | This Old House

This Old House plumbing and heating expert Richard Trethewey shows how to reuse laundry wastewater. (See below for tools and a shopping list.)
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Tools for How to Install a Graywater Irrigation System:
– pliers
– drill/driver
– nut driver
– 1-inch-diamond hole saw
– PVC tubing cutter

Shopping list for How to Install a Graywater Irrigation System:
– three-way diverting valve
– 1-inch-diameter PVC pipe and assorted fittings
– teflon tape
– PVC primer and cement
– bark mulch
– plastic flowerpot

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How to Install a Graywater Irrigation System | This Old House
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Comment (0)

  1. I’m watching from Australia- it’s a place that needs this type of innovation so much. The presenter is very knowledgeable and easy to follow. Well done and well done to the city that has helped foster this initiative.

  2. Two additional thoughts. It helps to seal the hole surrounding the new pipe heading outside with caulking or a boot. Secondly, PVC pipes are not UV rated, meaning that when installed outside exposed to the sun, PVC will become brittle over time and may crack. This is easily solved by covering it with a coat of paint, which helps hide it as well if the color matches the house.

  3. At the end he was going to suggest using a flow valve to even out the discharge of the greywater to get even distribution of the water.. sigh… I wish he had taken the time to explain this so we got the whole picture..

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