Step 10

Get out your pump and screw on the 1/2" threaded PVC adapter (C) and one 1/2" PVC threaded coupler (B).

Now lay the pump down on the bottom of the chamber with the outlet facing up d towards the "T" fitting and measure out a length of pipe (D), to connect them. You want the pipe to be long enough to fit snugly and maintain proper alignment.

Now you may remove the pump and vertical pipe and drill a pressure relief valve into the fitting as shown in the picture above (A). The hole should be drilled through only one side of the fitting and pipe with a 3/8" drill. The purpose of this hole is to allow excess pump pressure to bleed off inside the chamber, causing a gentle circulation inside the reservoir. By keeping this joint free from glue, you can rotate the pipe inside the fitting to vary the amount of relief (pic. B shows a 50% setting.)

Growing Soilless

Growing Soilless

This is an easy-to-follow, step-by-step guide to growing organic, healthy vegetable, herbs and house plants without soil. Clearly illustrated with black and white line drawings, the book covers every aspect of home hydroponic gardening.

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