vailable to accomplish the same thing, if you need to spend the money. Using this technique, you can save up to two gallons per flush. Early advice was to put bricks in the reservoir. Don't. They will erode and cause plumbing problems. And don't displace SO much water that the toilet doesn't flush prop- erly. If problems are encountered in removing material deposited in ONSITE WASTEWATER DISPOSAL the bowl when the toilet is flushed, reduce the amount of water displaced in the tank. Another add-on is the dual-flush device. For a modest invest- ment, you can buy a mechanism that will allow you to lift the toilet flush handle to release a couple of gallons less of water for flushing away liquid wastes. Pushing down on the handle releases the nor- mal volume of water to flush away solid wastes. Finally, you can gain more control over the amount of water used per flush by adding a weight to the plunger covering the hole at the bottom of the reservoir. Tie a weight to the plunger rod with nylon thread or fishing line, or wrap solder around the rod. The added weight will let the plunger drop when you release the flush handle. To reduce the amount of water that comes out of the faucets, simply partially close the supply valves under the sink. First, open the faucet fully, then crank down the supply valve until you get the flow you want. Faucet aerators also work to conserve water, because the air introduced takes up some of the volume of the water stream. If the end of the spigot has threads, add an aerator. Low-flow shower heads are commonly available. Look for one that delivers three gallons per minute or less. Or, if you want to conserve money as well, install a flow restrictor between the shower head and the supply pipe. Flow restrictors can be as simple as a washer with a 0.25-in. hole in the center. Be aware that if you cut the shower flow by half, but shower twice as long, your septic system will receive no benefit. If the water pressure in your house is high (above about 35 pounds per square inch) you can reduce 