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A sediment trap traps moisture and contaminants. This keeps them from going into heater controls. If sediment trap is not installed or is installed wrong, heater may not run properly. Continued 13 CONNECTING TO GAS SUPPLY Continued CHECKING GAS CONNECTIONS IMPORTANT: Hold pressure regulator with wrench when connecting it to gas piping and/or fittings. Regulator Heater Cabinet Manual Shutoff Valve * Test Gauge Connection * From Sediment Trap Figure 12 - Gas Connection * An A.G.A. design-certified