8.After checking that all connections are tight and the drain valve near the bottom of the water heater is closed, go to “Filling the Water Heater”.
FIGURE 20.
SECTION B
COPPER (SWEAT) PIPING
(See Figure 19)
FIGURE 20A.
3. Place the vent pipe over the draft hood. With the vent pipe in position, drill a small hole through both the vent pipe and draft hood. Secure them together with a sheet metal screw.
4. Put two or three turns of teflon tape or pipe joint compound around the exposed end of the 1” NPT threaded nipples for 75 gallon models or 1.25” NPT threaded nipples for 100 gallon models, see Figure 21.
FIGURE 19.
1.Position the water heater so that the existing piping will require the shortest distance between connections. Make sure that you are able to reach the drain valve and all connections when the water heater is in place. This will make it easy to service the water heater. The water heater must be level before you begin the piping.
If a water heater is installed in a closed water supply system, such as one having a
2.Place the draft hood in the receiving holes where it connects to the water heater. The legs should snap in to give a tight fit.
Secure the legs of the draft hood with the supplied draft hood brackets, see Figures 20 AND 20A.
FIGURE 21.
5.Cutting custom lengths of copper pipe will be needed in this procedure. The pipe cutter is simple to use, screw the adjustment knob until the opening of the jaws will allow the cutters to be placed around the pipe. Then close the adjustment until the cutting blade is just tight against the pipe. Do not over tighten. Make one or two revolutions of the cutter around the pipe. Tighten the adjustment knob slightly, and revolve the cutters around the pipe once again. Continue this procedure until the pipe is completely cut in two.
6.Cleaning and brushing the piping and fittings is one of the most important aspects of sweat connections. Clean the ends of each piece of copper pipe with emery cloth as
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