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Installing traps.

A trap is an S-shaped or a P-shaped fitting attached to the tailpiece (or fixture drain). When the fixture finishes draining, some water remains in the trap as a fresh waterblockage against sewer gas. Traps should be kept in good repair to prevent the potentially dangerous entry of this gas into the home.

The only difference between the S-trap and the P-trap is the position of the outlet tube. The S-trap outlet tube is inserted vertically into the floor (Figure 1); the P-trap outlet tube is inserted horizontally into the wall (Figure 2).


1. Remove nuts and washers on J Bend and place them onto the tailpiece and the outlet tube. Make sure the nuts go on first, then the washers (Figure. 3).

2. Slide long end of J Bend over the tailpiece (Figure 4).

3. Place escutcheon on outlet tube and attach outlet tube to the drain connection. Push escutcheon down to floor (Figures 5 and 6).

(The same steps are taken to attach a P-trap fitting to a wall outlet tube [Figure 7]). 4. Slide short end of J Bend over outlet tube. Tighten both nuts with a 12-inch adjustable wrench (Figure 8). (If using a pipe wrench, place a soft cloth on nut to protect finish.) Connections must be tight in order to avoid leakage. Since there is little internal pressure on a drain line, the

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Title Annotation:pipe traps
Publication:Pamphlet by: Cornell University Cooperative Extension
Article Type:Pamphlet
Date:Jan 1, 1994
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