4-34. Upper Manifold
Relief Valve And Elbows
(1) Remove the nut (4, fig.
(Used Only On Army Models SPE 41, SPE 44, SPE
secures the tube (5) to the elbow (1).
45 and York-Shipley Model YS49279)
(2) Unscrew and remove the elbow (1) from
a. Description. This valve (2, fig. 4-31)
the relief valve (2).
on the water heater upper manifold and adjacent to the
(3) Unscrew and remove the relief valve from
water temperature gage sensing element.
the street elbow (3).
pressure in the water heater exceeds 60 pounds per
square inch, the valve opens automatically to relieve the
(4) Unscrew and remove the street elbow
from the upper heater manifold.
b. Inspection. Inspect for broken, bent, or cracked
d. Installation. Replace defective relief valve and
valve and elbows.
elbows with serviceable ones, and install them by
reversing the procedure in c above.