LEGEND MODEL T-50 pressure relief valves are for protection against excessive pressure. Recommended for all water system installations to protect against damage to piping and pressure tanks. They are set at 75 P.S.I. and are adjustable to 150 P.S.I.

Adjustment procedure:
1. Remove knurled access cap (Part #1)
2. Mark the position of the screwdriver slot in the disc (Part #3), in
relation to the body (Part #8); Using a permanent marker, make a
reference mark on the top edge of the body, at either end of the slot.
3. With a large flat-blade screwdriver, turn the disc clockwise to
INCREASE the relief pressure. One complete 360° revolution equates
to a 25 p.s.i. increase: 75 p.s.i. factory setting plus three complete
revolutions from the reference mark attains the 150 p.s.i. setting. 100
p.s.i. factory setting plus two complete revolutions from the reference
mark attains the 150 p.s.i. setting.
4. Replace the knurled cap. Do not over-tighten.