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GROUND JO{NT
UNION GAS CONTROL
{OPTIONAL) VALVE
_)_[- DR{P LEG
3" MIN. {SEDIMENT TRAP)
(76.2 m
CAP
FIGURE 19. GAS PIPING WITH FLEXIBLE CONNECTOR.
A sediment trap shall be installed as close to the inlet of the
water heater as practical at the time of water heater installation.
The sediment trap shall be either a tee fitting with a capped
nipple in the bottom outlet or other device recognized as an
effective sediment trap. Ifa tee fitting is used, it shall be installed
in conformance with one of the methods of installation, shown
in Figures 19 and 20.
GROUND JOJNT'_ _ B LA_lk
UNION BLACK rlr_PiPE_
(OPTIONAL)
GAS
CONTROL
VALVE
3" MIN,
(76,2 m
CAP
FIGURE 20. GAS PIPING WITH ALL
BLACK IRON PIPE TO GAS CONTROL.
17