Check to make sure that the pipes connected to the trap have been installed properly.
1. Is the pipe diameter suitable?
2. Has the trap been installed within the allowable inclination and with the arrow on the body
pointing in the direction of flow?
3. Has sufficient space been secured for maintenance?
4. Have maintenance valves been installed at inlet and outlet? If the outlet is subject to back
pressure, has a check valve been installed?
5. Is the inlet pipe as short as possible, with as few bends as possible, and installed so that the
condensate will flow naturally down into the trap?
6. Has the piping work been done with the proper methods as shown in the table above?
7. Has the pressure-balancing line been connected to the trap and the receiver tank or the air
section of the main as shown below?
5. Piping Arrangement
Requirement
Diameter is too
small.
Diameter is too
small and inlet
protrudes into pipe.
Rust and scale
flow into the trap
with the
condensate.
Condensate
collects in the
pipe.
Correct
Incorrect
Install a catchpot with the
proper diameter.
Make sure the flow of
condensate is not
obstructed.
To prevent rust and scale
from flowing into the trap,
connect the inlet pipe
25 - 50 mm (1 - 2 in) above
the base of the T - pipe.
When installing on the
blind end, make sure
nothing obstructs the flow
of condensate.
Receiver Tank
Air Main
Pressure-balancing
line
Pressure-
balancing
line
6. Operational Check
A visual inspection can be done to help decide about necessary immediate maintenance or repair
if the trap is open to atmosphere. Use diagnostic equipment; such as a stethoscope, thermometer
if the trap does not discharge to atmosphere.
