BASO H15 Series 100% Shutoff User Manual
Page 2

2 H15 Series BASO 100% Shutoff Automatic Pilot Valve Installation Instructions
6.
Pilot gas connections.
a.
Internal Pilot Gas Valve Models receive pilot 
gas internally from the valve body. 
Note: Pilot gas flow comes out of either gas 
valve top housing ports. 
On internal pilot gas valve models, plumb the 
pilot burner fitting to either of the pilot gas 
ports on the valve. Plug the unused pilot gas 
port on the gas valve. See Figure 1 and 
Figure 2. 
b.
External Pilot Gas Valve Models receive 
pilot gas from an external gas source. 
Note: Pilot gas flow through the gas valve top 
housing can be in either direction as indicated 
by the arrows. 
On external pilot gas valves models, plumb 
the pilot gas line from an external gas source 
to either pilot gas port on the gas valve. Plumb 
the other pilot gas port to the pilot burner 
fitting. See Figure 3. 
c.
Gas valve models with black arrows are 
limited to applications up to 175˚F (80˚C). 
d.
Gas valve models with red arrows are limited 
to applications up to 300˚F (150˚C). 
!
WARNING: Risk of Explosion or Fire.
Never connect an external gas line to an internal 
pilot gas model. Pilot gas would flow freely in one 
port and out the other, which could lead to an 
explosion or fire and may result in severe personal 
injury or death. 
!
WARNING: Risk of Explosion or Fire.
Verify that there are no gas leaks by testing with 
appropriate equipment. Never use a match or lighter 
to test for the presence of gas. Failure to test 
properly can lead to an explosion or fire and may 
result in severe personal injury or death. 
7.
Check for leakage.
a.
Shut off the gas at the main manual shutoff 
valve and open the pressure connection 
between the manual shutoff valve and the 
H15 valve. 
b.
Connect air tubing with a maximum pressure 
of 1-1/2 times the valve’s maximum 
operating pressure (as indicated on the 
valve) to the opened pressure connection. 
c.
Paint all valve body connections with a rich 
soap and water solution. 
If bubbles occur, this is an indication of a 
leak. To stop a leak, tighten joints and 
connections. Replace the part if the leak 
cannot be stopped. 
If bubbles do not occur, remove the air 
tubing and close the pressure connection. 
8. Perform
the
Checkout before leaving the
installation.
