Field Safety Advisory
RegO Model 901C Service Valves
06/27/2022
RegO has become aware of a potential issue with the female POL threads on a limited number of
RegO model 901C3 and model 901C5 service valves. In some instances, the thread depth of the
POL outlet is less than specification, which could result in a leak of propane. Potentially affected
valves would have been installed in a limited number of Manchester Tank branded RV tanks
dated 2021 and 2022. THIS COULD RESULT IN A FIRE OR EXPLOSION AND

SERIOUS PERSONAL INJURY, PROPERTY DAMAGE, OR BOTH.
Which Valves May Be Affected? The affected valves have manufacturing date codes between
02X21 and 02X22. The ‘X’ represents any letter between A through E, which denotes the week
of the month the valve was assembled. The date code is marked on a wrench flat. Below is a key
to reading the date codes marked on the wrench flat of the valve and their locations. (See Figure
1.)

Valve Outlet
Connection
(POL Threads)

Date Code and
Model Number
Location (Flats)
Figure 1: Model Number and Date Code Examples

What Should Be Done? Contact a professional to locate the service valve on the container to
inspect the model number and date code to determine whether the valve is in scope. If the date

code does not fall within the specified range, no further action is required. If the date code falls
within the specified range, then follow the instructions below, depending on whether anything
is installed in the outlet of the valve and whether there is container pressure.

WARNING: FAILURE TO FOLLOW THESE STEPS AND REMOVE
FROM SERVICE ANY CONTAINER THAT CONTAINS A LEAKING SERVICE
VALVE COULD RESULT IN A FIRE OR EXPLOSION AND SERIOUS PERSONAL
INJURY, PROPERTY DAMAGE, OR BOTH.
WARNING: IF YOU ARE NOT A PROPERLY TRAINED LP-GAS
PROFESSIONAL, DO NOT ATTEMPT ANY OF THE STEPS OUTLINED BELOW, OR
TO OTHERWISE INSPECT, TEST OR ALTER THE SERVICE VALVE ASSEMBLY.
ATTEMPTING TO DO SO WITHOUT THE PROPER TRAINING COULD RESULT IN
A FIRE OR EXPLOSION, AND SERIOUS PERSONAL INJURY, PROPERTY
DAMAGE, OR BOTH.

1. If nothing is installed in the outlet of the valve:
a. Use the supplied go/no-go gauge POL nut to determine if the threads are the
proper depth. (See Figure 2.) If the threads are not the proper depth, securely
close the valve, remove the container from service, and replace the valve. Do not
use the container without first replacing the valve.

Go/No Go gauge Finger Tight
No Visible Groove = Good Part

Go/No Go gauge Finger
Tight = Needs Replacement
Visible Groove = Bad Part

Figure 2: Go/No Go Gauge POL Nut – Groove Cut Through Roll Stamp Information

b. Alternatively, close the service valve and attach a POL connector to the service
valve outlet with an air fitting installed on the ¼” NPT threads. (See Figure 3.)
i. Apply 50-100 psi air pressure back towards the outlet of the valve;
ii. Use a leak detection solution to determine if this connection is leak tight;
iii. If the connection is not leak-tight, securely close the valve, remove the
container from service, and contact your OEM, distributor, or dealer for
further guidance. Do not use the container without first replacing the
valve.

POL connector
POL threads
POL connector
¼” NPT threads

Figure 3: POL Connector for Air Test

2. If a POL connector is installed in the outlet of the
valve and there is no container pressure:
a. Remove the POL connector from the outlet of the service valve and use the
supplied go/no-go gauge POL nut to determine if the service valve threads are
the proper depth. (See Figure 2).
i. If the threads are the proper depth, no further action is required.
ii. If the threads are not the proper depth, securely close the valve, remove
the container from service, and contact your OEM, distributor, or dealer
for further guidance.
b. Alternatively, close the service valve and attach a POL connector to the service
valve outlet with an air fitting installed on the ¼” NPT threads. (See Figure 3)
i. Apply 50-100 psi air pressure back towards the outlet of the valve;
ii. Use a leak detection solution to determine if this connection is leak tight;
iii. If the connection is not leak-tight, securely close the valve, remove the
container from service, and contact your OEM, distributor, or dealer for
further guidance.

3. If a POL connector is installed in the outlet of the
valve and there is propane pressure in the
container:
a. If the service valve is open (and the entire propane system is pressurized), use a
leak detection solution at the valve outlet connection.
i. If no leaks are observed, no further action required.
ii. If a leak is observed at this valve outlet connection and tightening the
connection does not stop the leak, close the service valve and contact
your OEM, distributor, or dealer for further guidance.
b. If the service valve is closed:
i. Remove the POL connector from the outlet of the service valve and use
the supplied go/no-go gauge POL nut to determine if the service valve
threads are the proper depth. (See Figure 2 above.)
1. If the threads are the proper depth, no further action is required.
2. If the threads are not the proper depth, securely close the valve,
remove the container from service, and contact your OEM,
distributor, or dealer for further guidance.
ii. Alternatively, close the service valve and attach a POL connector to the
service valve outlet with an air fitting installed on the ¼” NPT threads.
(See Figure 3 above.)
1. Apply 50-100 psi air pressure back towards the outlet of the
valve;
2. Use a leak detection solution to determine if this connection is
leak tight;
3. If the connection is not leak-tight, securely close the valve,
remove the container from service, and contact your OEM,
distributor, or dealer for further guidance.

Should you have any questions, please contact your OEM supplier, distributor, dealer or RegO
customer service at 336-449-7707 or [email protected].
Sincerely,
Thom Hegman
Technical Advisor

100 RegO Drive, Elon, NC 27244 USA