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Service and Mainternance
General
1. Detailed maintenance manuals are
available from your local Febco
representative.
2. Rinse all parts with clean water prior to
reassembly.
3. DO NOT USE ANY PIPE DOPE, OIL,
GREASE OR SOLVENT ON ANY PARTS
unless instructed to do so.
Check Valve Disassembly
1. Close the outlet shutoff valve, then close
the inlet shutoff valve. Bleed residual
pressure from the assembly by opening
the #4, #3, and # 2 test cocks in this
sequence.
2. Remove the cover bolts/nuts and lift the
cover from the body. The springs are
retained and the cover should be pushed
away from the body approximately
inch.
Test Procedure for Double Check Valve Assemblies
FEBCO recommends the use of the
appropriate annual test method presented
in the ASSE Series 5000 manual that is
consistent with your local codes.
Troubleshooting
PROBLEM
1. Check valve leaking
2. Low flows passing through
mainline valve (DCDA).
4. Do not force parts. Parts should fit
together freely. Excess force may
cause damage and render the assembly
inoperable.
5. Carefully inspect seals and seating
surfaces for debris or damage.
6. After servicing, repressurize the
assembly and test to ensure proper
operation.
3. Inspect/clean debris from the disc and
seat ring. Replace worn or damaged
parts as required.
4. Replace the cover, ensure the spring
assembly is positioned in the pivot
socket. If necessary, apply FDA approved
grease to the O-ring groove in the body
to keep the O-ring in position while
⁄
installing the cover.
1
4
5. Install the bolts and nuts and tighten.
CAUSE
a. Debris on seating surface
b. Leaking shutoff valve
a. Mainline check fouled
b. Bypass line plugged
4
SOLUTION
Disassemble and clean
Disassemble and clean
Disassemble and clean
Disassemble and clean
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