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Typical Installation
Figure 1
18" min.
Refer to
Local Codes
N-pattern Installation
(Shown with strainer)
Figure 2
18" min.
Refer to
Local Codes
Vertical Installation
(Shown with strainer)
18" min.
18" min.
18" min.
Pipe Support
Furnished by
Customer
Service and Maintenance
• Rinse all parts with clean water before reassembly.
• Do not use any pipe dope, oil, grease, or solvent on any parts
unless instructed to do so.
• Do not force parts. Parts should fit together freely. Excess force
can cause damage and render the assembly inoperable.
• Carefully inspect seals and seating surfaces for debris or damage.
• After servicing, repressurize the assembly and test to ensure
proper operation.
6" min.
• For more information on maintenance, check with your FEBCO
representative or go to FEBCOonline.com.
Check Valve Disassembly
1. Close the outlet shutoff valve, then close the inlet shutoff valve.
Bleed residual pressure from the assembly by opening test
cocks No. 4, No. 3, and No. 2 in this sequence.
2. Remove the cover nuts and bolts and lift the cover from
the body. The springs are retained and the cover should be
pushed away from the body approximately 1/4 inch.
3. Inspect the parts and clean debris from the disc and seat ring.
Replace worn or damaged parts as required.
4. Replace the cover, making sure the spring assembly is posi-
tioned 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.
5. Install the bolts and nuts and tighten.
Relief Valve Disassembly
1. Detach the activation module, if installed, from the flood sensor.
2. Use two 1/2" wrenches to remove the sensor from the relief valve.
3. Remove the cap screws holding the cover to the relief valve
body, and remove the cover.
4. Remove the diaphragm and pull the internal assembly from the
body. If helpful, push the internal assembly with fingers through
the discharge opening.
5. Inspect for debris, damage, or fouling of the seat disc. Clean
or replace the rubber disc as required.
6. Reposition the internal assembly and diaphragm into the body.
7. Install the cover and cap screws.
8. Reattach the flood sensor to the relief valve and mount the
activation module to the sensor.
Test Procedure for Reduced Pressure Assemblies
Check the ASSE Series 5000 manual for an appropriate test
method that is consistent with local codes of the area.
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