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Installation and Operating Procedures
Manual
Grease Interceptors
60100H
SERIES
Josam Company
525 W.U.S. Hwy 20
Michigan City, IN 46360
1-800-365-6726
www.
JOSAM.com
WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
60210A
SERIES
REV A 04/15/11
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MANUAL INTERCEPTOR
Installation and Operating Instructions
Table of Contents
1.0 General Description .................................................................................................3
2.0 Installation ................................................................................................................3
3.0 Flow Control and Venting .........................................................................................4
4.0 Grease Removal Maintenance .................................................................................5
5.0 Periodic Unit Cleaning..............................................................................................5
6.0 Troubleshooting........................................................................................................6
7.0 Typical Installations ..................................................................................................7
8.0 Warranty...................................................................................................................8
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MANUAL INTERCEPTOR
Installation and Operating Instructions
1.0 General Description
Grease interceptors serve the purpose of separating grease from water so that
cleaner water is allowed to continue on in the drainage line. Manual interceptors
(units without an automatic grease removal function) require regular checking and
grease layer removal.
FOG (fats, oils, and grease) from kitchens is less dense than water and therefore will
naturally separate to the top over time. Units that rely only on this difference in
density for grease separation are termed “gravity-type” units. These types require a
very large holding capacity so that separation has ample time to occur before water is
passed on.
“Hydro-mechanical” type units are designed to separate FOG more efficiently using
an air intake, flow control, and baffle system. This engineered approach allows for a
smaller capacity unit than a gravity-type unit for the same application.
Josam interceptors are hydro-mechanical types designed to meet or exceed industry
standards PDI-G101 and ASME A112.4.3.
2.0 Installation
Locate the grease interceptor as close as possible to the fixture(s) being served.
This will reduce the length of piping subject to grease-laden wastewater and minimize
the risk of blockages.
Do not allow solids to enter the grease interceptor. Solids can accumulate in the
bottom of the interceptor and eventually block the outlet. Decaying solids are a
primary source of objectionable odors and can produce dangerous gases. Consider
strainers in fixture outlets or a solids interceptor upstream of the grease interceptor.
Interceptors can be located on-floor, recessed, or on a level below. Plan for
connections to piping and the need to remove the cover and baffle for grease
removal and periodic cleaning. (Reference separate baffle drawing for dimensions.)
Cleanouts are provided near the outlet end of the interceptor and may be internal or
external to the grease separation chamber. Removal of the interceptor cover may be
necessary to access the cleanout.
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MANUAL INTERCEPTOR
Installation and Operating Instructions
Provide cleanouts as necessary in the piping from the fixtures to the interceptor as
this area is subject to grease-laden wastewater which can congeal and cause
blockages.
It is recommended to use a separate grease interceptor for each commercial
dishwasher. Refer to the dishwasher specifications regarding discharge flowrate and
size the interceptor accordingly.
If the cover of the interceptor will be subject to loads greater than foot traffic, a unit
with a higher load capacity cover will need to be installed. Specify this option at time
of unit order.
If the grease interceptor is serving a source of high concentration levels (i.e. a fat
drippings tray in a rotisserie cooker), the grease must be diluted with water before
entering the pipeline leading to the interceptor.
CAUTION: Installation except as instructed, tested, and rated may result in
performance failure.
CAUTION: Please take proper precautions when installing these units. Many
models will require multiple people or machinery to position for installation.
Always consult local code requirements before installation.
3.0 Flow Control and Venting
A flow control with air intake connection is supplied with each interceptor. This flow
control has been properly sized for this specific interceptor unit.
The orifice size and air intake are key components in a hydro-mechanical interceptor
design. Performance testing to industry standards and unit rating are dependent on
the use of the proper flow control and correct installation location.
The flow control should be placed after the last fixture being served and before the
grease interceptor. The air intake must be properly vented to allow air to mix with the
wastewater flow as it enters the interceptor to aid in grease separation.
The air intake may be connected to the vent stack if the fixtures themselves are
trapped and vented.
In order to prevent siphoning, the outlet of a grease interceptor must be vented.
Reference appropriate plumbing codes for venting requirements.
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MANUAL INTERCEPTOR
Installation and Operating Instructions
4.0 Grease Removal Maintenance
Regular maintenance is critical to the proper function of a manual grease interceptor.
If grease is not removed, separation performance can deteriorate resulting in
unacceptable levels of grease being passed downstream. Failure to maintain a
grease interceptor has resulted in penalties and fines to the responsible
establishment.
A regular maintenance schedule should be set, but will vary in time by installation site
due to differences in usage frequency and grease concentration. Grease removal
intervals can range from days to weeks.
After installation, the buildup of grease should be monitored. As a rule to maintain a
high level of performance, the grease should be removed when its layer is no more
than 25% of the depth of the interceptor. This buildup rate should be checked for
several cycles before setting a schedule without monitoring.
Regular Grease Removal Maintenance Instructions
Loosen cover securing fasteners and remove cover
Lift out baffle and wipe clean
Remove the separated layer of grease and dispose properly
Check the cover gasket and replace, if needed
Replace the baffle and cover and tighten securely
5.0 Periodic Unit Cleaning
In addition to regular grease removal, a complete unit cleaning should be scheduled
at least twice per year. This will ensure a clear outlet pathway to minimize the risk of
blockages and help maintain optimum grease separation performance. The unit
should be emptied of all liquid and any solids or sludge removed. Wipe the inside of
the unit clean and replace the baffle and cover securely.
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MANUAL INTERCEPTOR
Installation and Operating Instructions
6.0 Troubleshooting
Problem
Water is backing up into the fixtures
Recommended Solution(s)
Remove grease build-up from interceptor
Remove sludge or solids that may be blocking interceptor outlet
Check cleanout and pipes for blockages
Problem
There is a bad odor coming from the interceptor
Recommended Solution(s)
Perform a periodic unit cleaning to remove decaying solids
Check for proper venting
Inspect cover gasket for proper seal
Problem
The interceptor is passing grease downstream
Recommended Solution(s)
Remove grease build-up in interceptor
Increase frequency of grease removal
Increase size of interceptor
Problem
The pipe leading to the interceptor block regularly
Recommended Solution(s)
Check for source of high grease concentration
Add water to highly concentrated grease before entering pipe
Frequently flush clean water down pipe
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MANUAL INTERCEPTOR
Installation and Operating Instructions
7.0 Typical Installations
ON-FLOOR FLUSH WITH FLOOR
RECESSED
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MANUAL INTERCEPTOR
Installation and Operating Instructions
8.0 Warranty
Josam Company warrants the Manual Grease Interceptors to be free of defects in
workmanship and material for a period of one (1) year following the date of shipment.
Josam shall not be responsible for any labor charges or any loss, injury or damages
whatsoever, including incidental or consequential damages. The sole and exclusive remedy
shall be limited to the replacement or repair of the defective goods at the Seller’s discretion.
Evidence of vandalism, unauthorized modifications, acts of God, or failure to follow
installation and operating instructions will void this warranty.
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