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INTERCEPTORS
Factors Affecting Grease interceptor Performance
Velocity of Incoming Water
A higher velocity of water will contribute to turbulence and slow the grease separation process, thereby reducing
efficiency. Installation of additional flow control devices at all the sources of flow may be required.
Grease to Water Ratio
Higher ratios of grease particles to the water will the lower the efficiency of the interceptor – If high ratios of water to
grease are anticipated, increase the size of the interceptor one or two units.
Detergents in the System
Degreasing agents or grease cutting detergents will break down the liquid grease into minute particles that can cause
slower separation time, thus allowing these particles to pass through the interceptor. Increasing the size of the
interceptor will allow longer retention rates and improve the efficiency.
Flow Capacity
If maximum recommended flow rates are exceeded, the efficiency of the interceptor will be decreased. Either install
additional flow controls devices at all sources of flow, or install a larger interceptor.
Specific Gravity of Filtrates
Grease has a lower specific gravity than water and will separate and rise to the surface quickly. If the waste water has
food particles or solids having a higher specific gravity than water, these filtrates will accumulate at the bottom,
eventually passing out of the interceptor. If high concentrates of solids are anticipated, the installation of a solids
interceptor is recommended.
Installation Location
The interceptor should be located as close as possible to the source of grease. Piping to the interceptor could become
clogged if the liquid cools prior entering the interceptor.
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Wade Drains ‐ 11910 CR492, Tyler, TX, 75706 ‐ Phone: 800‐638‐9537 Fax: 888‐879‐9233 ‐ www.wadedrains.com
3‐29‐17
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