How to build a grease trap for a house

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What is a Passive Grease Trap?

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Passive grease traps are plumbing fixtures that contain pools of rotting food waste.Fats, oils, & Grease (FOG) are lighter than water & float khổng lồ the top of the tanks.

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Passive Grease Traps (above ground) are metal or plastic tanks required in foodservice facilities khổng lồ prevent fats, oil, & grease from entering the sanitary sewer or septic system. Grease interceptors are large in-ground outdoor tanks that prevent FOG & food solids from entering the sanitary sewer or septic system at restaurant facilities.

Conventional Grease Traps are referred lớn as passive grease traps and gravity based grease traps. Grease Traps were originally designed over 100 years ago. Grease Trap giải pháp công nghệ has remained virtually unchanged since the 1880"s.

Grease Traps & Interceptors

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Restaurant wastewater enters Grease traps from 3-compartment sinks và automatic dishwashers. The grease trap tank acts as a reservoir holding the wastewater and food solids that enter the trap.As the wastewater cools, the fat, oil, & grease (FOG) harden và the food solids settle. The FOG, being lighter than water, floats khổng lồ the vị trí cao nhất of the grease trap. The wastewater is forced through the grease trap và out to lớn the sanitary sewer. The FOG và food solids remain in the tank, increasing in volume daily. Food solids và grease sludge (brown grease) settle lớn the bottom of the grease trap.

If you take a bucket of water & pour in FOG, the FOG will float lớn the top of the bucket & harden. A grease trap functions in the same manner. FOG fills a grease trap from the top of the tank to the bottom.The FOG fills the grease trap from đứng đầu down, displacing the wastewater from the middle of the grease trap and into the sanitary sewer or septic system. In-ground grease interceptors work in the same method but at a larger scale.

Grease waste (brown grease) in a conventional grease trap is difficult to measure. Grease traps must be disassembled lớn view the cấp độ of waste inside the trap. Grease traps are required by law to lớn be emptied or pumped out when the grease sludge occupies 25% of the tank.By-law enforcement have tools that measure the content levels of grease traps.

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Grease Trap design Issues

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Grease Traps were never designed to lớn stop 100% of the grease from reachingthe drain. A well maintained grease trap allows 15% of the grease in the wastewater khổng lồ perpetually flow into the sanitary sewer. Grease traps at full capacity discharge 100% of the restaurant grease và wastewater into the sanitary sewer. When a grease trap is full of grease sludge the trap is incapable of capturing any grease or food solids whatsoever.

Passive grease traps & grease interceptors do not control the inflow of restaurant wastewater.During busy automatic dishwashing và sink draining periods restaurant grease bypasses the grease trap. Conventional grease traps vày not have enough time to separate the FOG from the wastewater (retention time). The fast and hot outflow of wastewater from automatic dishwashers allows FOG lớn bypass the grease trap completely.

Grease Trap Pumping

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Grease trap pumping is having a large liquid holding truck come lớn your foodervice facility. The truck,, equipped with a large tank, brings the hoses inside the facility to the grease trap. The complete contents of the grease trap are pumped back into the truck"s tank. In-ground grease interceptors are pumped outside of the building. Grease trap pumping is typically performed when rank odours or grease blockages are discovered.

Be sure khổng lồ always get a quote first for grease trap pumping. Lượt thích every business their are always unscrupulous operators.A common scam of grease trap pumping companies is "skimming". Instead of the pumping company taking the complete contents of the grease trap the pumping company only takes off the very vị trí cao nhất layer of grease from the interceptor tank. Three quarters of the tank does not get pumped out. This practise will lead khổng lồ the grease trap backing up and overflowing.

Ask to see the grease trap before the lid is closed. This may save you money and nasty inconvenieces. Choose a reputable & licensed grease trap pumping company.

Passive Grease Trap Construction

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Stainless steel counters, sinks, dishwashers, and exhaust are a few of the restaurant standards incommercial kitchens. Inexplicably, Grease traps are made of steel, fibreglass, PVCand plastic. Rusted, leaking, or cracked grease traps cannot be easily repaired. Rusted grease traps must be replaced. Gasket và baffle repairs are frequent on conventional grease traps. Polyethylene or poly grease traps were designed và engineered to lớn outperform other plastic materials. Common for mechanical căng thẳng in a polyethylene fixture is where a hole is cut khổng lồ connect pipes, gaskets, và fittings. Polyethylene, though a strong chemical composition, does become brittle over time.

In-Ground Grease Interceptors

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Grease Interceptors are frequently sized at 1000 Gallon khổng lồ 2000 Gallons for restaurant use.Grease interceptors are tanks made of cement, PVC or fibreglass that hold the fats, oil, grease, and food solids.The interceptor tanks are usually buried khổng lồ the exterior of the restaurant.

To install a grease interceptor a large trench must be excavated. A cement footing is built to support the grease interceptor. The interceptor is placed within the trench. Pea Gravel (3/8 inch gravel) is poured into the trench to lớn occupy the space between the earth and the grease interceptor. A second cement slab is required at ground level. The cement slab at ground cấp độ is anywhere between 18 lớn 30 inches above the grease interceptor for various levels of support and potential traffic.

Part of the required install is an extension collar to connect the access hole at ground level và the grease interceptor approximately 30 inches below ground level. The access hole fitting is removed when the grease interceptor is pumped out. Approximate dimensions of a 200 Gallon grease interceptor are 65 inches (width) X 40 inches (height) x 32 inches (Depth). In total, with extensions a grease interceptor will sit between 70 và 80 inches below ground level. Grease interceptor pumping is a permanent on-going monthly expense. A 1500 Gallon in-ground cement Grease interceptor is pictured above.

Grease Interceptors fail between the 3-compartment sink and the Interceptor.The long length of pipe guarantees grease blockages.