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Assembly Overview

EBB-FLO® flood benches are custom made to fit specifications with all parts pre-cut, pre-drilled and ready to assemble with glue and furnished fasteners included. A set of assembly instructions are also included with EBB-FLO® flood benches. Please read the instructions thoroughly before assembling to have a better overview of the project, and to plan the integration of other items such as locating underground plumbing lines, control cables for solenoids or installing concrete walkways.

There are two types of legs that are furnished with EBB-FLO® flood benches, depending on your application. The most common and most economical type are the legs set in concrete. These legs (with leveling headers) are ready to have the rolling pipes, and the rest of the bench frame work assembled on top (Image 1).

Image 2 shows the same area after much of the bench top frame work has been assembled, and the concrete walkways have been poured between the legs.

The freestanding leg sit on the floor and are connected and supported by stringers attached to the legs with square to square clamps. These are useful when there is already a concrete floor (especially one with heat pipes imbedded in the floor), or where smaller benches are used and can be portable (Image 3).

After the legs are assembled and the concrete is set up, rolling pipes are set on top of the leveling headers, the bench frames are assembled, and the plastic trays are aligned and glued together. Once these parts are complete, the plumbing can be hooked up and leveled. 

Shady Hill Gardens, Elburn, IL

 

 

Plumbing

EBB-FLO® flood benches can be filled and drained about 50 feet from one location. Longer benches need to be filled from two or more locations. The wells, or sumps where plumbing connections are made, are molded into the end trays of the plastic EBB-FLO® liners. For benches up to 50 feet in length, the plumbing can be connected to one end of the bench. If the bench is longer, it will be necessary to run plumbing to both ends, or split the trays on the bench into two or more parts. Splitting the trays on a bench into two halves is the most common way to use longer benches. The fill and drain lines can be run to the center of the bench instead of to both ends, ultimately saving on pipe and fittings.

Most installations with more than one "zone" use the fast fill valve for the connection of the plumbing to the EBB-FLO® flood benches. The fill valve uses a simple venturi principle, has no moving parts, and is very reliable. The fillvalve provides both fill and drain to the bench tray at the one location. As soon as the zone (solenoid) valve is opened, the bench begins filling through the fill valve, and the water is aerated at the same time. As soon as the zone valve is closed, the drain on the fill valve establishes a siphon that rapidly drains the bench.

The drain line drains by gravity to a sump pit (with a high capacity sump pump) if the storage tank is above ground, or directly into the tank if it is located below ground. Tanks located above ground are typically the white polyethylene type available locally at the farm supply store. Below ground tanks can be similar tanks (that are designed for below ground use), or concrete such as a septic tank. Each has its advantages and disadvantages. Above ground tanks are much easier and cheaper to install and maintain, however they do take up valuable space, and if placed in the greenhouse exposed to light, they can have tremendous algae growth. (this can be prevented by painting the tanks black, or not locating them in the greenhouse). Below ground tanks cost more and are more of a problem to install and clean out, etc. However they have no problems with algae growth, and eliminate the need for a sump pump to move the water from the gravity drains from the benches back into the storage tank, and they don't take up any valuable space.

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Gluing Instructions

How to glue Ebb-Flo® Benches.