32CDFLFR103 | AquaStar Channel Drain 32in Light Gray

What steps should be taken to properly size covers for a suction system?

1. Determine the Design Flow Rate The flow rate needed for proper function

Example: e.g. 4 Spa Jets @ 20 GPM each = 80 GPM​

2. Size Pipe to Not Exceed 6 fps or 8 fps

Refer to the chart labeled Max GPM Capacities of Pipes

Example (continued): The pipe needs to be minimum 2-1/2''  2-1/2'' Pipe @ 6 fps = 90 GPM

​3. Select a Pump That Can Deliver

Review example Pump's Model Specific Performance Curve

Example (continued): 0 GPM through 2-1/2'' pipe and overall system e.g. Pump with max flow of 164 GPM

​4. Select a Drain System With A VGBA Flow Rating higher than the maximum flow potential of the pump.*

Select a drain system with a higher flow rating than the highest potential flow rate. See "highlighted area" in Pump's Model Specific Peformance Curve Example
Example (continued): e.g. A10RCFRxxx, qty 2, with max flow using a 2.5'' pipe of 170 GPM, see specification sheet.

​*NOTICE: Pump flow potential is best determined by measuring flow or measuring the TDH of the system during high-speed, clean-filter operation and then looking up the actual flow using the manufacturer’s published pump curve. To avoid oversizing drain covers and suction piping, the use of a flow meter or the TDH measurement method is suggested for pumps larger than 3 HP.