
To correctly size the 90mm UPVC pipe for your RAIN HARVESTING TAVK03 Auto Vacuum Poly Tank's suction riser, adhere to these straightforward steps. First, affix the 90-degree flanged elbow directly to your tank's overflow outlet. Next, position the toothed coupling at the base of your rainwater tank. Accurately measure the distance extending from the 90-degree flanged elbow down to the toothed coupling. Finally, using this precise measurement, cut a corresponding length of 90mm UPVC pipe for the suction riser. This method ensures an accurate fit for your tank vacuum system installation.


