1.5" FPT Flanged Fitting with the 2" seal, creating a water tight, fairly flush seal on a holding tank. 

Requires a 3" hole cutout

Instructions

1-Cut hole with holesaw to the size indicated.

2-Ensure that the hole is cut clean. Irregular holes could cause poor seating and possible leaks.

3-Insert the seal with the wide surface facing up

4-Use liquid soap or teflon lube on the adapter to be inserted. Insert the adapter into the seal until adapter sits flush on top of the seal The lubricant will be squeezed off of the adapter as it passes through the seal.