Putting together my new Eheim 2262 and had a quick question about the Drain Valve
How is the Washer facing the Drain Valve "Groove Side" or "Flat Side" Does the Rubber Gasket sit on the out side of Container
The rubber o-ring/gasket slips onto the threaded portion of the drain valve so it is on the OUTSIDE of the canister body.
I have the flat face of the nut facing the wall of the canister body or toward the drain valve. I really don't know if it makes a difference but I checked my spare 2260 to double check how it is installed.
Don't over tighten the drain valve into the nut as there is the potential to crack the plastic nut. I had to buy spare nuts for a used 2260 I purchased because the drain valve leaked due to the cracked nut.