Under my house in a crawl space water drains from the washer and kitchen sink into a T.
The PVC pipe then goes forward and makes a right turn toward a iron drainage pipe.
The pipe sags before it makes the turn so there is some water draining out. What would be the best way to securely anchor the PVC pipe while providing the proper decline needed to drain the water?

We use galvanized band iron to strap our pipes up. Place a level on the pipe and be sure the bubble rides a bit over the line on the up side . Good luck, Tom