Here is the return that came with the Hayward skimmer from the pool package. The soft hose adapter is screwed out and the nut is approximately where it will be when the wall is figured in. Will I be able to screw on a 90° to this and have it hold and not damage things getting it tight enough? Below the 90 I want to put a ball valve/union and then below that the salt cell. If I need a different one can someone recommend what I need to get?