My overflow drain has gas

[BT05]

It's too bad that the adapter won't come undone from the bulkhead, maybe use more plumbing tape next time? I know that Western Pump doesn't sell 30 or 20 degree elbows since I was just in there last week looking for some 3/4" ones. You might want to try out spa flex with two couplers to get whatever angle you need or use it for your whole drain line. There must be some wierd quirk about your setup making this difficult... I hope it works out, overflow noise can be frustrating.