Went to replace our old tub spout and can't seem to find an adapter that will screw on. The pipe is threaded male that's about 1" in diameter. I've bought 2 different adapters to screw onto it, and neither will thread on. I looked into doing the DELTA FAUCET RP5834 to see if that adapter would fit, but it says it's for a 1/2" pipe, and mine is bigger than that. Any suggestions on what I should use?