Recently I purchased a Delta (one handle) faucet for my tub/shower.In the instructions it says the male threaded connections are 1/2 in ISPM and the sweated connections are 1/2 in CWT fittings. What does ISPM and CWT stand for???? I went back to Home Depot,where I purchased the faucet, and they didn't know. Any and all replys would be appreciated. Thanks!!!!
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