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A: None of them! 1/2" Copper pipe measures 5/8" OD. 1-1/2" Sch 40 PVC measures 1.90". The Engineer in me knows that 1-1/2" NPSM measures 1-7/8"-11.5 Meaning the inside thread of the female receiving tube is 1-7/8" diameter and it has 11.5 threads per inch. The other commonly used drain thread size is 1-1/4" NPSM (also called 1-3/8" NPSM). It measure 1-5/8" -16 which is an OD of 1-5/8" with 16 threads per inch.
A: Why does 1/2 in. Copper pipe measure 5/8 in. OD? Why is 1-1/2 in. Sch. 40 PVC measure 1.90 in. OD? Plumbers are not carpenters nor are they engineers. Even though the plumbers in the world call that size 1-1/2" NPSM coarse thread, the engineers in the world call that size 1-7/8"-11.5 UNC-2A. They are just two different ways of talking about the same thing from two different points of view.
A: The overflow plate is purchased separately. We have several different styles to work with this drain depending on your drain needs. Please see D328-11, D329-11 or D980R-11.
A: If your tub stopper measures 1-7/8" - 16 thread, Westbrass does not carry that size.
|Name||1-1/2 in. NPSM Twist & Close Bathtub Drain Plug, Coarse Thread, Polished Nickel||1-3/8 in. NPSM Fine Thread Twist-and-Close Bath Drain Plug in Matte Black||1-3/8 in. NPSM Fine Thread Twist-and-Close Bath Drain Plug in Oil Rubbed Bronze||1-1/2 in. NPSM Twist & Close Bathtub Drain Plug, Coarse Thread, Stainless Steel|
|Drain Cover Type||Circular||Circular||Circular||Circular|
|Plumbing Part Type||Drain||Drain||Drain||Drain|
|View Product||View Product||View Product||View Product|