add T to existing black pipe

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free75degrees said:
As an alternative to a union, would a pair of taco circ flanges without the circ in the middle work? Just put a single gasket in the middle and bolt them together.

Yup. Just more likely to leak. I've done that where installing a union was impractical (down in a hole where there was no way to get a pipe wrench on a union - a ratchet and extension easily tightened the flange bolts from outside the hole).

Joe
 
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