Circular saw: Look for 12 amps minimum, to cut metal and concrete with the appropriate blade.
圆锯：查找最低限度12安培，辅以合适的刀片用于切割金属和混凝土。
3
If you can't unscrew the drain flange from the T-connector, use a reciprocating saw with a metal-cutting blade and cut the drain assembly away just above the T-connector.