Yes a clogged VENT pipe can cause a sluggish drain
Yes.
Leak on drain line above floor level
It may, the drain holes are critical in sun roofs and all automobile doors.
The best option is to purchase a sink strainer to place ontop of the opening to the drain. This will prevent hair and soap and dirt reside from staying inside the drain.
You need to check for a clogged pipe .
There are multiple reasons why your washing machine might not drain. The drain line could be clogged with debris or even clothing, the pump pulley could be frozen, or the pipe that the washer drains into could be clogged.
What makes a bathroom drain smell, soap makes a bathroom drain smell
Water won't drain from shower. Either trap or shower drain line is clogged.
You would have a severe reduction of the drainage fixture units that would be able to drain
This is not advisable beside not being legal, This may potentially cause sewer gas leak into your resident.
Drain line is clogged.
Toilets that bubble when flushed and drain slowly can be cause by different things, such as port holes that are clogged, a clogged drain line, the tank has a low water level, or a problem in the vent pipe. A plumber can check for the specific problem and fix it.
Kitchen sink and washer use same drain line. Drain line clogged causing backup of drainage from washer into kitchen sink. Have drain line unclogged to take care of problem. If drain line not clogged, check for proper venting of drain lines.