Vent pipes must always rise from the drain, and you can’t go horizontally from the sink into a wall without creating an obstruction in the kitchen. Plumbers have two solutions.

The actual drain pipe that enters the kitchen sink cabinet must be no larger than a 1.5-inch pipe. This smaller pipe restricts the amount of water that enters the loop-vent system.

Q: My new kitchen is going to have a large island with my double-bowl sink in it. The young plumber and my contractor want to use some newfangled thing that just fits under the cabinet. They call ...

News; Home and garden; Ask the Builder: Using the humble plumbing loop vent for kitchen islands Sat., Aug. 20, 2022 This is the magic of a time-tested plumbing loop vent for island sinks. Don’t ...

Plumbing vent pipes confuse many, ... To prevent traps in downstream fixtures from being sucked dry like my friend's kitchen sink, you install a vent pipe, usually within 3 feet, ...

If the plumbing vent was blocked, the sewer would still drain quickly when the sump pump came on and the kitchen sink could become the vent. You might even hear it gurgling as air was pulled into ...

Plumbing vent pipes confuses many people. ... When the washing machine pump came on, his kitchen sink would gurgle and the water in the trap under the sink would be sucked dry.

If in fact your kitchen-sink plumbing does not have a vent pipe, that may account for the trap water being siphoned out. And once that happens, you can get an open line to your sewer system or ...

The short horizontal pipe draining your kitchen sink needs to be a smaller 1.5-inch pipe to restrict the amount of water entering the loop vent. The loop vent system looks like the giant letter P ...