I am installing a dishwasher in a vintage kitchen and have some challenges with the drain. Basically, the dishwasher just needs to be connected to my sink drain. I'm wondering what my options are for attaching the 7/8" dishwasher drain hose. I would like the finished plumbing to be chrome-plated brass, like the existing plumbing. Here are some photos of the situation. The DW goes in the cabinet opening on the right.
The biggest concern I have is, looking at the left-side drain assembly, there isn't a lot of vertical distance between the left sink basket and the drain opening in the wall. All of the tailpieces with wye I've seen have the dishwasher inlet at least 2 inches down from the top of the tailpiece.
Instead of dropping the whole assembly and using the "normal" vertical tailpiece with DW inlet, someone gave me the idea of installing a dishwasher inlet on the horizontal tube connecting the 2 sinks. It goes like this: cut the horizontal tube in two places, use a slip joint tailpiece with a wye (cut to size)"
and then use a straight slip joint union to join it all together:
What do you think of this idea? I have read (on this forum) that it doesn't matter how the DW drain is attached as long as it's before the ptrap. I have also read people's recommendations against this sort of horizontal alignment, and wondered why. What are your thoughts on this approach to my problem. Do you think the angle of the wye is great enough "encourage" the DW drain flow to go to the left to the ptrap instead of building up in the horizontal pipe and backing up into the right sink?
Option B: There is another cleanout/drain, under the right sink, that is capped off. There are no plumbing fixtures using the other drain/cleanout. It was once used by a sink in the bathroom overhead, which has been remodeled to use a different drain. Below the kitchen drain, it simply combines with the other drain pipes about 5 feet below. Given this, do you think it's reasonable or a bad idea to use this second drain for the DW drain? I could make a high loop to prevent backflow into the dishwasher by taking the drain hose from the dishwasher up high just under the counter top and then down to the right drain. Maybe there is some fitting I could use to directly connect the hose to the right drain. It would seem using the separate dedicated drain might provide better flow and affect the sink drain less so the sink could be used while the DW in operation.
Thoughts?
The biggest concern I have is, looking at the left-side drain assembly, there isn't a lot of vertical distance between the left sink basket and the drain opening in the wall. All of the tailpieces with wye I've seen have the dishwasher inlet at least 2 inches down from the top of the tailpiece.
Instead of dropping the whole assembly and using the "normal" vertical tailpiece with DW inlet, someone gave me the idea of installing a dishwasher inlet on the horizontal tube connecting the 2 sinks. It goes like this: cut the horizontal tube in two places, use a slip joint tailpiece with a wye (cut to size)"
and then use a straight slip joint union to join it all together:
What do you think of this idea? I have read (on this forum) that it doesn't matter how the DW drain is attached as long as it's before the ptrap. I have also read people's recommendations against this sort of horizontal alignment, and wondered why. What are your thoughts on this approach to my problem. Do you think the angle of the wye is great enough "encourage" the DW drain flow to go to the left to the ptrap instead of building up in the horizontal pipe and backing up into the right sink?
Option B: There is another cleanout/drain, under the right sink, that is capped off. There are no plumbing fixtures using the other drain/cleanout. It was once used by a sink in the bathroom overhead, which has been remodeled to use a different drain. Below the kitchen drain, it simply combines with the other drain pipes about 5 feet below. Given this, do you think it's reasonable or a bad idea to use this second drain for the DW drain? I could make a high loop to prevent backflow into the dishwasher by taking the drain hose from the dishwasher up high just under the counter top and then down to the right drain. Maybe there is some fitting I could use to directly connect the hose to the right drain. It would seem using the separate dedicated drain might provide better flow and affect the sink drain less so the sink could be used while the DW in operation.
Thoughts?
