AdrianMariano
New Member
I'm planning to redo my kitchen sink soon, and I was looking in Rex Cauldwell's book on Remodel Plumbing and noticed that he recommends a completely different drainage setup than what I understand to be the norm.
The usual pattern would be to connect the sinks together with a T which feeds into the trap and then out to the drain line. Many of the connections here are done with slip joints. Cauldwell claims that slip joints tend to fail after a few years or if they get bumped, and he sees tons of rotted out kitchen cabinets as a result of this construction. He also complains that this pattern uses pipes which are quite narrow and constrict the flow too much. (And I have to admit that some of the T connectors I've seen do have only a 1/2 inch wide space at the intersection.)
Instead he recommends a drainage pattern where he uses 90 degree fernco connectors at each sink and connects to sch 40 1.5 inch pipe which he runs horizontally from each sink towards the back of the cabinet. He then runs those lines down the back of the cabinet, joints them with a Y fitting, followed by the trap, and then a final fernco connector to go into the drain. (Part of his goal is to get the drainage stuff back and out of the way.) Everything is glued together except the fernco connectors. He claims that these ferncos are less likely to leak than the slip joints, even in environments where the drainage gets bumped around a lot. If you need to open it up to clean out the trap or snake the drain you disconnect the ferncos.
What do people think about this alternate drain arrangement?
The usual pattern would be to connect the sinks together with a T which feeds into the trap and then out to the drain line. Many of the connections here are done with slip joints. Cauldwell claims that slip joints tend to fail after a few years or if they get bumped, and he sees tons of rotted out kitchen cabinets as a result of this construction. He also complains that this pattern uses pipes which are quite narrow and constrict the flow too much. (And I have to admit that some of the T connectors I've seen do have only a 1/2 inch wide space at the intersection.)
Instead he recommends a drainage pattern where he uses 90 degree fernco connectors at each sink and connects to sch 40 1.5 inch pipe which he runs horizontally from each sink towards the back of the cabinet. He then runs those lines down the back of the cabinet, joints them with a Y fitting, followed by the trap, and then a final fernco connector to go into the drain. (Part of his goal is to get the drainage stuff back and out of the way.) Everything is glued together except the fernco connectors. He claims that these ferncos are less likely to leak than the slip joints, even in environments where the drainage gets bumped around a lot. If you need to open it up to clean out the trap or snake the drain you disconnect the ferncos.
What do people think about this alternate drain arrangement?