In the process of installing new drain pipes under kitchen sink with
1-1/2" plastic. The directions show all the fittings using slip nuts and washers. All except where the two pieces of P-trap fit together. One side of the trap has threads..the other has a built-in flange which then takes a slip nut behind that....a completely different type of connection from the others.
My question is...is there supposed to be any kind of washer at that connection. I put it all together and the only place I had a leak was at that connection. I can't use one of the included washers because the slip nut will not then reach far enough to grab the threads on the other side of the connection.
Well it SHOULDN'T!![:0] Those darned things do need to be designed better. If snugging it up a bit more doesn't help (too much may distort or crack the plastic fitting), then just apply some pipe sealer sticky stuff on the flange male/female part. There's not enough pressure to blow anything out, so it should be fine. Or...maybe that ones faulty. If the surfaces are nicked or warped, exchange it for a new one.
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