Blanco Supreme 533-U sink drain leaking at seal
The sink basket/strainer that fits into the large hole of the sink should have either a bead of silicone sealant applied to the sealing lip of the assembly or a ring of plumbers putty. Silicone will work very well if the mating flanges are clean and dry.
With the baket in place, the rubber seal goes between the large nut and the sink. A bead of silicon on this is optional on the sink side of that rubber seal. and the nut tightened down snug , forcing some of the silicone out fro beneath the mating flange and rubber seal. Tight enough so the basket is not free to move. Be it plastic or brass/metal, that order is the same, only a plastic nut is not tightened as tightly as a metal nut would be.
On the bottom of the drain basket assembly there is a nut, to retain a plastic or brass tail piece. The plastic tail piece will have a polyetheylene "flanged washer" for a seal to the bottom of the sink basket. If it is a brass tailpiece, a rubber seal and metal nut is used with "pipe dope"/thread sealing compound used on the threads of the metal nut. With the plastic nut, you can apply a few wraps of teflon tape to the threads of the drain basket, but is not required in most cases as the poly flanged washer will form the seal. The plastic nuts should not be tightened any more than hand tight.
beneath that, the rest of the drain assembly attaches. If plastic- no more than hand tight. if metal, only about 1/4 turn past hand tight. Metal nuts and parts should use rubber gaskets/seals and the plastic parts should only use the poly tapered/lip seals.
Jan 15, 2012 |