I need to replace the overflow plumbing on my kiktchen sink due to it cracking. The overflow is located on the draining board of the sink, not the side of the sink bowl, is rectangular and connects to the sink waste. B&Q sell one but it is the wrong size and I have searched high and low. Anyone any ideas on the best place to check for a replacement. BTW, it's a Leisure sink, probably about 3-4 years old, single bowl.
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