Hello All I have a C&C 30 Mk 1, a fine old boat that has a history of different owners. Recently, we had a very cold snap with temperatures hitting the – 12to – 16 range. A good stress test for the boat’s plumbing for sure. To make a long story short, I need to know how the galley sink drainage ought to be configured on this boat. You can read more for detail, or simply respond. All information will be appreciated.
…. In the aftermath of the cold snap, I found that there was some seepage from the galley sink. And there I found an odd configuration. The 1.5-inch drain was stepped down to a 1-inch diameter hose that ran into the drainage for the cockpit. There a Y fitting was screwed into the seacock (a 1.5-inch diameter) that allowed the 1-inch drainage from the sink to drain into that seacock. The lip onto which the 1-inch sink drain line attached itself was pitifully short—about 1 inch, and below the water line. Not very safe and a configuration that can not fully drain the sink. The upshot is that I have to change the galley sink drainage system. The C&C 30 Mk 1 owners manual gives no details on this—but it does show that the cockpit and galley sink drainage are separate systems. The local chandlery folk advise me to install a new drainage thru-hull (with a gate valve) between the bottom of the sink and the waterline, to ensure that it drains properly. But this is a wide margin leaving me without a precise idea of where to put the thru-hull. And I am not sure whether I need an elbow under the sink--or how that ought to be configured. Can anyone tell me how the gally sink drainage was handled by C&C at the outset. Are there any specs or design principles that I could use to help me pinpoint these positions or design the new system? Your help will be appreciated. Best, Alex Netherton Dulcibella, Nanaimo BC
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