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Gentlemen,

I have a 2009 BW 305 Conquest. My question regards the PEX water system installed. I recently developed a leak in the hot water tank, I decided to simply install a shut off valve on the PEX tubing feeding the tank so I could leave the water system charged while using the boat. But the 1/2" PEX parts I purchased were too large. Does anyone know what size PEX BW used? Is it metric (12mm), its larger than 3/8, Does PEX come in thin or thick wall? My first time ever working with PEX. I have not found anyone selling metric size.
Thanks,