My 37+ has a vented loop behind the vanity. I converted the port side water tank to holding for the Great Lakes. I installed a check valve in the aft sink but shut off the v birth sink when sailing using a 1/4 turn valve in the drain. It’s pretty easy to bury the rail in a blow. I try to reduce sail but it’s just too much fun. If you remove the stainless shower pole, plexi glass and the cabinetry you can access a few things but its unlikely you can get as far as the vented loop. The whole vanity is tabbed to the hull with 3 inch glass tape. Look over top of the vanity for the loop. It’s built in so you cannot service it easily. You can get to anything with a grinder and diamond blade if necessary. If you are ever up north I can show you what it looks like, changing out the aluminum holding tank for plastic was a real PIA. I recommend a shut off valve in every holding tank in case the joker valve fails and it will. Shitty job if it does. Len
Sent from my mobile device. _______________________________________________ Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray
