Hello Edd...no vented loop on my 1990 37+. I checked and can see the waste hose enter the holding tank at the top of the tank. Have not had issues...yet! If you choose to do that, let me know how you fit in into the space there!
I did change out the entire pump assembly on a head rebuild last year, and the joker valve now works fine. Yuck. I will keep a spare...cs *Chuck Saur* 517 490-5926 Cell
_______________________________________________ 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
