In answer to cleaning the cushions, I worked with a local carpet and upholstery cleaning company and they were able to do a fine job of "restoring" them to a fairly acceptable condition. If I remember correctly I paid around $120 for all seventeen cushions.
I did a complete refurbish last winter of my boat and in the process, replaced all of the drain and sanitation lines. As for the Y-valve, I removed it (it too was frozen and broke when I tried to exercise it) and since I do stricly lake sailing I did not replace but rather routed the lines directly to holding tank which I use a pump-out to empty. I located my boarding/swim ladder off the transom using removable attachments.
As a side-bar, in the refurbish I repaired, replaced, refabricated or restored many items on the boat including: int/ext hand holds, interior finish, electrical, engine fuel and water lines, PSS shaft seal system, re-cored around chainplate area, windward sheeting as mentioned in earlier correspondence, fabriated new toe rails out of Starboard plastic, complete bottom job and new gel to name a few. Any questions or suggestions on material used, etc. just let me know.
Two questions, what is the hull number of your boat and have you joined the class association? I'm fairly new to sailing and very new to J-30's but I have found a lot of support and info with other members of the J-30 Class Assoc. It's worth belonging to the organization.
Steve Sullivan
Temptation, #311