Replacement drain hose.

[Ed Schenck]

Today I had to cut my galley sink hose to remove it. It is the black hose with the wire in it, really heavy duty. We discussed replacing this once before but I forget the outcome. Is it necessary that it be so heavy? I think the ID is two inches. It simply would not come off the thru-hull. The thru-hull is a very large gate valve. It looks like new but is probably original(1979). I suppose I should replace with a seacock but one that large would be very expensive. Do they make a straight thread ball valve that could handle a two inch hose?

 

[Andy]

Hose size

Hey Ed, how are you? Just FYI, on the lil' Hunters that I know of (29.5 and 340), the sink drain does have a seacock and smaller hose. I think it is 3/4"ID. Drains slower than the 2" mother of all hoses that you have, but it does drain.PS-We had a two great races on Beaver today. Wish you could have joined us.

 

[Ed Schenck]

No can do.

Actually I guess I could do that with a reducer. Keep the big thru-hull but use a smaller ball valve I mean. To use a real seacock I would have to change out the thru-hull.I'll catch you on the e-mail side Andy. With my new address: h37skipper@sbcglobal.net

 

[David]

Cut tapered threads

on the thru-hulls to allow for a proper fit to NPT ball valves. This is what I did to install new thru-hulls with ball valves on my ’82 H-33. The longer thru-hulls were needed to provide enough length for threading. On this boat the two largest thru-hulls are 1 1/2”, waste and galley.Good Luck Ed

 

[Ed Schenck]

Correct David, 1.5 ID.

Just measured the hose, 1.5" ID and 2." OD. But sure do not want to replace the thru-hull. I see the NPT valves in the WM catalog. But I thought someone had mentioned seeing/buying ball valves with NPS threads. The WM seacock is $98. But with the last seacock I installed(engine water) the thru-hull was too long. Fortunately I was installing the thru-hull also and was able to cut it before it was in the boat. Maybe just stay with the gate valve?This all started because I had to cut the drain hose out. That was so I could get back under the sink to install a filter and new water pump.

 

[David]

After removing the gate valve,

can you cut the thru hulls in place to the correct length to fit a seacock? When I did valve replacement, one valve was seized to its thru hull so I used a sawzall and cut it off, then removed the thru hull. “Maybe just stay with the gate valve?”, gate valves can seize/brake open or closed. I found this to be the case with one on my boat and therefore removed all gate valves. Regards,SV Akula

 

[Ed Schenck]

By removing the cabinetry. . .

I could possibly shorten it. And that might just be the way to go. The only way I will ever have a decent icebox is to rebuild from scratch. So maybe I will leave it alone until I tackle that project. Being in fresh water makes a huge difference in plumbing. I wish I had a picture, this gate valve looks like it just came off the shelf. Thanks for the dialog David.

 

[Seattle Scott]

Ed, I had same set up

on my '85 37C. I found a Marlon or similar plastic ball valve that was cheaper than bronze. I guess once the size gets big enough, bronze will cost more than marlon. Can't remember the brand.

 

[Ed Schenck]

NPS vs. NPT

I have been watching the debate on this thread issue for eight years now. There are still those who feel that tapered threads(NPT) on a thru-hull(straight NPS) are not a problem. Others write that it is a recipe for disaster.I wonder if Marelon might be better because the thru-hull would cut a few new threads? I only have three valves - engine, head, and galley(I should install one for the vanity which goes out through the bootstripe).I have a real seacock on the engine and had to replace the thru-hull(1/2" to 3/4") to do that. The head is a ball-valve, yep NPT to NPS. Maybe I should ante up and put seacocks on the head and galley.