Fresh water tanks

[AADIVER]

My '83 has two fresh water tanks, one under the V berth, the other under the starboard settee. May I assume the V berth tank is for the head (sink and shower), the starboard for the galley sink? Or are they both connected so when the V tank empties the starboard kicks in? Or...?

 

[gpd955]

Don't know if it was standard but mine were both connected. I was able to fill them both from the forward fill and use the aft one to vent the tanks as they filled.

 

[shipwreck66]

Where is the Blackwater tank on your boat?

 

[Stu Jackson]

Unless you have two freshwater pumps, don't they have to be connected?

 

[AADIVER]

The boat has a pressure system. When I turn on that switch and the DC switch at the starboard control panel both the galley sink and head sink turn on like a regular on/off faucets. There are two water fill inlets on the starboard deck. The forward one fills the forward tank and the aft one fills the aft tank. Only the aft tank has the vent hose.

 

[Twice Around]

I think the standard Catalina set up was the forward tank & the stbd settee tank were plumbed together. I only have the single 17 gal water tank to stbd & the boat did not originally have pressure water, although a pump was added later..I plan to add another tank in the near future.

The blackwater tank is usually the 17 gal tank under the port settee.

Here is the diagram out of the Catalina parts catalog of what I suspect to be your layout.

It came from here --> http://www.catalina30.com/TechLib/PartsManual/Systems.pdf

 

[AADIVER]

Thanks, Shawn, looks like I'm pages 54 to 57 and my black water tank set up is page 58.
Are these just for your '77 or do they include up to '83? My hull # is 2969. Looks like Catalina built 2,458 thirties in five years.

 

[Twice Around]

Yeah..in the early 80's they were cranking out roughly 1.35 boats per DAY if they were working 7 days a week! At 5 days per week it is 1.94 boats per day.

I do not know the years that catalog was valid. My boat is set up more like Page 51, and it did not come with a holding tank.

I completely ripped out the non-functioning 80's retrofit holding tank crap that was in the boat and started from scratch. I had the 20+ gallon tank built, installed it in the bow and made it my black water tank.

edit - Here is the text from the website -
[FONT=Arial, Arial, Helvetica]Circa 1980 Parts Manual
This parts manual should cover most Mark I C30s built 1974-85. The rigging and gear illustrations are helpful for any upgrades. Hopefully we will obtain similar document for the Mark II and III later models. Contributions gladly accepted!
These are large PDF files so be prepared to wait awhile if you attempt to download files. Personal thanks go to Dan Wilcox for scanning this document. BlownAway, Carolina Beach, NC


[/FONT]

 

[jrowan]

Shawn, I think your link to the C 30 parts manual is dead - but I think there's a working link on the C-30 website.

You could do the overly simplified & lame plumbing removal that my P.O. did. He disconnected all the inlet supply hose lines leading from the deck fill plates to the tanks, presumably because they were worn & leaking. Now I have to fill the water tanks with a hose through the companionway - classy. Not to mention that if I haden't verified that the lines were gone & had tried to fill the tanks from the fill plates on deck, I could have flooded the cabin with a lot of water. Not smart. My forward tank is also completely disconnected. I was planning ot plumb it to the head, & use the setee tank for the galley as dedicated tanks, but now I realize that the pressure pump won't work unless it is re-plumbed to connect the two tanks together. Looking forward to snaking a new water line between the cabin sole & hull!

 

[shipwreck66]

Apparently Rube Goldberg worked for Catalina in the 80's, but hey it works. Avalon I appreciate your predicament, first time I filled my tank I wondered why it seemed so big, then I noticed the bilge pump had kicked in. What I still haven't heard commented on is why Catalina installed my black tank vent at the bottom side of the anchor locker, always covered by wet rope. I had assumed one had never been installed and only found it by accident one day when anchor was out and I happened to pull some debris from the bottom of the locker.

 

[Twice Around]

jrowan, sorry if the link doesn't work...it works when I click on it???

http://www.catalina30.com gets you to the site and it is over in the "technical library" - by today's standards the site is getting pretty archaic, but if you can manage to navigate thru it, there is lots of stuff we as new owners are experiencing now that's already been tackled.

I've done lots of cruising & filling the tanks via the "inspection ports'..no worries! You should have seen the time I drug the pump-out hose down the forward hatch (not on my C-30, though!) :naughty: - that was a borrowed boat.

 

[adirondackbob]

AADIVER, the set-up on my 1989 Mk II is just as you describe yours: "There are two water fill inlets on the starboard deck. The forward one fills the forward tank and the aft one fills the aft tank. Only the aft tank has the vent hose." The two tanks are plumbed together, and they each have a valve at the outlet. If you leave both valves open, they will draw down as if they are one tank. However, you can close the valve on either tank to draw water from the other.

Bob