3870 water tanks

[boatworkfl]

Just started to build my molds for the 2 piece water tank for my 3870.
I am using plastic laminated shelving, I will make it in two separate tanks connected with fittings and hoses.
Iso resin with a vinyl ester liner and gel coat the exterior.
It has been too cold here in FL to gel coat the 2 sets of tunnels I have sold.
36 below at international. Falls, MN and the cold has been drifting down the east coast.
I thought Alaska was cold.

[boatworkfl]

I would like to add I am not interested in selling water tanks,

[MacPhid]

Pat,

If you could post pictures of the build though, I'm sure all 38 owners would appreciate it

James

[boatworkfl]

Pat,

If you could post pictures of the build though, I'm sure all 38 owners would appreciate it

James

Will do, I just started building the mold, but we have near freezing weather here near Gainesville, FL.
I am completely shut down, waiting for warmer weather to spray gel coat on a paid for pair of tunnels.
Looks like at least a week or more.
The tank mold is easy, I will post the info and photos as well as the dimensions of the 2 pieces, 2 so you do not need to tear up the port stateroom floor on a 3870.
Reason I do not want to sell water tanks is the 72" length and shipping. It takes 2 tanks

[yachtman]

Yeah I need new water tank in my Avanti and shipping is nearly as much as the tank. It's 72 inches also. With shipping it's near the $800 mark from some vendors.

Coast marine will make a new original aluminum for $800 and I could go pick it up. So much to decide.

[boatworkfl]

What are the dimensions of your tank, and can you install it in one piece?
It is the length and the width that adds up for shipping.

[yachtman]

72 x 27 x 7 about a 50 gallon tank. I had to cut the floor away to get to it. Tomorrow going to remove it. It's been in real cold here so I haven t worked on it but tomorrow is going to be in the low 30's I might go out and remove it. I would have had it out by now if the factory hadn't tabbed it in with fiberglass.

[yachtman]

[ctbarbarian]

I have a 3818 1988 Bayliner that I want to replace water and septic tank. I would very much like pics and info on how it goes.
I have a lot of floor to tear out and tubing to replace too.

[Pcpete]

CT, I also have a 1988 3818, in all likelihood your holding tank is just fine. However, replacing your black water hoses may (probably) need to be replaced and would be the cause of any odors. I used as much ch schedule 40 pvc pipe as I could, as recommended by all knowledge marine sanitation folks, and high quality sanitary hose. I also eliminated the Y valve as it is illegal to pump overboard in the US.
Replacing the domestic water tank is on my to do list.

[ctbarbarian]

PCpete, I'm new to this boat, have you put davits on your 3818 yet?
I'm trying to figure out how to carry a 10ft Caribe with a 9.9yamaha.

[capnken]

when I installed bow thruster in my 45, I was faced with needing to fab a new 80 gal water tank that was the smaller secondary tank on the 45, located in the floor of master cabin. Found a company in Bellingham that fabricates polyethylene tanks and had a new tank made to dimensions. (old tank was aluminum). I would recommend this option as the material is more durable, and not prone to corrosion or cracking.

[boatworkfl]

I have a 3818 1988 Bayliner that I want to replace water and septic tank. I would very much like pics and info on how it goes.
I have a lot of floor to tear out and tubing to replace too.

I am using Melmine shelving for my molds, I am making 2 tanks 14" wide and 10" tall x 72" long.
It take 1 15 /4" wide and 2 11 3/4 wide plus the ends, I cut the ends from the 15 3/4 as I bough an 8 ft long board.
I use partall past wax and then spray it over with PVA.
2 tanks and I do not need to cut out the floor in the port stateroom or the wall an my 3870.
I will install a balance tube and vents as well as the fill and I purchased a tank level monitor for one tank, I just need to double the water level.
I am using iso resin and will coat the inside with vinyl ester, straight iso resin will work
Then it needs to be heated for at-least 8 hours with-out the top on, to remove fumes then laminate the pre made top on, don't remember the temp right now.
I will post photo's but the weather here in Florida has me in a holding pattern, it is cold.

[Pcpete]

CT, PM sent.

[boatworkfl]

I conducted more research on what to use on the inside of the water tank.
ISO gel coat is what the large professional companies use, so I will also use ISO gel coat in and out outside does not need to be thick, but with wax it will cure the gel coat.