2006 23 Gulfstream Jabsco Head / Holding Tank Hose Replacement

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Bmarlin22

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Today I replaced my original Jabsco hand pump assembly and macerator pump on the top of the holding tank under the deck access in front of the passenger seat. Everything was replaced and all was going well until I tested the system. While flushing the head, water started bleeding out of the discharge hose. It became obvious that all of the hoses are dry rotted. My new to me boat is 20 years old and hasn’t been abused but also hasn’t been maintained that well. So……the question is has anyone successfully changed all of the MSD hoses on a 2006+ Gulfstream? I have the layout of the system. There is a hard U turn when the hose leaves the head and then it travels athwartship to the holding tank through an access tube to the holding tank on the port side. It doesn’t seem like an easy (or possible) task.

Also comes the question about the holding tanks integrity. I am going to fill it with fresh water and see if it will hold it for a few days. If it does I am going to assume it is sound. If that is the case and I can successfully replace ALL of the hoses, the system should be completely rebuilt and good to go?

My main concern is the hose replacement. If anyone has any experience I would appreciate some advice. I am also weighing the option of just taking the ceramic bowl out, securing the holding tank and installing a porta poti. I’m going to give Grady a call next week to see if they have any advice also. Thank you in advance for any advice.
 
I would fit the holding tank. Portable is painful to take care of. Can’t imagine the 2006 hose already shot. I would check the connections and make sure they are tight. You can use the silicone sanitation hose for hard to reach and bend around the corners.
 
It's difficult to work on the holding tank on my 268 Islander. Not familiar with your boat but given it's smaller it doesn't get easier.

These rubber hoses are very hard to work with in confined spaces where most work must be done with one hand. The macerator project I did I used silicone hose. Expensive but easy to work with. But you have to be careful with bends that it doesn't collapse. You can use a combination of black rubber and silicone with connectors and hose clamps.

Macerator 1.jpg Macerator 2.jpeg
 
A porta-potti is nice becasue it is so simple to use/take care of and it's pretty much dirty simple. Not a bad idea you have there.

Hose replacement is pertty much the same on all boats - a royal PIA. They usually "just barely" fit through the drilled holed but since they sometiems (especially the older, black rubber style) swell a bit over time, they now fit really tight. Cut the hose (BUT, you want to keep in mind that you want use at least some of the old hose to pull the new one thru by barbing/sscrewing or stictching together). Once you get the hose out of the hole you can enlarge it if needed.

Don't be afraid to cut new access holes where needed (or maybe a speaker/etc can be removed for access). For example, the deck pump-out fitting.

For new stuff... look to the white vinyl, reinforced stuff.
 
Thank you for all the replies. I was able to track the bad hose from the toilet to the holding tank. It looks like it could be replaced with some help and patience. You can see in the pic where it is dry rotted as it enters the tank. The tank was clean so I filled and emptied it a couple times, without any issues. There are no other obvious bad hoses that I can see. I filled the tank with fresh water and am going to see if it stays full for a couple days to make sure it doesn’t have any leaks. So I guess plan A is to replace the bad hose from the toilet to the holding tank and pray for the best. It does appear that all of the hoses were designed to be replaced. Not much room, but maybe just enough accessibility. I am looking at the Raritan Saniflex Hose. Gets good reviews and supposed to be flexible. Again thanks for the replies-will update.
 

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