Toilet to holding tank hose

[PaulRainbow]

Yes, but does depend on the current set-up. Mine had a Jabsco pump that was a combined seawater pump and macerator pump and had 3 connections - sea water in, sea water out, discharge out. I replaced this with the pump linked above that just has discharge out. It is considerably quieter than the combined pump, but by no means quiet!

You can just link the inlet and outlet for the seawater pump, no need to change the whole pump. One of mine is like that, but as you say, it's damn noisy.

 

[jfm]

Hi
The hose from the Jabsco electric toilet to the black water holding tank needs replacing. The only problem is it is completely inaccessible….probably installed before they lowered the liner onto the hull…it’s about two or three meters long….the only possible solution I can think of is to attach either a new hose (or guide wire) to the existing hose where it joins the tank and pull it through from the toilet end (or vice versa)…
My question: Is it a straight pull ? Or does the hose go in loops…or through valves or filters etc etc etc
This is a Swift Trawler 34 with a single sea water flushed toilet

Your pipe might go straight from toilet to black tank, but if you have a direct-overboard discharge selector valve then it will go via that. Only you can tell us that.

Will likely be a slightly curved run The hose might be held by a few zip ties along the way and you will need enough brute force to snap them. Perhaps jubilee clip a T to the end you are pulling, to get some grip and allow you to put a bar through the T to get even more grip..

It's only 25mm hose in your case so should be ok to pull out with brute force. Attach the new pipe with straight connector and put tape over the jubilee clips to help them get past obstacles, and the new pipe should then follow the route of the old. Do it a foot at a time, with much brute force and swearing. Smother the new pipe in silicone grease or soap, a foot at a time, to help it slide past obstacles


The Italian Eurocord hose linked above is excellent. I don't agree that butyl line pipe is more flexible than the white pvc hose, but at 25mm diameter it's all quite flexible anyway. Only at the 38mm size does it get really stiff.

 

[Seastoke]

So the original sea water pump and filter are now redundant?

U could have a 3 way valve,then if fresh water failed go back to sea water.

 

[wonkywinch]

I replaced the hose from pan Jabsco to black tank inlet on my 2016 Beneteau Oceanis. When working on it, first I found the 25mm toilet outlet then increased to 38mm by way of a hidden non return valve (another joker valve) prior to the riser to the black tank.

The tank is about 60cm tall and the hose ran up the back of the tank and I found three tie wraps, top, centre and bottom of the tank. The centre one was a pig to get to and involved the purchase of an endoscope camera and fixing a hacksaw blade to a piece of wood to enable me to snip the centre tie wrap off.

 

[Bouba]

Your pipe might go straight from toilet to black tank, but if you have a direct-overboard discharge selector valve then it will go via that. Only you can tell us that.

Will likely be a slightly curved run The hose might be held by a few zip ties along the way and you will need enough brute force to snap them. Perhaps jubilee clip a T to the end you are pulling, to get some grip and allow you to put a bar through the T to get even more grip..

It's only 25mm hose in your case so should be ok to pull out with brute force. Attach the new pipe with straight connector and put tape over the jubilee clips to help them get past obstacles, and the new pipe should then follow the route of the old. Do it a foot at a time, with much brute force and swearing. Smother the new pipe in silicone grease or soap, a foot at a time, to help it slide past obstacles

I don't agree that butyl line pipe is more flexible than the white pvc hose, but at 25mm diameter its all quite flexible anyway. Only at the 38mm size does it get really stiff.

Thanks for that! Zip ties are the last thing I thought of but bloody obvious now that you have said it
I think that all modern motorboats, by law, no longer have a discharge option

 

[Bouba]

I replaced the hose from pan Jabsco to black tank inlet on my 2016 Beneteau Oceanis. When working on it, first I found the 25mm toilet outlet then increased to 38mm by way of a hidden non return valve (another joker valve) prior to the riser to the black tank.

The tank is about 60cm tall and the hose ran up the back of the tank and I found three tie wraps, top, centre and bottom of the tank. The centre one was a pig to get to and involved the purchase of an endoscope camera and fixing a hacksaw blade to a piece of wood to enable me to snip the centre tie wrap off.

This is probably true of my boat since it is also a Beneteau
The connection to the tank should tell me if the pipe had increased in size !..,,bloody boat builders

 

[jfm]

Thanks for that! Zip ties are the last thing I thought of but bloody obvious now that you have said it
I think that all modern motorboats, by law, no longer have a discharge option

That's news to me. My new boat has a direct-to-sea option (valve).

 

[Bouba]

That's news to me. My new boat has a direct-to-sea option (valve).

I am sure I read it somewhere….perhaps your boat is just an entirely different category

 

[Seastoke]

I am sure I read it somewhere….perhaps your boat is just an entirely different category

It’s a small Island in the Med.

 

[mil1194]

It’s a small Island in the Med.

Not at the moment it isn’t.

 

[Bouba]

Ok….if it’s held up by cable ties….does that mean that when I install the new pipe without cable ties…it will sag and then collect sewage in it permanently?

 

[mil1194]

Ok….if it’s held up by cable ties….does that mean that when I install the new pipe without cable ties…it will sag and then collect sewage in it permanently?

Can you have a look in the gap with an endoscope or suchlike?

 

[Bouba]

Can you have a look in the gap with an endoscope or suchlike?

I don’t know yet….it won’t be until I access the tank…and I won’t be home until tomorrow evening…so sometime this week because I have a dentist appointment on Thursday

 

[mil1194]

I don’t know yet….it won’t be until I access the tank…and I won’t be home until tomorrow evening…so sometime this week because I have a dentist appointment on Thursday

It might ‘fall naturally’ with any potential clips just there for tidyness but I guess no-one will know without looking.

 

[jfm]

Ok….if it’s held up by cable ties….does that mean that when I install the new pipe without cable ties…it will sag and then collect sewage in it permanently?

No-one can possibly answer questions like this from their armchair. you gotta figure it out. Fortunately it's more likely to be held down than up.

 

[Seastoke]

You can move stuff out of the way, with it being a BEN dytoy.

 

[benjenbav]

User handbook contains some potentially useful drawings @ pp45-50.

https://data2.manualslib.com/pdf7/2..._trawler.pdf?afedd9381fafa6faadc0dd3c16118771

 

[kashurst]

Thank you!!!…that has eased my mind and now the job is a possibility

I am looking forward to news of great success!
I will be doing similar over the winter so all tips gratefully received.
P.S. wear a fask mask when messing with used sewage pipes etc. Don't ask how I learnt this.

 

[Boathook]

@Bouba buy quite a few of us airline tickets to travel to your boat plus 5☆ accommodation and we will come and have a look and give advise.

 

[Bouba]

@Bouba buy quite a few of us airline tickets to travel to your boat plus 5☆ accommodation and we will come and have a look and give advise.

Bring your own rubber gloves