Hunter 41 DS Fwd Head Sani Hose

[jamesrbrown999]

In the process of replacing all the sanitation hoses with Trident 102 on my Hunter 41 DS...

Anyone have any experience changing out the Fwd Head Sani hose? How do you disconnect the 1 1/2" hose from the 1" feed from the head, there are no access points. Wondering if you just connect the new hose to the old hose at the 'holding tank' & pull towards the Fwd Head???

Appreciate any suggestions. JB

 

[Don S/V ILLusion]

I’d be amazed if you can pull that out. Removing the deck plates might be easier.

 

[Ralph Johnstone]

from the 1" feed from the head,

1. Welcome to the site.

2. What head do you have that has a 1" dia. discharge ?

 

[jamesrbrown999]

Jabsco electric toilets installed at the factory . Both heads onboard have a 1" outlet, approx 2' of 1" sani hose loops, than a 1" to 1.5" adaptor connects to 1.5" sani hose to the holding tank.

 

[jamesrbrown999]

I’d be amazed if you can pull that out. Removing the deck plates might be easier.

Thanks I will investigate further... jb

 

[Ralph Johnstone]

Jabsco electric toilets installed at the factory . Both heads onboard have a 1" outlet, approx 2' of 1" sani hose loops, than a 1" to 1.5" adaptor connects to 1.5" sani hose to the holding tank.

Perhaps this is a question more suited to our resident head expert @Peggie Hall HeadMistress as to :

1. Why the head outlets are not the normal 1-1/2" dia. discharge as found on manual heads ?

OR

2. If the head contents have already been macerated by the electric pump, why the hoses don't remain at 1"dia. as they proceeds to the holding tank ?

 

[jamesrbrown999]

Perhaps this is a question more suited to our resident head expert @Peggie Hall HeadMistress as to :

1. Why the head outlets are not the normal 1-1/2" dia. discharge as found on manual heads ?

OR

2. If the head contents have already been macerated by the electric pump, why the hoses don't remain at 1"dia. as they proceeds to the holding tank ?

Hey Ralph,

Thx for your thoughtful comments…

Maybe the 1.5” hose is used in case either manual or macerated electric head is installed…. But does that cause problems???

Having the hose change from 1” to 1.5” partway would cause the flow to slow causing possible blockages, whereas using 1” all the way would keep the flow constant.

Other post have discussed just using 1”, interested to hear of the results… and installing would be a bit easier & cheaper.

Peggie: your 2 cents?

Jb

 

[Peggie Hall HeadMistress]

Perhaps this is a question more suited to our resident head expert @Peggie Hall HeadMistress as to :

1. Why the head outlets are not the normal 1-1/2" dia. discharge as found on manual heads ?

1.5" has always been the standard manual and electric toilet discharge size...so when holding tanks arrived, 1.5" became the standard size for inlet and outlet hose fittings. For decades Jabsco--who's always kinda "marched to their own drum"-- was the only toilet mfr who used 1" toilet discharge, which required all Jabsco toilet owners to use a 1"-1.5" adapter to connect to the tank. There doesn't seem to be any rhyme or reason to where owners choose to put the adapter, so while the best place for it is either immediately after the toilet or at the tank, it can be found almost anywhere in the toilet discharge line. Jabsco--and most other toilet mfrs too--now offer a toilet discharge fitting that can use either size hose.

OR

2. If the head contents have already been macerated by the electric pump, why the hoses don't remain at 1"dia. as they proceeds to the holding tank ?

They can. However, because the inlet fitting on all holding tanks except those made with custom sized fittings will be 1.5", an adapter will be needed to connect the hose to the tank. Which also explains why macerator pumps have 1.5" INLETs and 1" outlets. No reason for it, it's just how Jabsco thinks they need to be made, which means the discharge thru-hull must also be only 1" ...which can really complicate switching from a macerator pump to a manual or electric diaphragm pump, alll of which are 1.5" at both ends.

--Peggie

 

[jamesrbrown999]

Thx for your reply Peggie...

The reason I'm asking about using 1" all the way to the holding tank (albeit with a short 1.5" to connect to the tank)... is the hose from the 'fwd head' to the HT is 12-14', a lot more than your recommended 6-10' max in your book (which BTW I purchased 2 weeks ago).

Thinking having 30% more flow (throughout the journey) might be beneficial for such a long run... as you mentioned it is preferable to run the water a bit longer to 'clear the hose'... thus using 1" would also use less water to keep the hose clear.

Also ensuring that the sani hose is somewhat downhill to the holding tank is improbable, if not impossible given the hidden route... (what is the 1st rule of plumbing? - sh#t runs downhill, except on boats!!!)

Cheers, jb

 

[Ralph Johnstone]

sh#t runs downhill, except on boats!!!

The plumber's mantra .

 

[Peggie Hall HeadMistress]

12-14' is about double the distance that most marine toilets, manual or electric can move bowl contents without a lot of help from gravity. There is a work-around that can provide that help. Any toilet can LIFT bowl contents up to 4'...so aim your discharge fitting straight up and connect a discharge line long enough to be barely above the top of the tank, then down to the tank inlet fitting. No need to buy a loop...even Trident 101/102 can make a 180 if it's wide enough. This means your toilet will only have to pump long enough to move bowl contents over the top of the loop...gravity will get it the rest of the way. You can even conserve flush water by flushing in the dry mode (assuming your toilet has a dry mode...if you have a macerating electric toilet, there are flush panels that offer that choice), then switching to wet just to rinse the line behind the flush.

sh#t runs downhill, except on boats!!!

Nope...the laws of physics dictate that it has to run downhill even on boats...however marine toilets can PUSH it uphill.

--Peggie

 

[jamesrbrown999]

Successfully completed replacing all the sanitation hoses on our Hunter 41 DS with Trident 102 (white) hose... can already smell the difference!!!

The 'aft head (AH) to holding tank (HT)' hose has a low portion that is lower than the HT access, as Hunter built it (no way around this), so there will always be liquid in that 'low' area... gravity will not drain that portion. Thus replaced the 1.5" hose with 1.0" hose (to match the head output) with 6" of 1.5" hose to adapt to the HT inlet. This will require less water to clear the hose of 'head debris' to the tank, whereas the original 1.5" hose required 30% more water to do the same... so far, so good

All other hoses were replaced with the original sizes. Did not modify the 'fwd head (FH)' hose to 1.0" as this head is rarely used, the extra amount of flushing to clear will not be detrimental to the fresh water capacity & already had 1.5" hose on-hand (in the future when required will replace this hose with 1.0" to match the aft head configuration).

The vent hose according to the Hunter Owners Manual is supposedly 3/4"... but 5/8" was found to be installed.

FYI: for those who asked, the hose lengths are as follows...

- aft head to holding tank: 141" total (orig 105" of 1.5" + 36" of 1.0") changed to (135" of 1.0" + 6" of 1.5")
- fwd head to holding tank: 146" total (198" of 1.5" + 48" of 1.0")
- holding tank to macerator: 55" total (1.5")
- macerator to thru-hull: 28" total (1.0")
- holding tank to pump-out: 120" total (1.5")
- holding tank to vent: 120" total (5/8")

Thanks everyone for your assistance (especially Peggie)... I will update on any performance issues.

jb.

 

[jamesrbrown999]

Peggie, reading your book "Get Rid of Boat Odors", lots of good stuff in there!!! ...highly recommended.

RE: Page 70, you mentioned to NEVER use bleach for cleaning.

Can you further explain your thinking on this?

Thanks, Jim.

 

[Peggie Hall HeadMistress]

Bleach is corrosive and damaging to rubber and plastics (parts in pumps, hoses etc)... and it reacts negatively with other cleaning products...for example bleach and vinegar create chlorine gas...bleach + Ammonia create chloramine ...there are others you can find with google search. I don't make this stuff up, marine equipment mfrs warn against using bleach. It can be safely used to remove mold and mildew on hard surfaces, and to recommission fresh water systems using the instruction also included in my book (I didn't make those up either), but that's about all.

--Peggie

 

[Peggie Hall HeadMistress]

1. Why the head outlets are not the normal 1-1/2" dia. discharge as found on manual heads ?

You'll have to ask Jabsco...until recently they've been the only mfr who uses 1" discharge discharge on their toilets and macerator pumps. Other toilet mfrs recently began offering toilet discharge fittings that can accept either 1' or 1.5" hose. Raritan began doing that to accommodate owners who are upgrading from a Jabsco toilet. and have a 1" discharge hose they aren't replacing.

2. If the head contents have already been macerated by the electric pump, why the hoses don't remain at 1"dia. as they proceeds to the holding tank ?

It can, but you'll need a 1"-1.5" adapter to connect it to the holding tank because, unless you have a custom fitted tank, the inlet and discharge fitting will be 1.5" . You can put that adapter at either end.

--Peggie

 

[jamesrbrown999]

Successfully completed replacing all the sanitation hoses on our Hunter 41 DS with Trident 102 (white) hose... can already smell the difference!!!

The 'aft head (AH) to holding tank (HT)' hose has a low portion that is lower than the HT access, as Hunter built it (no way around this), so there will always be liquid in that 'low' area... gravity will not drain that portion. Thus replaced the 1.5" hose with 1.0" hose (to match the head output) with 6" of 1.5" hose to adapt to the HT inlet. This will require less water to clear the hose of 'head debris' to the tank, whereas the original 1.5" hose required 30% more water to do the same... so far, so good

All other hoses were replaced with the original sizes. Did not modify the 'fwd head (FH)' hose to 1.0" as this head is rarely used, the extra amount of flushing to clear will not be detrimental to the fresh water capacity & already had 1.5" hose on-hand (in the future when required will replace this hose with 1.0" to match the aft head configuration).

The vent hose according to the Hunter Owners Manual is supposedly 3/4"... but 5/8" was found to be installed.

FYI: for those who asked, the hose lengths are as follows...

- aft head to holding tank: 141" total (orig 105" of 1.5" + 36" of 1.0") changed to (135" of 1.0" + 6" of 1.5")
- fwd head to holding tank: 146" total (198" of 1.5" + 48" of 1.0")
- holding tank to macerator: 55" total (1.5")
- macerator to thru-hull: 28" total (1.0")
- holding tank to pump-out: 120" total (1.5")
- holding tank to vent: 120" total (5/8")

Thanks everyone for your assistance (especially Peggie)... I will update on any performance issues.

jb.

Correction:
- fwd head to holding tank: 146" total (198" of 1.5" + 48" of 1.0")
Should read: 246” total