Cruisers Forum
 


Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 19-06-2021, 06:16   #1
Registered User

Join Date: Aug 2018
Boat: Allied Princess 36 MKII
Posts: 489
Holding Tank filling very fast ??

We just installed a new Jabsco Twist-Lock toilet. When selector is set to drain bowl, each upstroke of the handle removes water from the bowl as expected. When selector is set to fill, the downstroke seems to add water to the bowl, but the reset stroke is still removing water from the bowl. Visually it appears that about 75% of the water added by each intake stroke is removed when handle is cycled to intake more water. Is this normal operation? Our only experience previous was with a much older Jabsco which allowed water to be filled to desired level, if water was removed on reset stroke, it was not this noticeable.
The end result is each stroke when set to *fill* bowl is sending water to the holding tank and it filled unreasonably fast, less than 2 full days.
Any ideas would be appreciated.
SV Adeline
S/V Adeline is offline   Reply With Quote
Old 19-06-2021, 06:48   #2
Registered User
 
Sailmonkey's Avatar

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 9,485
Holding Tank filling very fast ??

The selector isnít fill and drain, itís wet flush and dry flush.

The selector simply closes the incoming seawater. Has nothing to do with the bottom of the piston that pumps the waste.
Sailmonkey is offline   Reply With Quote
Old 19-06-2021, 07:47   #3
Writing Full-Time Since 2014
 
thinwater's Avatar

Join Date: Nov 2008
Location: Deale, MD
Boat: PDQ Altair, 32/34
Posts: 8,691
Re: Holding Tank filling very fast ??

^^ This. The flush rate is not changed.


How big is the tank and how many uses? Also, was the tank fully empty (blockages may prevent full draining)? If so, clean it out by blasting water in the fill and them pumping back a number of times.
__________________
Gear Testing--Engineering--Sailing
https://sail-delmarva.blogspot.com/
thinwater is offline   Reply With Quote
Old 19-06-2021, 07:52   #4
Registered User

Join Date: Aug 2018
Boat: Allied Princess 36 MKII
Posts: 489
Re: Holding Tank filling very fast ??

Quote:
Originally Posted by Sailmonkey View Post
The selector isnít fill and drain, itís wet flush and dry flush.

The selector simply closes the incoming seawater. Has nothing to do with the bottom of the piston that pumps the waste.
Thank you for the response. You are of course correct, but I am at a loss as to why our previous Jabsco (ancient and in a different boat) allowed us to raise the water level in the bowl and this one does not. Do all manual toilets work in this same manner? At sea it would not be an issue but inside the closed head zone it presents a major problem. Pumping out every two days is not practical.
S/V Adeline is offline   Reply With Quote
Old 19-06-2021, 08:03   #5
Registered User

Join Date: Aug 2018
Boat: Allied Princess 36 MKII
Posts: 489
Re: Holding Tank filling very fast ??

Quote:
Originally Posted by thinwater View Post
^^ This. The flush rate is not changed.


How big is the tank and how many uses? Also, was the tank fully empty (blockages may prevent full draining)? If so, clean it out by blasting water in the fill and them pumping back a number of times.
Tank was emptied Tuesday morning, visually verified. Following basic directions, add water to bowl before use(for solids), clear bowl after any use. Two adults one child, no excessive use or pumping. Maybe it's just a learning curve but we will definitely monitor usage more closely. 30 gal holding tank, but a drip occurs at 25+/- gal (it's on top of the priority *to do* list) Sizing for larger replacement tank but that is just more weight in the bow...
S/V Adeline is offline   Reply With Quote
Old 19-06-2021, 08:34   #6
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 2,755
Re: Holding Tank filling very fast ??

If you're always flushing in the "wet" or "fill" mode, you're bringing water in with every pump. The average adult uses the the toilet 5x/24 hrs, so on average, always flushing in the wet mode puts about 3 gal/person/day into the tank. That means 2 adults and a child are putting about 8 gal/day into the tank.

The solution: learn to flush in the "dry" mode. You toilet isn't designed to bring water in and hold it in the bowl, so use a cup from the sink to add water to the bowl ahead of solids. For urine only, just a couple of pumps in the wet mode, switch to dry to pump bowl contents to the tank, then back to wet for a couple of pumps to rinse behind the flush.

That's not gonna extend your time to between pumpouts to a week, but it should give you a couple more days.

_peggie
__________________
© 2022 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Old 19-06-2021, 09:04   #7
Registered User

Join Date: Aug 2018
Boat: Allied Princess 36 MKII
Posts: 489
Re: Holding Tank filling very fast ??

Thinwater, Peggy, thank you both for the replies. While we are at the marina, the head has been designated *emergency use only* as it's only 100 yards to the facilities and walking is such good exercise!! We will monitor usage closely and learn the most efficient ways to use our head with the least amount of water as practical. I can only assume relationship to waterline and possibly plumbing could account for our previous vessel's head being able to *fill* to a more adequate level for solids.
S/V Adeline is offline   Reply With Quote
Old 19-06-2021, 09:06   #8
Registered User
 
Sailmonkey's Avatar

Join Date: Sep 2009
Location: Houston
Boat: '76 Allied Seawind II, 32'
Posts: 9,485
Re: Holding Tank filling very fast ??

Quote:
Originally Posted by S/V Adeline View Post
Thank you for the response. You are of course correct, but I am at a loss as to why our previous Jabsco (ancient and in a different boat) allowed us to raise the water level in the bowl and this one does not. Do all manual toilets work in this same manner? At sea it would not be an issue but inside the closed head zone it presents a major problem. Pumping out every two days is not practical.


They all work this way.
Sailmonkey is offline   Reply With Quote
Old 19-06-2021, 11:09   #9
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 2,755
Re: Holding Tank filling very fast ??

If the discharge line on your previous toilet went straight up to a loop immediately after the toilet, that would allow water to stand in the bowl.

You could replumb your current toilet dsicharge that way...in fact it should be if you're plumbed to flush overboard or the tank...you'd just have to put the y-valve after the loop. It has a couple of advantages: 1. you only have to pump enough times to move the bowl contents over the top of the loop...gravity gets it the rest of the way to the tank (a solution when the tank is further from the toilet than it should be and/or it's a long gradual uphill run to the tank. 2. it conserves flush water, increasing the number of flushes a tank can hold by as much as 50%.

And btw...there should also be a vented loop in the toilet INTAKE...see Figure 1 on page 3 of the owners manual for correct location of both loops.

Jabsco Manual Twist & Lock owners manual



--Peggie
__________________
© 2022 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Old 19-06-2021, 12:18   #10
Registered User

Join Date: Feb 2019
Location: Point Richmond, CA
Boat: Hunter 46
Posts: 776
Re: Holding Tank filling very fast ??

Consider replacing holding tank with a larger one?
sail sfbay is offline   Reply With Quote
Old 19-06-2021, 12:40   #11
Registered User

Join Date: Aug 2018
Boat: Allied Princess 36 MKII
Posts: 489
Re: Holding Tank filling very fast ??

Peggie, she came to us plumbed with a loop before the y-valve in the discharge line, no loop in intake.

sfbay, since I have to replace the holding tank I am looking into a larger one
S/V Adeline is offline   Reply With Quote
Old 19-06-2021, 18:01   #12
Marine Service Provider
 
peghall's Avatar

Join Date: Feb 2011
Posts: 2,755
Re: Holding Tank filling very fast ??

Quote:
Originally Posted by S/V Adeline View Post
Peggie, she came to us plumbed with a loop before the y-valve in the discharge line, no loop in intake.
A vented loop in the intake as shown in that drawing is NEEDED on every toilet installed at or below the waterline. Without it, water outside the boat can flood and overflow the toilet if the inlet thru-hull is open and the toilet is left in the wet mode. That has sunk many a boat in its slip.

[/QUOTE]sfbay, since I have to replace the holding tank I am looking into a larger one[/QUOTE]

Ronco Plastics Ronco Plastics Home Page Ronco Plastics marine Tank drawings is your best source for a tank. They make TOP quality thick-walled water and waste tanks for a very reasonable price and have more than 400 shapes and sizes, over 100 of which are non-rectangular, and they install fittings in the sizes and locations specified by the customer when they make the tank. There are retailers who sell Ronco tanks, but Ronco sells direct for a much lower price...and they're great to work with.

When looking at drawings it's important to know that there is no top or bottom until the fittings go in, and YOU decide where they go. So rotate, flip in any orientation to find the tank that fit your space.

--Peggie
__________________
© 2022 Peggie Hall
Specializing in marine sanitation since '87.
Author "The NEW Get Rid of Boat Odors"
peghall is offline   Reply With Quote
Old 20-06-2021, 02:33   #13
Registered User
 
anacapaisland42's Avatar

Join Date: Aug 2009
Location: Ontario, Canada
Boat: Challenger 32 1974
Posts: 521
Images: 3
Re: Holding Tank filling very fast ??

our 4 year old daughter filled tank in one weekend! !!!!!!!!!!!!!!!!!!!!!!!!!


Two adults one child, no excessive use or pumping.
anacapaisland42 is offline   Reply With Quote
Old 20-06-2021, 03:35   #14
Registered User

Join Date: Sep 2008
Location: Chesapeake Bay
Boat: Hunnter Legend 37.5
Posts: 902
Re: Holding Tank filling very fast ??

I have the same toilet. Here is what I do. Dry flushing for all urine. I rinse the bowl at the end of each day with fresh water, maybe 12 oz, to get rid of the urine smell and leave just enough water to cover the bowl orifice to. No TP in the head, period. This eliminated the need to "rinse" the TP down.

For feces, fill bowl about 1/2 way with water prior to defecating. Makes it MUCH easier to flush, and again....no TP! As a side note, I have a wet head, so I use fresh water (shower spigot is in the sink fixture). Keeps the sulfur smell at zero.

Also, as captain, I relieve myself topsides whenever feasible. Daytime in a marina....not so much. Nighttime.....yes (me and the air conditioner discharge from my all of my neighbors sounds the same ). At anchor and while sailing (clipped in, of course), frequently.

I sail with....Admiral, two daughters, and my son. Doing all of thevabov gets me 5 to 7 days. If it's just the admiral and I....one week between pump outs easy. Oh....20 gal holding tank, 1990 Hunter Legend 37.5 in the Chesapeake bay.
bensolomon is offline   Reply With Quote
Old 20-06-2021, 03:40   #15
Registered User

Join Date: Sep 2008
Location: Chesapeake Bay
Boat: Hunnter Legend 37.5
Posts: 902
Re: Holding Tank filling very fast ??

I should have added that my family has been very comfortable, at least in warmer climates and in the summers, to go for a swim and urinate while swimming reducing the volume deposited in the holding tank.

I suspect if you eliminate the toilet paper from the head, your fill rate will drop precipitously.
bensolomon is offline   Reply With Quote
Reply

Tags
holding tank

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Very small water-maker oder Big one for very fast refilling? Ibetitsthisway Seamanship & Boat Handling 98 21-10-2019 12:28
Holding tank filling up daily? sailingokanagan Plumbing Systems and Fixtures 5 11-09-2018 13:02
Holding Tank Filling Up edbulmer Plumbing Systems and Fixtures 32 19-06-2015 08:34
Holding Tank Holding Tank Leaff Construction, Maintenance & Refit 17 01-07-2012 05:12
One Very, Very, Very Lucky Sailor nigel1 Flotsam & Sailing Miscellany 13 09-11-2011 08:04

Advertise Here


All times are GMT -7. The time now is 20:50.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2022, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.