Flow rate for fresh water toilet

[DavidJ]

I want to replace my noisy Jabsco electric conversion with a quite flush and the only one which will fit my installation on a Sealine S37 is the Jabco Quiet Flush (I would have preferred a Tecma). The Jabsco data sheet asks for a minimum 13.5 LPM flow. I've measured the flow from my taps and it's only 9 LPM. Is this a show stopper for me? I don't really want to throw a lot of money at this.

 

[jfm]

I want to replace my noisy Jabsco electric conversion with a quite flush and the only one which will fit my installation on a Sealine S37 is the Jabco Quiet Flush (I would have preferred a Tecma). The Jabsco data sheet asks for a minimum 13.5 LPM flow. I've measured the flow from my taps and it's only 9 LPM. Is this a show stopper for me? I don't really want to throw a lot of money at this.

Probably not a show stopper. The flow from your tap is throttled by the tap itself: it might well be that the pump is 13.5lpm unthrottled

The consequences of being say 10 not 13.5 is that the jet of water into the flush bowl might not reach under the rim all the way around. The jets of water might droop down into the centre of the bowl before getting to the 6 o'clock position right under the rim. Now if you are a very untidy pee-er and manage to pee right under the rim at 6 oclock this lack of flushwater could cause the loo to start to smell of pee, which is easily fixed by not being such a careless pee-er or cleaning the bog from time to time, both of which are easily achieved and no doubt are already! . In other words, I'm saying it is not a problem

I'd warn you that the jabsco "quiet" flush is one of the most misrepresentative descriptions ever, but I appreciate that you are where you are and the tecma wont fit. Good luck

 

[DavidJ]

Thanks jfm for your wonderfully descriptive reply and your comments on noise. I've not heard the Jabsco "Quiet Flush" in action so I'm considering whether the project is worth it now.

The Tecma definitely won't fit because I actually bought one, only to find a huge stringer right under the plinth (Aquafax very kindly gave a full refund on the Tecma)

I'm hoping someone will come along who had done the Jabsco "quiet flush" conversion. I'll just remind folk this is not the Jabsco electric "wake the marine" conversion from manual.

Thanks again, project on hold for the moment.

 

[Nick_H]

Have you looked at the Jabsco Lite Flush, its designed to fit the same mounting holes as a Jabsco manual, though its a bit taller. It is reasonably quiet, certainly compared to the deafening electric conversion it is. I don't know about water usage, though I can't see this being a problem for the reasons jfm states above.

http://www.mailspeedmarine.com/toilet-systems/jabsco/lite-flush-toilet.bhtml

 

[DavidJ]

Have you looked at the Jabsco Lite Flush, its designed to fit the same mounting holes as a Jabsco manual, though its a bit taller. It is reasonably quiet, certainly compared to the deafening electric conversion it is. I don't know about water usage, though I can't see this being a problem for the reasons jfm states above.

http://www.mailspeedmarine.com/toilet-systems/jabsco/lite-flush-toilet.bhtml

Thanks for that Nick, I hadn't seen that model and it looks good. I've had a look for any pdf downloads to give further info and can't find one yet but it looks like there is no "below the plinth" plumbing which is the main problem I have. The height unfortunately is the problem. I have quite a nice hinged moulded cover which covers the toilet which restricts my height to 330mm. Even with the toilet lid taken off the Lite Flush 373mm dimension is too much. I don't want to take the bathroom "look" away from standard.
Thanks for your thoughts though.

 

[peterandjeanette]

First time SWMBO heard our "quiet flush" she said :-

"Good job we didn't get a noisy one"

 

[DavidJ]

First time SWMBO heard our "quiet flush" she said :-

"Good job we didn't get a noisy one"

Love the quote, difficult to talk about noise but do you know how it compares to the Jabsco electric from manual conversion?

 

[Nick_H]

Thanks for that Nick, I hadn't seen that model and it looks good. I've had a look for any pdf downloads to give further info and can't find one yet but it looks like there is no "below the plinth" plumbing which is the main problem I have. The height unfortunately is the problem. I have quite a nice hinged moulded cover which covers the toilet which restricts my height to 330mm. Even with the toilet lid taken off the Lite Flush 373mm dimension is too much. I don't want to take the bathroom "look" away from standard.
Thanks for your thoughts though.

Yep, the Windy has a similar hinged cover, but it did fit with the toilet seat off, which I could live with.

 

[jimmy_the_builder]

Love the quote, difficult to talk about noise but do you know how it compares to the Jabsco electric from manual conversion?

I had the elec conversion on my previous Targa 37 - very noisy, as you know. I've got the quiet flush in my current Targa 40, and it's (subjectively) a bit quieter, but not much tbh. It's not worth the upgrade, imho.

Cheers
Jimmy

 

[jfm]

Love the quote, difficult to talk about noise but do you know how it compares to the Jabsco electric from manual conversion?

I have heard them both David. I had the conversion job on my first Sq58, and I had the "quiet flush" on my last Sq58 (which was a stock boat) and I got EssexBY to replace them with Tecma

The quiet flush is not as noisy as the conversion but it makes the same tone of motor/grinding. I'd say it is 3/4 of the noise, in an amateurish kind of way

Your 330 limit is quite restrictive, if you cannot hang any mechanism below due to the stringer. i honestly cannot think of the perfect product for you and you might have to go with the quiet flush, but here are some suggestions that are nicer and quieter than the quiet flush if you can fit them:

1. Low profile version of Dometic Masterflush. This is a macerating toilet like Tecma. 349mm high if you remove the lid and keep the seat. Nice looking machine, good brand, but is it too high? Details and dimensions

2. The ultra-low profile version of the Sealand Vacuflush. This is only 292mm high overall, but its 38mm discharge pipe has to come up thru the floor so it depends on the precise details of your stringer. dimensions here. These are quite nice loos; I had them on my first Sq58. There is a sweooosh noise for a second when the vacuum flushes followed by 15 seconds of the recoprocating mechanism of the diaphragm pump that replaces the vacuum, but they are much quieter than the quiet flush jabsco. T'other thing is that you have to find space in the bilge for the vacuum pump unit, which is as a rough guess from memory perhaps 300x300x500 kinda thing, so not that easy to position, maybe, depending on your boat. The more you can bury this part the quieter the system runs, though you need service access

There is a whole new range of loos now from Dometic, called rushflush. They are being fitted to the Sq78 that will be at LIBS2013 - I saw them at FL factory last week. They have no macerator pump and rely on squirting a jet of water at the turds to macerate them. sounds very unreliable to me, what with the risk of the spray going wrong way in your face (HLB - this could be the new exploding bog) and the risk the turd is too strong for the jet to macerate. But if it works then great. There isn't one as low as 330mm, at least not yet, so it's academic for your boat and I only mention it in passing

 

[DavidJ]

Thanks Jimmy, Nick and jfm
I've printed off the dimensions for the Dometic and will have a play (nice looking unit!). I also notice that their flow requirement is only 7.6 LPM, so well within my delivery capability (one problem solved!)
Thanks for all your contributions. Sounds like I would be disappointed with an investment into the Jabsco Quiet Flush but might go there if the electric conversion fails. Meanwhile if I can make the Dometic fit we might just have a solution.