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Small Cabin Forum / Off-Grid Living / Standard Toilet on Gravity Feed Fills Slowly
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paulz
Member
# Posted: 27 Mar 2016 12:17
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Just plumbed my bathroom. Standard toilet, water tank 25 ft. above. Lots of flow at the sink but the toilet takes a long time to fill, like 10 minutes. Not that I need to flush it sooner, just wondering if they are designed to work under higher pressure? Do they make toilet valves that work under lower pressure?

Steve_S
Member
# Posted: 27 Mar 2016 12:28 - Edited by: Steve_S
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There is a lot of different valves for toilet's and some do require pressure like those high efficiency noiseless jobbies. The standard A-Typical type with a ball cock valve is just a simple open/close valve, can't get any simpler.

Is it possible that you have a kink in the supply line ?
Is the feed valve open all the way ?
Any possibility that some debris or burrs got into the piping ?

May seem obvious but sometimes that's the bugger that get's ya.

Maybe an alternative if you can't get pressure would be to go with a "High Tank" conversion similar to this historical solution:
Victorian Solution

Looking @ Amazon, complete units are in a word KRAZY ! But there is tank kits and pipe kits too... Maybe a do it yourself solution in the making ?

Link to Amazon Victorian high tank toilet

paulz
Member
# Posted: 27 Mar 2016 14:19
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Good point, I'll check for obstruction. This valve has a float the slides up a tower and a small hose (under 1/4" looks like) from there that puts the water into another tube. Not like the old style with the float on a lever.

Thanks!

Julie2Oregon
Member
# Posted: 27 Mar 2016 18:20
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Ha! When I was in England, that is STILL common in a lot of buildings! Freaked me out at first to see a tank high up above the toilet. But IT WORKS!!! Can't see why you wouldn't be able to rig it up yourself!

Wondering if you have to plumb the tank at all. I was considering at one point situating the bathroom such that tubing from under my sink sent the greywater to the toilet bowl via a little tank so I could use the greywater to manually add the water to the bowl and make it flush after I did my bidness. More detailed than that, but you get the idea. Greywater for toilet flushing IS permitted but if you're building (and plumbing) to code, you have to follow their schema.

You could always just manually flush by adding water to the bowl.

RiverCabin
Member
# Posted: 28 Mar 2016 09:31
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Quoting: paulz
This valve has a float the slides up a tower and a small hose (under 1/4" looks like) from there that puts the water into another tube. Not like the old style with the float on a lever.


And there is your problem. I also have a gravity fed toilet and fought it for years. The problem is that the valves are VERY susceptible to debris. Go to a REAL hardware store, not Walmart. Look for a lever and ball style valve where the valve can be disassembled. It will be more than the 9.99 toilet repair kits. I think mine was around 27.00. Please understand that this isn't a fix, it is a workaround. It takes me a couple minutes to disassemble the valve on the toilet to clear any debris. Once you remove the valve top, the water pressure "fountains" out any debris blocking the line. I do this two to three times a season. I probably wouldn't have to do this at all if my filtering was better.

razmichael
Member
# Posted: 28 Mar 2016 10:15 - Edited by: razmichael
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May be debris but many current valves are designed for what may be more pressure than you are getting. Google low pressure toilet valves and you should get some good info. Lots of references to valves designed for very low pressures.

Slightly different note (and related to Julie's discussion on grey water in part), we trail and snowshoe race a lot from a location with an off-grid home. They also do meetings and things so have a couple of "public" toilets. Each has a bowl mounted on the top of the toilet cistern that drains into the cistern. The fill pipe is essentially a faucet into the bowl. Flush the toilet and wash your hands in the bowl as it feeds water (slowly) which then fills the cistern for the next flush. Dual use of the refill water!

EDIT: the water is rain water so not drinkable

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