I live in Texas where septic systems are pretty well governed. They
require that the aerator systems be adequately chlorinated... which I
am grateful I don't have to smell my neighbors discharge. However, I
am becoming annoyed at spending $180+ every year for chlorine tablets
when I understand liquid bleach dispensers are also allowed by law.
However, these dispensers typically run $300 and look like PVC pipes I
could get from my local home supply stores. I want to try and do it
myself and save the $300 equipment/installation cost and start using
Question 1) Can anyone point me to plans how to build my own?
Question 2) From my research, it appears ~1 gallon/month is the
typical bleach usage. Does this sound correct to people who already
use/know about bleach dispensers?
Question 3) Absent any plans, and believing the usage is ~1 gallon/
month, I believe I could cap a PVC pipe to hold some bleach and
integrate an IV drip dispenser. According to my math (which I won't
go into here unless requested), I figure I can set the IV drip on a 60
drop/ml to 1 drop every 11.4 seconds to dispense ~1 gallon of bleach/
month. By placing this dispenser between my two tanks (where I
currently drop the chlorine tablets) I expect I would achieve
approximately the same mixing effect as I do with tablets. The end
effect of this is for <$20 I could build my dispenser and start using
household bleach saving an additional $150+ each year.
Thanks in advance!
Not knowing how your existing system is set-up, your main problem will be to
regulate the chlorine to the flow. Generally with tablets, the higher the
flow, the faster they dissolve. If your system does not batch discharge, you
will want to regulate the chlorine so that more (or rather faster drop rate)
is injected during peak flow periods in order to achieve proper disinfection
(and odor control). You want to keep the chlorine at about 1.0 PPM to 4.0
PPM to achieve disinfection (closer to 1.0 PPM is better). You need to base
your usage (volume required) calculation on flow and usage as opposed to an
average of 1 gallon/month.
The other problem you have to deal with is that liquid chlorine injection
systems do have a tendancy to clog under certain circumstances.
You will still have to conduct maintainence of the system on a regular
Don't know any plans offhand but try googling it might just work.
Just so you understand................Household bleach is 1/2 the
concentration of liquid pool shock or tablets. Thus you will need
twice the amount of liquid household bleach to achieve the same as
what your tablets are doing.
Could be much worse, around here being connected to the public sewer system
costs twice what you're paying for tablets, maybe more.
I don't have any kind of picture of what you're driving at, but a few
questions pop to mind.
Is this stuff located outside? What do you do about freezing? And will a
gallon of bleach in this thing hold onto the chlorine or will the chlorine
evaporate off, leaving you carefully dripping water into your system. And
lastly, since you say septic systems are pretty well governed, what are the
legal requirements? Would doing something like this mean you are installing
a proprietary treatment system that needs to be tested and licensed? Will
something like this require you to have a maintenance contract, or get
training from a licensed installer?
I thought there were exacting requirements for what the chlorine does -
something like kill 99% of bacteria in the effluent within a stated period
of time. It's a bit of a stretch to think that a drop of bleach every 11
seconds will do that.
For the most part, at least in texas, there are two types of septic systems. The
original is a totally in ground system that requires very little attention
besides dropping some additives down the sink or toilet every once in a while
to keep things alive and eating the bad stuff in there, then every so msny years
have the tank sucked clean.
The second is the aerobic system. This is typically for areas that dont have
very much earth depth or you lack proper yard space to have a leech field. I
have an aerobic system, unfortunately, but have enough space to have a
conventional, it was already here when I bought the place.
The chlorine type tablets that we use (NOT pool tabs!) are getting stupid
expensive. Ten years ago a bucket was like 50 bucks,now its over 80!! Insanity!
Its a rape price for a standard, cheap chemical. Aerobic systems are
'regulated' if you want to call it that. You have to get a maintenance contract,
but there is no maintenance, preventative or otherwise, going on! They come
out, test to make sure the pump works and the alarm sounds properly, check for
tabs and look to see if ants are into anything and that is it.
They come out quarterly I think, and I get written up off and on for not having
tablets in the drop chute. ...but heres the deal with that... If I kept them in
there constantly it would EASILY go through an entire bucket in less than a
month. Just doing laundry and showers goes through them like crazy, so I meter
them out every so often and will drop in three. Even the amount I put in is
overkill, you can poke your head in the tank and it smells way worse than a
shocked swimming pool!! If they were doing their job, which they dont, they
would do a water test when they dont see tabs in the tank. ...but that would
take too long and they would have to do their job! (Heaven forbid) ...they dont
even clean the air filter!
The city is just as bad, they'll send me a letter for something that happened
six months ago and is already fixed, which they would know if they looked at
current records,meanwhile the guy a couple houses down across the street has an
in ground septic with a busted leech field pipe that is flooding the back
pasture with sewage. His neighbor has bitched to the city and they do nothing
(because they dont like him) ...for years! He finally called the EPA and they
came out this weekend, heh.
I'm going to build a liquid bleach dispenser myself, I've seen pictures of
numerous brands, ALL made out of nothing but PVC and clear tubing.
The design I think Ive settled on not only has a sort of drip but has a suction
line tied into the sprinkler head line, so that when the sprinkler comes on it
injects bleach into the sprinkler line AND injects bleach down into the main
tank. The reservoir for the bleach is heavy sched bury PVC, 4 to 6" and is set
down into the tank, though you could make small ones, Im going to make a nice 8'
Tall one that sits in the tank so I can load it up with at least ten gallons
I expect the usage, just for me and my wife, to be more than the one gallon a
month I see being listed. Ill adjust the flow rate a bit high. Im not going to
use injector nipples either, Im going to use shutoff ball valves so I have nice
control over the flow/pull rate.
replying to Anthony, Km wrote:
I just bought one. They are cheap to buy considering they will pay for
themselves in a short time. I made a short video on how I installed mine. I
bought mine made by LBC. https://youtu.be/ltuUtu5qKiU
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