Tankless water heater and whole house filter...?

[JustinKScott]

So, if I want to remove the step of aging tap water...

Can I just buy: Tankless water heater and whole house filter with chlorine filter...?

I should measure the tap PH vs aged PH to make sure there is no difference. Otherwise, is there anything else to worry about?

[JustinKScott]

Just tested straight tap vs aged... Same ph.

[cjr8420]

i wouldnt trust the filter for 100% chlorine removal.if the only reason u age ur tap is chlorine removal use a dechlor and go

[nc0gnet0]

I am not so sure a tankless water heater would keep up, how many gallons would you be changing at a time?

[April]

That's the whole idea of a tankless water heater. You don't run out of hot water.i have one in my grooming/fish store. Runs all day for bathing dogs and filling fish tanks. Very low gas bill also. I use my water straight from the tap. A bit of prime.



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I am here: http://maps.google.com/maps?ll=49.275115,-122.835478

[YSS]

That's the whole idea of a tankless water heater. You don't run out of hot water.i have one in my grooming/fish store. Runs all day for bathing dogs and filling fish tanks. Very low gas bill also. I use my water straight from the tap. A bit of prime.



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I am here: http://maps.google.com/maps?ll=49.275115,-122.835478

If so, why wouldn't you use the tankless heater for everything you do in the house or do you? Also, if you don't want to age water, you can also consider RO sytem but then may be that's what you have in mind. I have been thinking about RO for my tank.

[jimg]

I run all the water that comes into my house through a carbon filter(http://www.afwfilters.com/store/carbon-mechanical-control/mechanical-carbon-15-system-fleck-5600-72.html) then 1 micron. I also installed a tankless water heater. I still age the tap if I'm doing a big wc with it to off gas it, my ph will rise from 7.5 to 8.0+ plus I age to eliminate the micro bubbles. Tankless water heaters are very good, but other than faster, non stop hot water at less cost, there is no difference from a normal heater

[nc0gnet0]

I run all the water that comes into my house through a carbon filter(http://www.afwfilters.com/store/carb...k-5600-72.html) then 1 micron. I also installed a tankless water heater. I still age the tap if I'm doing a big wc with it to off gas it, my ph will rise from 7.5 to 8.0+ plus I age to eliminate the micro bubbles. Tankless water heaters are very good, but other than faster, non stop hot water at less cost, there is no difference from a normal heater

I cant imagine that a tankless water heater could keep up when I am changing 200-400 gallons of water non-stop....am I wrong? I guess if you kept the flow rate low enough it might, but I am typically running a 2000 GPH pump from my storage barrels.

[jimg]

depends on what size heater you have. I can run my house water all faucets full open 24 hrs and never lose hot water.. unless I run out of propane!
this http://www.tanklessking.com/Rtg84dvp-Rheem-Tankless-Rtg-66dvp.aspx

[YSS]

Tankless water heaters are very good, but other than faster, non stop hot water at less cost, there is no difference from a normal heater

This was my point. I guess I will have to look into one when I need to replace my current heater. I heard of geo-thermal heater as well. Anyone uses one?

[nc0gnet0]

Interesting I have not looked into the technology for a few years. Propane is not an option for me, nor is an outside the house heater. Looking at the natural gas model:

Rheem RTG-84DVN Direct Vent Natural Gas Tankless Water Heater

Temp Range 85 - 140 degrees F
8.4 gal/min at 35 degree rise max.
6.7 gal/min at 45 degree rise max.
3.9 gal/min at 77 degree rise max.

With my ambient water temp at close to 55 degress it looks like this model would do 500 GPH at the minimum 85 degrees. Still awfully slow, but doable. I wonder how hard they are do hook up as an add on used for only my discus tanks/RO setup? Primary concern would be the vent pipe.

Rick

[jimg]

Interesting I have not looked into the technology for a few years. Propane is not an option for me, nor is an outside the house heater. Looking at the natural gas model:

Rheem RTG-84DVN Direct Vent Natural Gas Tankless Water Heater

Temp Range 85 - 140 degrees F
8.4 gal/min at 35 degree rise max.
6.7 gal/min at 45 degree rise max.
3.9 gal/min at 77 degree rise max.

With my ambient water temp at close to 55 degress it looks like this model would do 500 GPH at the minimum 85 degrees. Still awfully slow, but doable. I wonder how hard they are do hook up *** an add on used for only my discus tanks/RO setup? Primary concern would be the vent pipe.

Rick
I was able to put mine in the cellar against an outside wall so I only needed to vent up 16" then a 90 bend, venting is the hardest part, the rest is very easy. I would never go back to a 40-60 gal tank heater. A friend of mine did an electric tankless and his electric went down quite a bit, no venting.
check the flow rate into your house I'll bet it's not much more than 7-8 gpm with using a 3/4 outlet full open, most faucets run only 1/2" pipe. mine is set at 104 and water at 7gpm and water stays at 104 constant, short while checked anyway at 1/2" pipe.

[YSS]

What kind of heater do you have Jim?

[JustinKScott]

I have an RO unit which produces 150gpd. I use it exclusively for my breeding pairs.

Grow outs I use aged tap water... Because it is more abundant and gets them used to water they might encounter once sold.

Tankless heaters never run out of water, they flash heat the water as its going through. The electric heaters are more efficient ($) than the gas ones. The limitation is the flow rate.

The one I was considering (for just the fish room) has a max flow rate of 2GPM. I think I might have to consider a larger one, b/c I have a lot of tanks.

[nc0gnet0]

Jim, I haven't checked the flow rate into my house, but for residential, the pressure is really good at 75-80 PSI. It blows up most garden hoses when left on with a sprayer nozzle in the off position. I run RO/tap in all my tanks so the heater would need to be plumbed to my storage barrels and not the water main. My RO is plumbed to the water main before it hits the water softner that is used for the rest of the house. My RO discharge is then fed into a basement sump pit (low water table where I live) thus the sump pit in the utility room in the basement.


check the flow rate into your house I'll bet it's not much more than 7-8 gpm with using a 3/4 outlet full open, most faucets run only 1/2" pipe. mine is set at 104 and water at 7gpm and water stays at 104 constant, short while checked anyway at 1/2" pipe.

So then you are mixing hot/cold at the tank for your refills and not dialing in the desired temp at the hot water heater?

Rick

[JustinKScott]

[...] age the tap if I'm doing a big wc with it to off gas it, my ph will rise from 7.5 to 8.0+ plus I age to eliminate the micro bubbles.

Tell me more about micro bubbles... I've hear their name before, but never understood what they are or why they are bad.


Tankless water heaters are very good, but other than faster, non stop hot water at less cost, there is no difference from a normal heater

This is exactly why I want one. ;)

[jimg]

What kind of heater do you have Jim?
http://www.tanklessking.com/Rtg84dvp...Rtg-66dvp.aspx I posted this one but I have the 64 not the 84

[nc0gnet0]

The one I was considering (for just the fish room) has a max flow rate of 2GPM. I think I might have to consider a larger one, b/c I have a lot of tanks.

yeah that would be gawd awfull slow if doing more than a few tanks.........

[jimg]

Rick
yes I mix hot /cold as needed to the tanks for small changes, otherwise I have storage for ro and tap.
I have my ro going cold into a 55g drum then let it heat with aquarium heater.
I have my water pressure at about 55 -60 psi so that's probably why I get hotter water than you would.
I really don't know how you could hook one up for your use, but there are point of use tankless ones you could look up. I know mine needs a certain flow rate before it will work too, so that might limit you.

[jimg]

Tell me more about micro bubbles... I've hear their name before, but never understood what they are or why they are bad. when the water in the winter is colder it doesn't release the gasses as easily as warmer water, so when some of us add water from the faucet to the tanks we get millions of tiny bubbles that cloud the water, it's not so much the bubbles you see, but the very very small ones can cover the gills and block 02 and the co2 being released from them can also burn the gills. not a scientist, just what I have been told!

[nc0gnet0]

I know mine needs a certain flow rate before it will work too, so that might limit you.

thanks Jim, I am going to look into this. Getting a pump to handle the required flow rate is easy enough, but if the heater needs a certain PSI to operate properly that would be a bit costlier in terms of a pump.

Rick

[jimg]

thanks Jim, I am going to look into this. Getting a pump to handle the required flow rate is easy enough, but if the heater needs a certain PSI to operate properly that would be a bit costlier in terms of a pump.

RickLet me know what you come up with, I think your better at researching and detail than I am. I get an idea and try it, I take the easy way! I think it is flow, gpm that effect it, not pressure.

[April]

My fish are at my shop . I don't have a on demand heater where I live. I installed it in my petshop and grooming shop as I used to run out of hot water to do wcs and I couldn't do wcs and wash
Dogs
.now we can wash 15
Dogs In a row and fill tanks with a separate hose and never run out.


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I am here: http://maps.google.com/maps?ll=49.275090,-122.835283

[nc0gnet0]

Hey April,

I got three Sammy's I can send your way for a good wash and groom ;) But seriously, washing dogs would be alot less demanding then the constant flow of filling 14+ tanks. My situation becomes a bit more complicted as I use RO on all my tanks, water here is terrible for discus, not too mention I run a water softener for the house. Although, perhaps it might be feasable to get a good sized one of these and then have it do dual duty, both for the house and the fish tanks as it would be pretty easier to flush the tap water from the heater (no tank), All it would take is dual input valves on the heater that I could alternate between tap and RO.

[jimg]

Rick
check this out. he has other hard water systems that don't use salt too.http://www.afwfilters.com/store/salt-free-conditioners/scalemaster-hardwater-wizardandreg-rw10-electronic-water-conditioner---1-pipe-309.html
I have bought all my water filter systems from these guys.

[cjr8420]

Hey April,

I got three Sammy's I can send your way for a good wash and groom ;) But seriously, washing dogs would be alot less demanding then the constant flow of filling 14+ tanks. My situation becomes a bit more complicted as I use RO on all my tanks, water here is terrible for discus, not too mention I run a water softener for the house. Although, perhaps it might be feasable to get a good sized one of these and then have it do dual duty, both for the house and the fish tanks as it would be pretty easier to flush the tap water from the heater (no tank), All it would take is dual input valves on the heater that I could alternate between tap and RO.
nice idea i never would think to run RO storage thru a tankless water heater but would probally work good with the right pump might try dual outputs to so ur not pumping ro thru all ur un flushed pipes

[nc0gnet0]

nice idea i never would think to run RO storage thru a tankless water heater but would probally work good with the right pump might try dual outputs to so ur not pumping ro thru all ur un flushed pipes

Just a spigot at the output side should work.

[chahdi]

I think it’s a bit late now to share that now, but may be next time you can check this website where you can find a very interesting buying guide on Tankless water heater. This one.

[Willie]

I have a tankless water heater in Minneapolis and it also acts as a boiler to heat the house. But beware, mine cost $10k for the unit and another $10k for installation. Of course, my electrical cost is almost nothing now. ;)

Willie

[Cove Beach]

On my current setup i am using a tankless heater dedicated for just heating my aged water from room temp in the basement (72 deg) to 85 to then add to the sump for water changes. The unit i have will flow 2.0 GPM and heats 55 gals in 12mins. I use a Pan World pressure rated pump to push water from the drums to the heater and back, and also to move the heated water to the sump. There are pictures on My Tank Journal under Sweet Water Reef.