Instant-Flow® Water Heaters

Proudly made in the USA
Since 1966, Chronomite Laboratories Inc. has been the innovative leader in providing solutions for commercial and industrial tankless plumbing applications. Their units offer on-demand, unlimited hot water by heating the water as it passes through the celcon waterways. Their uniquely designed element assembly, which allows flow-through abrasive action of water, creates a self-cleaning feature, eliminating alkali calcification build-up.® is pleased to offer their quality products.

Instant-Flow® SR Series Electric Tankless Water Heaters

Electric tankless hot water heaters are an ideal solution for hot water problems in remote locations, or where you don't want the hassle of a large tank-style water heater. Designed to be a compact and efficient primary water heater, these powerful machines must be supplied with cold incoming water only, making it easy to choose the right temperature rise to meet your hot water needs. If you only need to take the chilly edge off the incoming water, or you have warmer incoming ground water, select a low rise model, like the 24°F or 33°F rise units. Get hot water to a dishwasher with a 75°F rise in water temperature. Or pair these tiny tankless water heaters with a quality thermostatic mixing valve for endless hot water in your shower. Whichever unit you choose, you're sure to get a point of use tankless water heater that will work as hard as you do for years to come.

Instant-Flow point of use electric tankless water heater
These point of use water heaters feature:
  • An ideal solution for instant hot water to lavatories, sinks, showers, dishwashers, kitchen/bar sinks, and other special applications
  • Instantaneous, on-demand hot water in two seconds, reducing hot water delivery time and potential water waste
  • Uses only a cold water line and electrical hookup
  • Eliminates need for costly piping/valving associated with conventional hot water heaters, saving you time and money
  • Easy to install, compact size fits nearly anywhere and maintains wheelchair accessibility
  • 98% energy efficient
  • Unique self-cleaning design for reduced maintenance requirements
  • Vandal resistant cast aluminum housing includes integral mounting brackets
  • Min flow options of either 0.5gpm or 1gpm
  • Faucet flow controls and compression fittings included
  • Must be mounted horizontally only to prevent heating element burn out
  • Dimensions: 6-1/4"H x 9-5/8"W x 2-3/4"D

Low Flow SR Series Models

Model Watts Volts Amps Pressure (psi)
Max Operating
Temperature Rise °F Price & Quantity
SR-15L 1800 110/120 15A 25/150 140°F 30°F 24°F $266.75 Enter a quantity and
4150 277 15A 25/150 140°F 71°F 57°F $266.75 Enter a quantity and
SR-20L 2400 110/120 20A 25/150 140°F 41°F 33°F $266.75 Enter a quantity and
4160 208 20A 25/150 140°F 71°F 57°F $266.75 Enter a quantity and
4800 220/240 20A 25/150 140°F 81°F 65°F $266.75 Enter a quantity and
5540 277 20A 25/150 140°F 94°F 75°F $266.75 Enter a quantity and
SR-30L 3600 110/120 30A 25/150 140°F 61°F 49°F $266.75 Enter a quantity and

* Please note: Temperature rise designed for warm incoming water temperatures.

Standard Flow SR Series Models

Model Watts Volts Amps Pressure (psi)
Max Operating
Temperature Rise °F Price & Quantity
SR-30 6240 208 30A 25/150 140°F 66°F 42°F 28°F $270.36 Enter a quantity and
7200 220/240 30A 25/150 140°F 64°F 49°F 33°F $266.75 Enter a quantity and
8310 277 30A 25/150 140°F 64°F 57°F 38°F $266.75 Enter a quantity and
SR-40 8320 208 40A 25/150 140°F 87°F 57°F 38°F $270.77 Enter a quantity and
9600 220/240 40A 25/150 140°F xxx 65°F 44°F $266.75 Enter a quantity and

Don't know what your incoming water temperature is? This groundwater map might help.

Instant-Flow® Micro Tankless Electric Water Heaters

These compact electric tankless water heaters are all designed with a factory preset temperature stop. Since the preset temperature limit cannot be changed in the field, it can't be changed accidentally, which virtually eliminates any danger of scalding. The factory-preset temperature stop also means that these electric tankless water heaters are fine to use as a secondary heater to boost pre-heated water and still keep sensitive skin safe.

Instant-Flow Micro tankless water heater
These Micro series tankless electric water heaters feature:
  • Great for use in public lavatory, non-public lavatory, kitchen/bar sink, service sink, scrub sink, shower, dishwasher and special applications
  • Unlimited hot water is delivered at an even temperature without risk of scalding
  • Digital microprocessor control monitors the water temperature and helps prevent scalding and burns
  • Responds to fluctuations in incoming water temperature, pressure, and flow rate regulating the water temp over 100 times per second
  • Compact size can be installed nearly anywhere and meets ADA requirements by maintaining wheelchair accessibility
  • Can be supplied with either cold or hot water to the inlet line
  • 98% energy efficient
  • Low installation cost - 3/8" compression fittings included
  • Select from factory preset temperatures at 104°F, 110°F or 120°F (please specify below)
  • Dimensions: 6-1/4"H x 9-5/8"W x 2-3/4"D

Low Flow Micro Models

Model Watts Volts Amps Temp Rise
@ 0.8 GPM
Temp Rise
@ 1.0 GPM
Price & Quantity
Factory Preset 104°F
Price & Quantity
Factory Preset 110°F
Price & Quantity
Factory Preset 120°F
M-15L 4150 277v 15A 35°F 28°F $334.66 $334.66 $334.66 Enter a quantity and
M-20L 2400 120v 20A 20°F -- $334.66 $334.66 $334.66 Enter a quantity and
4160 208v 20A 36°F 28°F $334.66 $334.66 $334.66 Enter a quantity and
4800 240v 20A 41°F 33°F $356.91 $356.99 $356.95 Enter a quantity and
5540 277v 20A 47°F 38°F $334.66 $334.66 $334.66 Enter a quantity and
M-30L 3600 120v 30A 31°F 25°F $334.66 $334.66 $334.66 Enter a quantity and

* Please note: Temperature rise designed for warm incoming water temperatures.

Standard Micro Models

Model Watts Volts Amps Temp Rise
@ 1.0 GPM
Temp Rise
@ 2.0 GPM
Price & Quantity
Factory Preset 104°F
Price & Quantity
Factory Preset 110°F
Price & Quantity
Factory Preset 120°F
M-30 6240 208v 30A 43°F 21°F $334.66 $334.66 $334.66 Enter a quantity and
7200 240v 30A 49°F 25°F $334.66 $334.66 $334.66 Enter a quantity and
8320 277v 30A 57°F 28°F $334.66 $355.59 $334.66 Enter a quantity and
M-40 8320 208v 40A 57°F 28°F $334.66 $334.66 $334.66 Enter a quantity and
9600 240v 40A 66°F 33°F $334.66 $334.66 $334.66 Enter a quantity and
11080 277v 40A 76°F 38°F $334.66 $334.66 $334.66 Enter a quantity and

NOTE: The microprocessor adjusts the heater's power for variations in flow rates and pressure to assure the selected factory preset water temperature. The microprocessor limits temperature rise according to the factory set temperature.

- OR - View Cart

Water Heater Scale Inhibitor System

image of complete scale inhibitor system
This scale inhibitor system features:
  • Highly effective in treating scale, corrosion and iron build-up for up to 6 months
  • Food-grade hexametaphosphate crystals dissolve slowly in water to prevent lime, scale and rust build-up
  • Forms a protective coating on all metal surfaces, safeguarding against acidity/alkalinity, hardness, chloride and other factors which effect the corrosion of water equipment and pipes
  • Maintains efficiently and extends life of system
  • Up to 5gpm
  • Recommended for use with water heaters, ice machines, vending machines, food service equipment, air conditioning and many other types of water processing applications
  • If using on a water heater, it needs to be installed on cold water line entering the water heater
  • Dimensions: 2 7/8" x 9 5/8"
  • Recommended time to change/replace this inhibitor cartridge is 4-6 months
  • It's a good idea to purchase a replacement cartridge to have on hand when needed!
  • For more information, go to our Scale Inhibitor Page

Description Price & Quantity
Scale Inhibitor System:
includes housing, cartridge and mounting bracket
$116.17 Enter a quantity and
Replacement Inhibitor Cartridge
Save on shipping by ordering replacement cartridge now!
$36.47 Enter a quantity and
Mounting Bracket:
included with Scale Inhibitor System
$10.48 Enter a quantity and

Note: Prior to ordering, please check/confirm the temperature rise limits of all brands of instant tankless water heaters to make certain that they will meet your needs. We guarantee that they will heat as the manufacturer states in the specifications, but instant heaters are not for every water-heating application and will only offer the heat rise stated for each model.

Related Items & Accessories

Frequently Asked Questions

Q. "If I order an Instant-Flow® Micro with a factory preset temperature of 104 degrees, what happens after I've received the unit and realized that I want it to set at 110 degrees. Can I change the temperature then? Is that possible?"
A. No, you will not be able to change the factory preset temperature for these units. So before ordering, make sure to select one with the desired factory preset temperature. If you want to be able to change your water temperature you can order the Instant-Temp® water heaters, which allow you to adjust/change the water temperature.

Q. "Will an instantaneous water heater save me money on my utility bills?"
A. In many applications you can see a savings. There are some variables that could reduce the amount you save. One example is you will not run out of hot water, so longer showers could cut into your savings. Also, the cost of electricity, propane and natural gas in your area will affect the amount of money saved. The higher the cost for the energy type used to heat your water, the quicker you can recover the higher initial cost of installing a tankless versus tank style water heater.

  • You will never run out of hot water. "You want an hour long shower? No problem!"
  • Electric units can be installed at the point of use.
  • You're not paying energy costs to heat water 24 hours a day.
  • Our electric units don't require a T&P valve (no tank!) - if code allows.
  • Installing a tankless water heater can indeed be a bonus to the environment. (Why choose wastefulness when we're talking about finite natural resources?)
  • They all need a minimum flow rate & pressure to turn on.
  • Electric units need heavy gauge wire, while gas units need a much larger, special flue pipe and larger gas supply than a conventional water heater.
  • At times they can produce very hot water. It's easier to get scalded - but this is easily mitigated with anti-scald valves.
  • With some brands, parts are hard to find (not a negative if you originally purchase from us, as we like to carry parts for the units that we sell).
Tankless water heaters have their place. They're not "the answer" to every hot water need, but if they're used correctly they can be the solution to many of them.

Q. "How come there is not a factory preset temperature with the Instant-Flow® SR models?"
A. The temperature you get from the units are going to depend on the model ordered and the incoming water temperature.

Q. "Your products specify the 'temp. rise' based on the gpm flow; what do you mean by this?"
A. Temperature rise is the amount the heater raises the temperature of the incoming water, based on the flow rate shown of that water. If you don't know what your incoming water temperature is, we offer a chart that shows average groundwater temperatures in the USA, or you can check with your local water district for the actual temperature in your area. Please note this can be adjusted by any sort of preheating (such as solar heaters).

Q. "How much do I need to raise my incoming ground water temperature for ____________"
A. This is a highly personal question as everyone's opinion is different. Combine that with the differences in incoming water temperatures and you have a different answer for each installation. However, a lot of studies have been done on what people (on average) find comfortable, so we can give you some very general numbers to help you narrow the possibilities. These studies have shown that most people are comfortable washing their hands at near body temperature and find showers comfortable at 95°F to 105°F, depending on whether they prefer cool or hot showers. Nearly everyone agrees that 57°F is too chilly for comfortable hand washing, much less showering.

Q. "I'm hearing a lot about lead-free these days. What does that have to do with plumbing products and how does the new lead-free legislation affect me?"
A. Basically, the laws implemented Jan. 1st, 2014 require plumbing products that come in contact with drinking water to be "essentially lead free" (less than 0.25% weighted average). For further information about how the law determines what is "lead free", rules regarding which plumbing products must be "lead free", and who these laws will affect, please view our page.

Please note: While we strive to ensure every product we label as "Made in the USA" really is 100% made in the USA, it is also important to understand that sometimes manufacturers make changes to their products, or for various reasons may receive components or materials that they would normally purchase domestically from an overseas supplier - and they don't necessarily let distributors (like us!) know that they've changed something about the product or where it is manufactured.

If you receive a product that® says is "Made in the USA" and the product states it was manufactured elsewhere, please contact us. We will happily replace or refund your purchase to your satisfaction.

return to top ↑

Copyright© 1995-2024
All Rights Reserved.