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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 29 - Aug 3
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Description
Instant-Flow SR-Low Flow 0.35 GPM Point of Use Electric Tankless Water Heater, 20 Amp, 277-Volt, 5540-WattThe Instant Flow SR model is a great basic instant water heater for a wide variety of uses. It features a small size, low installation cost, and delivers unlimited hot water. It also meets the ADA requirements and is 99% Energy Efficient. This instant water heater is perfect for lavatories, sinks, showers, and other special applications. California residents see Prop 65 WARNINGS Under the counter, point of use applications Compact design, easy
The Instant-Flow SR model is a great basic instant water heater for a wide variety of uses. It features a small size, low installation cost, and delivers unlimited hot water. It also meets the ADA requirements and is 99% Energy Efficient. This instant water heater is perfect for lavatories, sinks, showers, and other special applications.- California residents
- Under the counter, point of use applications
- Compact design, easy installation, unlimited hot water
- Environmentally friendly, saves water and energy - 99% energy efficient
- Vandal resistant rugged cast aluminum housing, element assembly is fabricated from Celcon plastic, heating coils are chrome
- Meets ADA requirements and complies with standards for: water conserving product, IAPMO, UL, UPC
- Applications: commercial, industrial, residential, public lavatories, kitchen sink, bar sink
- Includes: compression fittings and faucet flow controls
- Certified for use in portable water applications
- No pressure and temperature relief valve needed (unless required by code)
- Meets all CALGreen low flow requirements
- Unit must be hard wired
- Model number: SR-20L/277 HTR-I
- Single phase
Features
| Item Weight | 4.5 |
| Minimum Temperature (F) | 33 |
| Maximum Temperature (F) | 160 |
| Heat Exchanger Warranty | 1 Year |
| Application Type | Point of Use |
| Efficiency Level | Super High |
| Pack Size | 1 |
| Finish Family | White |
| Returnable | 180-Day |
| Product Weight (lb.) | 4.5 |
| Commercial/Residential | Commercial,Residential |
| Wattage (watts) | 5540 |
| Required Volt Connection | 277 volt |
| Minimum Activation Rate (gpm) | 0.35 |
| Fuel Type | Electric |
| Indoor/Outdoor | Indoor |
| Flow Rate @ 45 F Rise (gallons/min) | .84 |
| Wattage (watts)2 | 5540 |
| Amperage (amps) | 20 |
| Flow Rate @ 55 F Rise (gallons/min) | .69 |
| Flow Rate @ 35 F Rise (gallons/min) | 1.08 gal (US)/min |
| Water Heater Features | No Additional Features |
| Uniform Energy Factor | .99 |
| Flow Rate @ 65 F Rise (gallons/min) | .58 |
| Product Height (in.) | 6.25 |
| Product Width (in.) | 9.625 |
| Product Depth (in.) | 2.75 |
| Water Connection Size (in.) | 0.375 comp. x 0.25 MP |
| Part Warranty | No Warranty |
| Labor Warranty | No Warranty |
| Certifications and Listings | ADA Compliant,CSA Certified,ETL Classified,IAPMO Certified,UL Listed |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.1 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
My Heels Were in Bad Shape. Like… Really Bad
Color: Gray
These moisturizing heel socks with the gel cushions were honestly a small miracle for me.
After recovering from cancer treatments, my skin became extremely dry everywhere, but my heels were the worst. They cracked so deeply they looked like fissures and were even bleeding. I tried lotions and bandages repeatedly with very little progress.
A friend suggested I treat my heel like it might have a fungal component, so I applied Lotrimin cream, put these heel socks on, and hoped for the best. Within three days, my heels were fully healed. I completed a 7-day routine, and my feet have never been softer.
The silicone gel cushion is comfortable, soothing, and stays in place. I loved it so much that I still treat myself about once a week, even though I really don’t need to anymore.
They are also washable. I hand-washed mine in the sink and let them air dry, and they came out looking brand new.
If your heels are cracked, painful, or need serious care, I highly recommend these.
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Reviewed in the United States on January 9, 2026
★★★★★ 5
Work well on hubby's heals
Color: Gray
Dr recommended these for hubby's dry cracked heals
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Reviewed in the United States on May 9, 2026
★★★★★ 3
Ehh. Not for me.
Color: Gray
Foot slides when walking in them. The fit was tighter than lead to believe. It did hold the moisture in but the silicone patch is small
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Reviewed in the United States on February 23, 2026
★★★★★ 5
Is this the CURE!
Size: Regular, Color: Cream
I have a skin disease called Ichthyosis Vulgaris. Yes, SCALEY FISH! Thanks MOM! This unfortunate crud leaves my heels an embarrassing mess! They are cracked and dry and literally like concrete. I have had this disease all my life and there is NO cure. It's hideous! Anyway, I have tried so many different experiments to help improve my situation. So much time and money I will never get back. So when I saw these, I had to give them a try too because I am a forever optimist and love being disappointed. Here's how it went.
First I put my dermatologist recommended AmLactin on my crusty heels. Then, I put the socks on. By the way, with no problem at all, and went to bed. I was not too hot, which is usually what happens when I sleep with socks on. I never even realized that I had them on. When I woke up, I took them off and immediately used a "Heel File" over a towel removing all the yuck!. Then, I sand papered them to smooth the skin out. Then, I doused them with Shea and Aloe foot lotion I found at the bottom of my experiment drawer in my bathroom. Oh, they felt like someone else's feet. I am very hopeful at this moment! Is this the cure to my embarrassing situation? I sure hope so. Spring is here and I would really like to wear my cute flip-flops when I go to the Waffle House and set at the bar. Wasn't that a picture on Facebook of someone nasty heels? It made me gag. Then, I had to make sure that picture wasn't me! I am going to do this for a week and come back for another review. Wish me luck ya'll!
UPDATE!
So it’s been about two weeks. I wish that I had taken a before and after picture. I guess I figure that this too will be a waste of money. NO! These little socks are a God send for me. I did buy AmLactin foot repair cream and that I highly recommend. It’s the best so far. They also offer an option with heel socks. They are soft and work very well also but one negative. They leave fuzzies on you feet and tools. Guys this is it for me. My search is over! I went to my mani/pedi queen yesterday and she was shocked when she saw my feet. She is spreading the word!
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Reviewed in the United States on March 23, 2025
★★★★★ 5
Great reusable moisturizing
Size: Regular, Color: Cream
Love these! Use them often to help moisturize my heels with my favorite moisturizer. Comfortable and easy to use
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Reviewed in the United States on May 21, 2026