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Availability:
In Stock.
Arrives
Monday, Nov 2
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At a glance
- Condition
- New
- Size
- H20-RS1 110V 2KW
- Model
- 159l
- Dimensions
- 7 x 7 x 8 in
- Weight
- 3 lb
Features 7
- Requires a 20A circuit(Connect 20A adapter or breaker),with 1.5" outlet , min 0.35MPA pressure,suggest work with at least 0.25HP,suitable small bathtub & spa tub /hot tub 2 KW /110V-120V.No plug, just 3 cables,Black Cable is Live,White Cable is Neutral,Green Cable is Grounded.
- We suggest water capacity not more than 400 US gallon,the heater won't work if it exceeds the standard, see the picture 2.
- We suggest the pump not less than 200 wat (3600 L/ h), small pump will cause the heater cannot work,see the picture 3.
- Make sure the mount direction is correct,arrow direction is the water flow direction,wrong direction will not make the heater work. see the picture 4.
- A quick method for detecting heating pipe damage,see the picture 5.
- When the heater doesn't work,use a multimeter to test the 4 points to determine which component is damaged,see the picture 6.
- If have any issues with heater,please take some photo of the using environment,including installation direction,set temperature,pump and water capacity,we will help you troubleshoot.
Description
UCEDER will provide a polished look to your patio,enhancing outdoor living. Enjoy your outdoor sanctuary without worry or hassle. UCEDER was established in 2016 by a team of passionate garden enthusiasts with 8 years production experience ,it was born out of a passion for beauty and dedication to quality. We are committed to create outdoor yard garden products, We understand the rhythm of hard work, the melody of dedication, and the symphony of craftsmanship. With each stitch, each seam, and each meticulous detail, we weave our dedication into every fiber of our products. Inspired by colorful Chinese tradition and the vibrant American life,seamlessly blends traditional craftsmanship with contemporary design to offer you a range of products that elevate your outdoor garden experience. We take pride in delivering products that exceed your expectations, leaving you free to enjoy your outdoor garden sanctuary without worry or hassle. Each product has been professionally designed and strictly tested to ensure durability、 longevity and meet our stringent standards. for this heater the important thing need to make sure enough water flow,suggest the pump not less than 200 wat (3600 L/ h), enough flow to turn on flow switch "TRIPS" and when the flow decreases to NOT enough it shuts the heater down. That way if for some reason the flow is too slow it will not over heat the unit and it will not even work at all till the flows correct. Make sure the mount direction is correct, there is a arrow direction shows the water inlet and outlet marked on the heater, wrong direction will not make the heater work. Standard pipe size 1.5 inch， smaller pipe can not make sure enough flow volume. Put Hot Water in your Hot Tub,Not Put Cold Water.when temperature up to your setting temperature it will stop automatically. when temperature is dropped down, it will heat up water until your set temperature. Need Insulation cover to keep whats already been heated,or it will take long time even will not be able to catch up.
Specs 4
| Product Dimensions | 7 x 7 x 8 inches |
|---|---|
| Item Weight | 3 pounds |
| Manufacturer | pool spa part |
| Item model number | 159l |
No specs match.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Nov 2
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Great for stock tank hot tub
I bought this for my 8' stock tank pool to make it a hot tub during the winter. I read other mixed reviews that had also bought it for converting a stock tank pool to a hot tub. I gave it a try because I didn't want to setup a propane instant hot water tank setup. It did take a couple trips to the local hardware store to get all the proper fittings but I got it all connected and up and running. I did run into the same problem at first of the heater not kicking on so I tried taking the top cover off like others said they did and I tricked the switch to be on. Also I did have to plug it into a 20 amp plug. While I was trying different things, I had changed the filter on the Intex 1500 filter pump and noticed the flow switch was working like it should so I put it back together with no modifications and it works great, I just change the filter every 2 to 3 weeks and have no issues. I did also buy a Bayite temperature controller plug and plugged the filter pump into it on the heat plug and have the temp set to turn off at 100° and have it kick back on at 98°. I did have to change the plug on the Intex filter pump to a non GFI plug because every time the temperature control plug shut off when it reached 100° the GFI plug on the pump would pop off. I have had no issues in 2 months now and am loving it. It did take a few days to get up to temp, I live in the foothills of California and the temp here recently has been in the high 50's to low 60's during the day and mid to high 30's overnight and it keeps it to temp with no problems. I have a blue bubble cover and a black 8' pool cover on it to help keep in the heat.
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Reviewed in the United States on November 29, 2022 by Nicole
Burned out only 1 1/2 months after purchase
UPDATE: It turns out that these heaters all have a poorly designed thermostat that burns out due to combination of corrosion and heat. I've since modified both of the units I purchased to utilize an external theromostat device and now they both function without issue. Original Review: It worked really well and heated my 300gal hot tub quickly and maintained temperature even during some very cold days. Last week it stopped heating the tub. I thought maybe it wasn't getting enough flow so I replaced my filter (it was still relatively new and not clogged) but still wouldn't work. Today I bypassed the paddle switch that detects flow, no change in wattage (item was pulling 0 wattage). Multimeter tested all circuitry... no tripped internal breaker, the dial had a good ohm range, continuity throughout all wires.... tested heater element, no continuity or resistance.... The heater elements burned out... only a month after buying it. Not happy!
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Reviewed in the United States on June 19, 2021 by Gregory Taylor
Works awesome to heat an 8’ stock tank pool, but you gotta put some thought into it.
I bought this to use to turn our 8ft diameter stock tank pool into a hillbilly hot tub. The reviews here are hit or miss, but I have nothing but positive things to say about it. We’re hitting 110 degrees, but here are a few critical tips if you’re using it with a stock tank pool. 1. Wire it up to a heavy duty plug and use it on an otherwise unused gfci protected outlet. I wired mine to a heavy duty outdoor extension cord and it works fine. 2. You need to have good flow from your pump in order for it to activate. Like someone else here posted, I epoxied a large fender washer to the metal flapper arm on the outlet side of the heater. Before that, even with our 1500gph Intex pump, the flow switch would only occasionally engage (you can see this if you remove the top cover and watch when you run water through it. With the washer it engages with authority. 3. It took me about an hour at Lowe’s to get the fittings together that would allow me to hook this up to my pump and outlet valve, but the most critical part was buying a length of flexible hose meant for pool cleaning accessories (also from Lowes) and a couple flexible rubber reducers. 4. The most important part that I learned was that these things take a good bit to get up to temp. I thought mine wasn’t working because I felt no heat from the unit in the first hour or two. The issue was that with a large 700 gallon tank like ours, the initial heat takes a good 12 hours. The water hit 95 degrees in 12 hours, but went all the way to its max of 110 degrees within another 6. Using it with a DIY insulated cover (1.5” rigid foam and redwood fenceboards) I only need to run it for a few hours a day to keep it around 100 degrees. Obviously this is no substitute for a 220v powered, and heavily insulated modern hot tub, but if you like the aesthetics of a rustic stock tank pool but want to use it when it gets cold, this is a solid way to go.
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Reviewed in the United States on October 27, 2020 by Chris
You need to pay attention to the direction the water is flowing.
This is a good value and makes repair and building of a hot tub easy. I knocked down the stars for two reasons. 1. If this is for a repair, sometimes it will need to be installed after the pump in the flow of water. The instructions actually indicate an installation before the pump. And then the arrows on the pump are used to indicate water flow direction. The unit can be after the pump, but the flow switch only works in one direction. The arrows on the unit should point toward the pump, whether installed before or after the pump. So far in several weeks, I have not been able to get it to cycle correctly. It will heat the water to the set temperature and then shut off, but every time it recycles it heats to a higher temperature. I may have to reduce the rating to one star. I suspect some of the returns are related to this. The seller should have known this and answered some of the questions with it in mind. 2. In my case number 1 was not immediately obvious, because it didn't work either way. I finally took the cover off and accidentally discovered the actual limit switch was not seated corrected in the slot provided. It wasn't making contact with the metal flapper. With the water flow off I just pushed it down. It now works and I don't think it will work back up. But it was loose enough that it probably was displaced during shipping. The actual installation is fairly straight forward, even if convoluted. My tub had a 2" outlet so I had to reduce to 1 1/2"-heater-back up to 2". Then from the pump back to the tub from 2" to 1". All fittings are easy to find. It will not heat the water in a small 2 person hot tub. 5' by 22" water depth in 45 minutes as stated. But I knew that was not true. Probably raise the temperature of the water about 20 degrees in 5-6 hours. Better instructions and securing that switch would have made it a 5 star all the way. The instructions were actually quite detailed. Enough so that reading them is a major hassle. And some key details were left out. No provision for installation deviation. A general repair part is not going to be able to be installed exactly the same every time.
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Reviewed in the United States on September 16, 2020 by Larry J. Guthrie
Great if you get a working one
I've owned and worked with a lot of these pumps. I also refer a LOT of people to these who are building heated stock tank pools. They work great to put inline after your pool filter/pump. However, they're not very well built and the trigger to engage the heater is often way out of tolerance and essentially doesn't work. I'd say that 1 out of 3 are defective in some way. Before you install it, see if the the flapper engages properly. Quite often, even full motion of the flapper doesn't engage the heater, and it simply won't turn on, ever. When you see people gluing washers or nickels or whatever to the flapper, it's not because their pool pump is weak, it's because the tolerance is way off when these are built. The other issue with these is that the temperature dial is prone to failure in time. I've had them fail. Since I use a temperature controller, I can often bypass the built in temp dial. But this is not suggested, as it will void the warranty. But the temp dial is garbage anyways. There is no way to set it reliably at all, if you're trying to hold a hot tub tempt steady. Overall this is a good value, but definitely has some issues.
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Reviewed in the United States on August 13, 2025 by B. Wallace
Works great, heats up real fast.
Work great to heat up a redneck hot tub, Update one and a half months and it quit heating, waiting to hear from seller. Very disappointing, it worked so good to start with. The manufacturer needs to fix the flow switch issues and upgrade the thermostat.
Reviewed in the United States on January 19, 2022 by Kyle Outdoors
Works for me (Hints if it will work for you)
I used this in conjunction with "Key Lander Hot Tub Spa Circulation Pump; 48Frame LX Motor" pump. the inlet and outlet is 3/4 in AND it is just enough water flow to activate the heater. YES. There is a minimum flow and the pump above is what is needed. It is barely enough (going through 3/4 ingress and egress). If the filter get clogged, the heater will NOT turn on. We are using the pump and heater above to replace the all in one unit for the inflatable intex hot tub. It works great with some PVC pipe and fittings and the existing hotub. I use a thermostat (arduino microcontroller) to turn the pump on and off, which in turn turns on the pump when the temperature is too cold, and turns the pump off when it is at the right temperature.
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Reviewed in the United States on January 25, 2021 by M. J. Sears
Does not maintain water temperature and trips circuit.
Despite ad spec info listed on Amazon saying that the heater was for pools and hot tub spas (most of which are outdoors), one of the instructions that come with the water heater says "For Indoor Use Only". The headline above the instructions for the product note as a Whirlpool Bathtub Heater, not for pools and hot tub spas. However this statement not only contradicts the use and spec information provided in the ad for the Amazon listing, the Basic Requirements & Troubleshooting instructions provided for the product show illustrations for proper hookup to an outdoor hot tub. The only assumption here is that perhaps the heater could be used for both a whirlpool tub and a hot tub. It is supposed to work on a dedicated 110V electricity line with a 20amp circuit and an GFC outlet (all of which are my setup). It also states that it is suitable for up to 450-500 US gallons (my hot tub capacity is less than 200 gallons). And it should function up to 40 degrees centigrade (104 degrees Fahrenheit). However the heater trips the circuit if setting near the max temperature dial and only reaches barely above average body temperature. It then begins to drop its temperature within a couple days to well below average body temperature, never regaining even its highest temperature and eventually quits heating. In addition, the Reset button for attempting to restore proper heating functioning does not work. It does not press in as instructed and shown in the instructions. Finally, the only option offered for return and replacement provides a lot of room for the manufacturer to claim improper installation AND the only way provided for communicating with the manufacturer is via a line that says, "feel free to contact us by E-mail". However, no email address is provided. Safe to say this was a very disappointing purchase with no apparent way to get a refund or replacement.
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Reviewed in the United States on October 3, 2021 by Amazon Customer