VEVOR Water Heater fit for Thermostat 3KW 220V Electric Water Heater fit for Thermostat for Max 528 Mini Gallon Swimming Pool and SPA Swimming Pool fit for Thermostat Automated 48mm Interface

1yr UPDATE.......It's now 14 months later, and this little heater has kept my hot tub at temperature for over a year now. At the price I paid, which is 10% (or lower) of a 'standard' hot tub heater, that's a big win for me. I'm ordering a second "spare" unit now, just to have for a backup in the event of a future failure. It's a 10 minute replacement. At a little over $100 / unit, you just can't go wrong. If I had to buy one every year, I'd still come out ahead.I don't understand the difficulty with installation. Just wire to 220V, cut the PVC line, glue the PVC threaded Joints on, and screw the heater in place. Simple. The internal flow control works great - the pump turns on, and the heater turns on. The only issue I have is that the rubber washers tend to drip, and I can't seem to stop that. I get it stopped and as the water heats up / cools off, it drips again. Bummer, but no big deal. It's outside in the elements, so I covered it with a cheap plastic tool box that I bought, just to keep the rain off it. It's working great. And I haven't been paid or given any incentives to write this. I got a few 'mainstream' HotTub heater quotes before going this direction, and they came in at a thousand or even two! They like heat faster, but if you keep your HotTub at temperature all the time, as we do, then it's not a concern. I run my pump on a 2 hour on/off cycle so it's always hot. This is a simple resistive electric heater element similar to a water heater. Good Product.Original Review ------------I am VERY pleased with this purchase. It's a great find. I'm disappointed to see that it's not currently available at the time of this review.I have a custom-built hot tub that needed a heater, since I wanted to move the original large heater (100k btu) to our swimming pool. I found this, inserted it in the PVC line right out of the filter, connected the 220vac, and it works great! Simple installation, GREAT price. Since it's outside, I simply mounted it inside a plastic tool

The price for this water heater is resaonable and it helps to warm up my pool tank with good amount of time.I will buy this again if I need to. It is consider easy to install.

Our spa quit working and we discovered it was the heater. We found this heater and it was exactly what we needed. It was easy to install and works perfectly going on 6 months now and we have had no issues. Excellent product.

Great product and heated my spa within 3 days

bought to supplement heat in a 150 gal inflatable hot tub for hydro therapy. heats the unit up from 70 degrees to 104 in 2.5 hrs. was easy to install. works as it should is user friendly. its my opinion happy buy provides quality products at affordable prices. very happy with this unit has met and exceeded my expectations. have no complaints think this is a great product from a excellent company. hope you have good luck in your purchasing experience. i have full confidence in my recommendation of this product as long as it fits the parameters of your application.thanks happy buy -AG

I am VERY pleased with this purchase. It's a great find. I'm disappointed to see that it's not currently available at the time of this review.I have a custom-built hot tub that needed a heater, since I wanted to move the original large heater (100k btu) to our swimming pool. I found this, inserted it in the PVC line right out of the filter, connected the 220vac, and it works great! Simple installation, GREAT price. Since it's outside, I simply mounted it inside a plastic tool box (holes at each end) to keep it dry if it rains.The heater turns off when the flow is off (you can see from the indicator light) and right back on when the flow comes back. And, of course, it turns off when it reaches the preset 'knob' temperature. So, my pump timer controls both the pump and the heater, and the tub is hot when we want it to be.It's not super fast, of course, just like every other heater of this "in-line" type used on all my previous fiberglass stand-alone hot tubs. So, it takes a few hours to get up to temperature if you let the water cool off. But we don't care, because we keep our tub hot year round. A well insulated tub with a good cover can stay hot with little noticeable impact on the electric bill.The temperature control knob doesn't show the temperature in actual degrees, so you need to use the tub a time or two and adjust the knob to your preferred temperature. But that doesn't really matter since every thermometer is different anyway, so adjustment is always necessary. Even with the fancy digital temperature readout on my big, expensive pool heater, it still required a few adjustments to get the water just right.Not sure yet about longevity. But the price is so good that if it fails a year or two down the road, replacing it will be quicker and less expensive than getting a larger unit repaired.