bayiteBYT-7A014 DC 12V Solar Hot Water Heater Circulation Pump Low Noise 3M Discharge Head 2.1GPM

Update 10/10/23: the fifth pump is now oscillating and the flow is diminished. I’m ordering a new one. I run these pumps less than 15 minutes every other day or so on average and as you can see I get 2-3 years out of one. No way that’s 30,000 hours but they’re still nice cheap pumps.Update 12/31/21: the fourth one started having shaft oscillation in the cheap nylon bearings after about 6 months, it’s now 18months and it’s still running but getting progressively worse. When this happens the pump efficiency drops and it moves less water. I’ll put up with it a while longer and probably buy a fifth one by summer.Update 7/31/20: finally replaced ithe third with the fourth one of the same.Update 6/22/20: The third pumps impeller shaft is now oscillating in it’s bearings all the time, still pumping fine though.Update 10-5-19: I’m still using the third pump almost daily. I rebuilt my heat exchanger from 1/4” copper to 3/8” copper and what pump noise there was is now completely gone. The entire system is now 3/8in which is what’s recommended, I suggest you follow this and also don’t put impulses thru the impeller from a downstream pump. Restoring 5 star rating.Update 8-19-18: the second pump failed after about 200 hours run time when the plastic bearings wore out allowing the impeller to oscillate loudly. I have one more of these on hand and will report back when it fails.Update 1-22-18: the second pump has survived 40 hrs run time circulating water up to 125f. It's gotten slightly louder but is still running smoothly. If it fails I'll replace it with a similarly priced US Solar pump that employs ceramic bushings.Update 12-25-17: it's possible my installation caused this failure. The nylon bushings are worn oblong which could have been caused by drawing water through this pump while its unpowered by a downstream diaphragm pump, from the same vendor, which generates significant pressure pulses. I've restored my 4star rating until the third pump (identical replacement) I bought either fails or doesn't now that I've rigged a separate draw for the diaphragm pump.Update 12-22-17: the pump which I used to circulate water through a heat exchanger has worn out after less than 30 hours run time. This caused a loud vibration inside the pump. Water temp was 50degf to 125degf with zero head.The plastic impeller rides on a metal shaft without any bushings so they just wear out quickly. I've replaced it with another one exactly the same and will update in a month or so if it wears out as well. I expect it will. It would probably be fine if only used intermittently.Original 5 star comments:I used this for an off grid shower. Mounted a 3gal solar shower bag above it with an air hose quick coupler to allow the bag to be removed and refilled. The pump must be immersed so mounting it below the level of the bag lets water flow through the pump and partway up the discharge hose. That primes the pump.The 10mm fittings will take 3/8in hose. Reduction fittings step down to the pump and then down to 1/4in hose up to the shower head from the bag.Splice in a linemaster foot switch and voila, nice 12v shower system.Note: this design was changed from a shower bag to a 3-gallon plastic cooler in 2017. The pump is submerged in the cooler and air hose couplers connect it thru the lid to the heat exchanger and shower pump. This pump is now used only to circulate through the heat exchanger.

Edit: The pump failed in the warranty period. The seller replaced the pump promptly and with no hassle. Keep an eye on this pump and keep an extra ready to be swapped out. The Customer Service I received makes me confident in recommending this pump for an inexpensive solution to less important tasks.I am using this in a Chicken Nipple waterer setup and it has been working good. It is setup as per the instructions (at the bottom of the barrel) because it is not a self-priming pump. It is all plastic and isn't the quality or price of expensive cast iron circulation pumps. We have backup solutions in case of failure, but this has made our lives easier by allowing us to put together a better clean water system without substantial cost.

Great little low pressure pump to move fluid. In my case I am using it to remove the distilled water/ isopropyl alcohol solution from the bottom of an ultrasonic tank, pass it thru a 10 micron filter and send it back to the tank. This filters the solid matter from the solution, extending its operational life.

It worked, havent put a real world conditional test to it yet, but it functions as promised.Its also pretty heavy, thats a good thing. It looks and feels well crafted. Hope this helpsRetired bench tech, Montana.

This pump ran long enough to get past the 30 day amazon return policy. The description says it is a submersible but I believe water entered the casing maybe through the wire entry. I am actually speculating as to the cause of the failure. At any rate, I got maybe 3 months out of this pump before it failed. I checked the vendors web site and I seen nothing about warranty. So basically, they don't warranty their products and provide no way to communicate with them. That's just not the type of company I want to deal with.

Unit has cable connected to the pump but does not have female connector/cable to connect to DC source nor are there any instructions as to whereto get cable or part number for this connector/cable

I use this pump to circulate hot water through a radiator for my custom 7 gal overland camper shower. I have used it three ways: above the water tank and primed by a larger pump, at the base of the water tank where it self-primes, and completely immersed inside the water tank. It only works reliably when completely immersed. However, in this configuration it is a rock-solid little pump for the money (And they are cheap enough that you can keep a spare on hand). It pumps about 1.5 gal/min through a radiator (In which the water channels are more-or-less equivalent to 20 feet of 1/4 inch tubing) with 2 ft of head. It works well with intermittent use of around 1 hour per day in water not exceeding 110F. I highly doubt this pump will be reliable if run continuously or not fully immersed, as it does not have bearings, just water-lubricated plastic bores that directly contact a ceramic shaft. It is extremely sensitive to downstream pressure fluctuations, so I recommend using it only as a circulation pump on an isolated circuit!Take this pump for what it is, and use it in a setup similar to mine, and you should have a good time.

Nicely made, the impeller is magnetically coupled to the motor, and the motor is sealed, so it is submersibe, and there isn't a shaft seal to eventually leak. It's advertised as 2.1 gpm, but when I tested it against about 4' of head, it only made about 1 gpm. Nevertheless, it works well to transfer water from a 30 gallon bladder into my RV (it took 30 minutes to empty the bladder, but that is not a problem for me.