SEAFLO 55-Series Diaphragm Pump - 12V DC, 5.5 GPM, 60 PSI with Heavy Duty Pressure Switch | Self-Priming, Quiet Operation, 4-Year Warranty | Ideal for RV, Marine, and Off-Grid Water System

Amazingly quiet and able to run continuously for 2hrs without overheating. Lightyears ahead of generic models. I used this in conjunction with a portable heater to heat up a 700gal stock tank. Handled 110 degree water with no issues either. I used a 300W waterproof led transformer to power it.

I had an Amarine Made pump almost identical to this one, and it worked great, for awhile. The pump, just like this one pushes out a lot of water and the pressure is excellent (requiring the use of a 40psi regulator on my travel trailer to use this pump. The big difference is in the pressure switch. This pump has a much larger pressure switch to turn the pump on/off on demand than the Amarine Made pump. The switch on the Amarine Made pump failed after only a few days of use while boon docking. This isn't uncommon as even SeaFlo users have reported the same issue with the look-a-like version of the Amarine Made pump. However, only SeaFlo offers this pump with a better switch. I'm going one step further and adding in a 30 amp relay switch, so the 12v SeaFlo switch will activate a 30 amp relay which will turn the pump on and off as needed. This'll ensure that the switch on the pump will last a very long time since it'll have only mA instead of 8 to 17 amps going through it. The pump is a bit loud but it's inside of a shed at my camp site so I don't hear it. If I were to place it in my RV, I would box it with hard Styrofoam to reduce the sound when the pump runs. The only drawback I have with the SeaFlo pump over the Amarine Made pump is that the Amarine Made pump has removable in/out nozzles. I can swap screw type for push on hose type nozzles. The SeaFlo doesn't offer this and has fixed screw on type connectors. I'll have to build adapters as needed. Overall though the pump does what it's supposed to do and does it much better than the Amarine Made (which died due to pressure switch failure), and smaller pumps that I've tried to use. I like the output of this pump.

Not quiet, but none of them are. The bypass valve system reduces cycling so I like that. Easy to replace old pump. I liked it so much I bought another one for backup and have kept the second one in the box for 2 years! The power is much better than OEM, but still drops noticeably with more than one faucet opened.

P.O.S. (piece of skītaną)Offered "repackaged" for a few dollars less. I paid for new. Recieved a retaped box anyway. Installed it and powered it. Ran great! Reached pressure and cut off. I was relieved. Kept working on other projects listening for it to restart if the system had a leak. It didn't (I thought). Turned power switch off when I left. Next day turned it back on and it didn't come on. Great, it kept pressure overnight! Right? Turned on shower, and no water. Fuse is before power switch, and the light was on, so it had power to it. I had made the mistake of trusting them, and put it in an awkward spot.Got to it and pulled the little cover for the off. Black lead to boat frame (aluminum) and checked top of switch. 12.4 VDC. Checked bottom 0 VDC. Switched to Ohms and had continuity. So motor looked good. Grabbed minor alignment tool (6" adjustable wrentch) and did an attitude awakening..... it started working! Heard water in shower. Turned off shower and waited. And waited. And you get the idea. It noticeably slowed down. Had another discussion with switch and it stopped. Ran water and it came on! Turned water off and it kept running. And running. Shut off power. This is a long way of saying what a few others have already said. "They can make pumps, but not pressure switches".

I purchased 2 of these pumps, the first on 12/20/20, the second in August of 21. They seem like great pumps to start.In August, the first pump began having an issue where is cycles on and of rapidly, with no reason... no faucet open, no air in lines... I purchased the second one to replace it, intending to have the first warranty repaired. So, I would have a spare for future use if ever needed.Less than 4 months after getting the 2nd, it began having the exact same issue.I called the help-line... the guy told me he would send me a couple of new switches. (So, I must be a qualified repair technician? I work HR.)That was 3 weeks ago. I emailed the reciepts, along with the description of the issue... I get no response. I emailed, asking specifically for a response so I know I'm not being ignored... no response. I've called the help-line 6 times since the first call and can only leave a voicemail.The warranty on the first one expires in less than 10 days. I'm calling the BBB.Update, 3/4/2022: I found someone to put the switches on both pumps, put one back in service. It works, but is still cycling. The guy, Frank H. keeps telling me there must be a leak somewhere and won't honour the warranty. I've had someone crawl around under my house, look for leaks, check the power source for voltage... nothing is wrong. I'd like my money back so I can go with a different company. This pump is faulty and they won't honour their extended warranty.