SEAFLO 42 Series 12V 3.0 GPM 55PSI Continuous Duty Diaphragm Pump with Bypass for Reduced Cycling, Fresh/Salt Water, 4-Year Warranty, UL & CSA Certified, Self-Priming for Marine, RV, Off-Grid, Boats

The media could not be loaded. SO QUIET! I used to have the Seaflo 21 Series, but it was like a jackhammer. This 42 series is ridiculously quiet. Make sure you adjust the bypass setting, I had to turn it clockwise for a while till it got butter smooth at all my flow speeds. My truck camper's faucet is now nearly silent... the sound of the water itself in the sink is probably noisier than the pump itself! I originally hoped to save 3 lbs of weight with the 21 series, but you have to get the 42 series!

Great product.I'm using it on an 8 row agricultural sprayer and it works very well.

Good pump for the money

The first pump I received was defective. So far the second one is working well. I paid a marine mechanic to install the first, and I installed the second. Easy to install, quiet, with enough pressure.

Quietest pump we’ve used yet. Third pump we’ve installed over the life of our travel trailer. Will buy this again to have as a spare.

Nice and quiet with variable flow rate.I installed this with an accumulator on my last build, probably not necessary with this unit as it is able to vary flow rate rather than full on/off of other units.I will use this again on my next build without an accumulator and report findings then.

I don’t typically leave negative reviews, but this could literally be life or death for someone and I feel a responsibility to inform anyone who may be relying on this for potable water, or any situation where the products failure could be catastrophic.Sure it is quiet, inexpensive, good psi, boasting low flow capabilities and an impressive warranty (granted I still needed to install an accumulator tank because mine still cycles, and people have reported they don’t honor their warranty) - but the pressure switch on this has caused catastrophic issues for many people (just search YouTube); as far as draining freshwater tanks out at sea due to melting the plastic water joints (not to mention potentially starting a fire).Well, its not a myth. I’ve pumped maybe 100 gallons simply to test the water system I installed in my sprinter. Worked great, so I thought maybe those people had it in too humid environments for too long and that caused the issue (still shouldn’t happen on a water pump, but ok you get what you pay for).Well, brand new pump… Dry location… Still returnable to Amazon… It seemed to work fine so I took a trip (I’m still on the trip trying to get a new pump sent to me on my way).First night (last night), it started shorting out when it reached pressure, just as it has been cautioned in the videos I have watched. It shorts enough to make an electrical short crackling sound and make the lights in the van flicker while the pump rapidly cycles on and off, but not enough to trip the fuse. Plus it still pumps water… for now…As such, I can certainly understand how if this was out of observable range (acoustically or visually), and not tampering with sensitive lighting dimmers (different circuit, non-isolated, same power source), one would not necessarily know that it’s shorting out until it’s too late and has melted itself, and potentially the connected plumbing (which is how this has unknowingly drained freshwater tanks at sea)…Thankfully I’m still under Amazon’s return window (yes it’s that new), and they will honor the return, otherwise I’d have to deal with the seaflo warranty that they don’t seem to honor (read reviews of them delaying by months, or going MIA, or even going as far as just telling people to just bypass the pressure switch and keep the faulty unit).I decided to buy a higher quality pump for peace of mind. And I’m not even out at sea. But the possibility of a fire? Or suddenly draining the freshwater tank into my van? Perhaps while 5 days out into the desert?Nope.It’s a known issue and simple fix seaflo. You could literally be the cause of someone’s demise for not just fixing this issue. It’s not just inconvenient; it’s potentially someone’s life if they are weeks from land or way off grid.Buyer beware.

Works great and is a lot quieter than the Surflow pump it replaced!