Replaced Original Fresh Water Pump! HUGE difference in noise and vibration

Howdy folks - just thought I'd share a successful equipment update.

Our FW pump has tended to sound like something in between a giant woodpecker and a jackhammer since we've owned the boat these last few months. After scanning the forum and researching options, we went with a pump swap out.

I installed the SEAFLO 42 Series pump today (Amazon $65). Install went great. I pulled the original pump out (noticed that the original pump was mounted on some open cell insulation that had been compressed to the point it wasn't doing anything).

Applied the sound deadening pads and then installed the SEAFLO. Other than having to clean up the water and work at an odd angle below my backside, was straightforward.

Results are astounding. When the pump runs we can JUST BARELY detect a motor sound. In fact, it's masked by the sound of the water running in the sink(s).

Hugely impressed, I was skeptical this would make that significant a difference, but its night and day.

Enjoy!

BOSCBIJI said:

Howdy folks - just thought I'd share a successful equipment update.

Our FW pump has tended to sound like something in between a giant woodpecker and a jackhammer since we've owned the boat these last few months. After scanning the forum and researching options, we went with a pump swap out.

I installed the SEAFLO 42 Series pump today (Amazon $65). Install went great. I pulled the original pump out (noticed that the original pump was mounted on some open cell insulation that had been compressed to the point it wasn't doing anything).

Applied the sound deadening pads and then installed the SEAFLO. Other than having to clean up the water and work at an odd angle below my backside, was straightforward.

Results are astounding. When the pump runs we can JUST BARELY detect a motor sound. In fact, it's masked by the sound of the water running in the sink(s).

Hugely impressed, I was skeptical this would make that significant a difference, but its night and day.

Enjoy!

Click to expand...

After 6 years, our factory OEM pump finally starting making loud noises when operating.

I just upgraded ours to the SeaFlo 43 last weekend.

I just replaced mine for the same reason with a Marco UP3/e. Not as quiet as the Seaflo but a massive improvement. Not so simple as I expected: my C26 pump is located under copilot stairs forward of fridge; pulled the fridge & installed a 4" inspection port as there's but 5" of access against the hull; still not enough room - wound up doing it from below (pull a monkey fur panel from port/forward cave). Hoses were 5/8 ID braid, Marco is fem threaded with 3/8 BSPP thread - pump came w/o hose barbs, only available direct 3/8 BSPP to barb is for 1/2" ID hose. Had to bridge 1/2 with a reducing union. Installed a pseudo-accumulator (2 yards of braided hose on the output). Installed a smart-things water detector below the pump & output tee (reports thru BRNKL), used the occasion to mount a Ruuvi directly against the potable tank (reports thru Cerbo GX). One thing leads to another... galley faucet has been leaking, replaced with similar (Ambassador Stasis) model, piece of cake. One more water detector - done. Had a worse time with a dead macerator: direct replacement showed up with a figure-eighted o-ring, assembler had attempted to tighten to spec neatly slicing the o-ring in 2 places and leaving the outer gasket loose. I didn't notice it until installed and leaking profusely. Wait for a fixit kit... rip it out & replace gasket & o-ring... reinstall. In the process discovered there's no filter in the vent (order/wait/installed Big Orange), the blackwater tank threaded/gasketed 3" lid is split (order/wait/install), and the vent barb is located at the top of the aft wall of the tank (daft, invites contamination of the vent line). One last step remains - seal off that barb and install a Vetus port/vent atop the tank.

/Diatom

Submariner said:

After 6 years, our factory OEM pump finally starting making loud noises when operating.

I just upgraded ours to the SeaFlo 43 last weekend.

Click to expand...

Did you need any new parts or adaptation?

We did everything we could to make the stock pump quieter for a few months but ended up replacing it with the standard Seaflow like yours shortly after buying our new R27.

Beyond me why FM would equip the boat with that pump. For the sake of $20 it was an ill researched choice.

I just replaced the stock FWP on my 2025 R-29 CB with this little unit. I LOVE it. Super quite and the pressure is great now. (4.0gpm.) I took the opportunity to reposition the pump to make it a lot easier to access the strainer. The original pump failed because there were so many plastic shavings in the strainer and the suction line. (Most likely from drilling and tapping the access holes in the tank.) It was totally compacted and we only had a trickle of water, I'm surprised we even had that. The strainer was very difficult to access because they had jammed the pump way in the corner of the space , not sure why because there is plenty of room in there.

OverTime said:

I just replaced the stock FWP on my 2025 R-29 CB with this little unit. I LOVE it. Super quite and the pressure is great now. (4.0gpm.) I took the opportunity to reposition the pump to make it a lot easier to access the strainer. The original pump failed because there were so many plastic shavings in the strainer and the suction line. (Most likely from drilling and tapping the access holes in the tank.) It was totally compacted and we only had a trickle of water, I'm surprised we even had that. The strainer was very difficult to access because they had jammed the pump way in the corner of the space , not sure why because there is plenty of room in there.

Click to expand...

That thing needs a red racing stripe or a yellow lightning bolt on the side of it. Looks sleek! 😎

BOSCBIJI said:

Howdy folks - just thought I'd share a successful equipment update.

Our FW pump has tended to sound like something in between a giant woodpecker and a jackhammer since we've owned the boat these last few months. After scanning the forum and researching options, we went with a pump swap out.

I installed the SEAFLO 42 Series pump today (Amazon $65). Install went great. I pulled the original pump out (noticed that the original pump was mounted on some open cell insulation that had been compressed to the point it wasn't doing anything).

Applied the sound deadening pads and then installed the SEAFLO. Other than having to clean up the water and work at an odd angle below my backside, was straightforward.

Results are astounding. When the pump runs we can JUST BARELY detect a motor sound. In fact, it's masked by the sound of the water running in the sink(s).

Hugely impressed, I was skeptical this would make that significant a difference, but its night and day.

Enjoy!

Click to expand...

How does the bypass work? I couldn’t find a description on the Sureflo website?

Chimo said:

How does the bypass work? I couldn’t find a description on the Sureflo website?

Click to expand...

NO idea...and to be clear, this isn't an accumulator solution where water is stored and distributed for short duration use. The pump seems turns on for any water use, just like the OEM...but its 90% quieter.