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Seaflo Accumulator Tank for RV and Boat Water Pumps - 0.75 Liter
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Seaflo

Seaflo Accumulator Tank for RV and Boat Water Pumps - 0.75 Liter

Part Number: SE38FR
38 Reviews | 21 Questions
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$46.50
Retail:$91.48
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seaflo rv water pump 10 psi
seaflo rv water pump 10 psi se38fr
seaflo rv water pump accumulator tank for and boat pumps - 0.75 liter
seaflo rv water pump se38fr
seaflo rv water pump accumulator tank 10 psi se38fr
seaflo rv water pump accumulator tank for and boat pumps - 0.75 liter
seaflo rv water pump accumulator tank
seaflo rv water pump se38fr
seaflo rv water pump accumulator tank for and boat pumps - 0.75 liter
seaflo rv water pump accumulator tank for and boat pumps - 0.75 liter
seaflo rv water pump accumulator tank 10 psi for and boat pumps - 0.75 liter
seaflo rv water pump accumulator tank
seaflo rv water pump accumulator tank
seaflo rv water pump 10 psi se38fr
seaflo rv water pump accumulator tank
seaflo rv water pump 10 psi se38fr
seaflo rv water pump 10 psi se38fr
seaflo rv water pump 10 psi

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Conserve battery power and help your pump last longer. This accumulator tank reduces cycling of your pump system, making it quieter by allowing the pump to reach shut-off pressure more smoothly. Internal rubber membrane is maintenance-free. Great Prices for the best rv water pump from Seaflo. Seaflo Accumulator Tank for RV and Boat Water Pumps - 0.75 Liter part number SE38FR can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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Seaflo RV Water Pump - SE38FR

  • Accumulator Tank
  • 10 psi
  • Seaflo

Conserve battery power and help your pump last longer. This accumulator tank reduces cycling of your pump system, making it quieter by allowing the pump to reach shut-off pressure more smoothly. Internal rubber membrane is maintenance-free.


Features:

  • Helps produce a smooth, controlled, uninterrupted flow of water in your RV
  • Pushes water through pipes before initiating the pump
    • Allows enough water flow to let you flush at night without waking others in the RV
  • Decreases battery drain by reducing on/off pulsing cycle
  • Reduces noise by allowing your pump to reach shut-off pressure more smoothly
    • Semi-rigid rubber feet also reduce noise caused by vibration
  • Made with a maintenance-free internal rubber membrane
  • Mounts downstream from your pump
    • Compact enough to fit in small spaces
  • Connects to standard NPT connections
    • Includes hose barb fittings for 1/2" hoses


Specs:

  • Overall dimensions: 7-7/8" long x 5" wide x 4-1/2" tall
  • Mounting hole spacing (center to center): 4-1/8"
  • Capacity: 0.75 liter
  • Maximum pressure: 125 psi
  • Pressure pre-charge: 10 psi
  • Flow: 125 gallons per minute (GPM)
  • Ports:
    • Inlet: 1/2" male NPT
    • Outlet: 1/2" male NPT
  • Weight: 1 lbs


SFAT-075-125-01 Sea Flow Accumulator Tank for Marine and RV Water Pumps - 0.75 Liter







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Customer Satisfaction Score:

Ratings & Reviews

4.8

38 reviews
5 Stars
(33)
4 Stars
(4)
3 Stars
(0)
2 Stars
(0)
1 Star
(1)
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by:
Changed from the factory installed Sureflo to this Seaflow, made a difference quieting the pumping noise and smoother water flow. The accumulator in combo is a must.
by:
Easy to install. Does what it is supposed to do. Makes pump quieter and keeps pumping from hammering. Levels out low flow water flow.
by:
Installed with new sea flow 42 pump great pressure nice and even unbelievably quiet
by:
Worked great to quiet my water pump.
Kurt profile picture

Kurt

5/5/2026

Pump is working great! It is much quieter than the one from the factory. Glad I replaced it.

by:
This accumulator is a great value. I had installed similar (more costly) accumulators on my 30ft sailboat and in my other camping trailer. The etrailer video incorrectly instructs to set the charge pressure to 3 psi. This is a mis-read of the labeled instruction on the unit which states to pre-charge to 3 psi less than the pump cut-in pressure. I set my pre-charge pressure to 37 psi for my 40 psi cut-in. I found this too much. After experimenting with a few other settings, I settled on 20 psi pre-charge which provided the minimum amount of pump cycling when running the kitchen sink faucet at various flows.
Jenny N. profile picture
Etrailer Expert

Jenny N.

3/1/2022

I reached out to the manufacturer and the tank does com pre charged to 10 PSI. It can be adjusted up or down using the schrader valve and a bicycle pump. I recommend viewing our second video which I have linked below.

Helpful Links

tv-Demo-Seaflo-Boat-Accessories-Accumulator-Tank-SE38FR.aspx

by:
We purchased this tank for our Little Guy Mini Max camper. Prior to installing this accumulator, the Shurflo 4008 pump cycled frequently, was noisy and the water flow pulsated. This accumulator reduced cycling and eliminated the pulsation. Adding flexible hose between the fresh water tank, the pump, and accumulator reduced the noise a lot. This Seaflo tank appears more solidly built than other similar models offered by other manufacturers. The only reason for not giving it 5 stars is that the included hose fittings appear to be low quality. They were replaced with higher quality fittings to avoid leaks.
by:
Easy to install, pump runs smoother and less frequently.
by:
Installed this in my camper hoping to stop the floor-shaking judder when running the faucet at lower flows. This helps but only at low flow. I suspect it’s ~8 oz of drawdown at 40/50 psi, so every cup of water that comes out kicks the pump back on. A 1 or 1.5L would be a better choice.
by:
After some problems with usps, etrailer really did a great job of getting the problem solved and getting my item delivered. I am very impressed with the customer service at etrailer. Happy customer I am. I will not hesitate to order from them again.
by:
This thing is a great upgrade to our RV. Our water tank and pump is directly under our bed. It was very noisy and pulsating constantly. This tank made it almost completely quite and the pump has a longer draw down before cycling. Excellent product and I have recommended it to others.
by:
It helped quiet the water system. Made the system work better! I subtracted one star for the fittings, they both leaked! A small o ring in the fitting fixed the leaks!
by:
Used as a replacement for original connector that didn't have a positive fit. This one clicks in and provides confidence of a snug fit.
by:
Works good. Pump runs less often and makes less noise.
by:
So quiet I couldn't hear it running with my music playing.
Hobob profile picture

Hobob

10/18/2023

A year after installation Im still pleased with the pump. Quiet, efficient, and dependable. Im a weekender so its not in constant use.

Mike L. profile picture
Etrailer Expert

Mike L.

11/8/2023

@Hobob Great to hear that, thanks for checking in!
by:
Works great! As it should!
Teri profile picture

Teri

5/13/2023

Great. No problems

by:
Works great, wish i had installed it sooner.
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Works great!
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Show More Reviews

See what our Experts say about this Seaflo RV Water Pump

Do you have a question about this RV Water Pump?
  • Troubleshooting A Fogatti Tanjless Water Heater That Goes Cold But Doesn't Have An Error Code
    If the hot water from your Fogatti RV Tankless Water Heater # LSB64FR is fading back to cold it could be for the following reasons: If you have a lack of lp gas pressure the unit won't be able to keep up. Typically you would get an error code with this. Since you're not it leads me to believe that it's either a water pressure issue or electrical issue. Check the water pressure at the unit to ensure it's getting around 40-50psi so that it can keep up with the demand at the point of use...
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  • Can SeaFlo Accumulator Install Between Pump and Water Filter
    Hey Rhonda, in order for the Seaflo Accumulator part # SE38FR to function properly it needs to install right after the water pump and not after a water filtration system
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  • Parts Needed to Fit Seaflo Accumulator Tank and Seaflo Diaphragm Pump Together
    Hey Matt, thanks for reaching out! I've done some searching but I'm not finding a specific kit to connect the Seaflo Accumulator Tank # SE38FR and Seaflo Diaphragm Pump # SE57FR together. With that being said, we do have an installation video I've linked to this page, and in that video, Adam uses the following parts to fit the two pieces together: - Valterra PTFE Thread Seal Tape # A05-0265 - Derale Stainless Steel Hose Clamps # D13008 - Valterra PVC Tubing # W01-1600PB Do you think...
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  • Is An Accumulator Tank Needed For The Excel RV Tankless Water Heater
    The need for an accumulator tank like the Seaflo Accumulator Tank # SE38FR with the Excel RV Tankless On-Demand Water Heater # EX93FR would depend solely on the pressure of your water pump. This water heater requires a water pressure of 2 psi up to 120 psi to properly function. It has an operating waterflow of 1.6 gallons of hot water per minute. A pound of propane has 21,591 BTU, so with the Excel burning at 38,000 BTUs you would multiply 21,500 by the size of the tank (4gal) and divide...
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  • Can I Install the Seaflo Accumulator Tank with my Water Hater?
    Hey Keith! Thanks for reaching out again! The Seaflo Accumulator Tank # SE38FR can help stabilize water pressure and reduce temperature fluctuations with tankless water heaters, but I wouldn't recommend installing it directly on the hot water outlet of your Girard water heater. The accumulator works by storing a small amount of pressurized water and releasing it as needed to maintain a steadier flow. It doesn't actually circulate water back through the heater or keep the water in your...
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  • SE57FR Pump and SE38FR Accumulator Tank Pressure Adjustment
    Hi Rich, that's common and has an easy fix! Since your part # SE38FR was still at the factory 10 PSI, that is most likely why the pump is coming on almost immediately. The 10 PSI is simply the accumulator’s factory air precharge, and it needs to be adjusted to match the pressure range of your new SE57FR pump. The SE57FR typically turns on around 30 PSI, so we recommend setting the accumulator to about 28 PSI. With the pump turned off and a faucet open to relieve the water pressure, adjust...
    view full answer...
  • I Just Replaced My SEAFLO Pump So Do I Need to Recheck the Accumulator Pressure?
    Hello Todd, Nice job upgrading your setup with the SEAFLO # SE57FR pump and the # SE38FR accumulator, that’s a solid combo. The accumulator tank comes pre-charged to about 10 psi from the factory, but it’s really important to check and adjust that pressure whenever you replace or change your pump. That’s because the correct pre-charge depends on your pump’s pressure switch settings, basically, when the pump turns on and off. Your # SE57FR pump typically kicks on around 30 psi and shuts...
    view full answer...
  • Are Any of the Fresh Water Tanks Rated for Pressure?
    That’s a great question, and it’s one that trips a lot of folks up when they start working on their RV water systems. None of the fresh-water tanks we carry on etrailer are pressure-rated. They’re what’s called “atmospheric” tanks, which means they’re only designed to hold water, not to be pressurized like a home plumbing tank or air tank. If you were to pump 20–30 psi directly into one of these tanks, the walls would actually start to bulge or crack because they’re not reinforced to...
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  • RV Water Pump and Accumulator for a Quieter Water System
    Thanks for the picture! If you have the space I would absolutely recommend going with an accumulator tank to take the pressure and stress off of your pump. The Seaflo Accumulator Tank for Marine and RV Water Pumps - 0.75 Liter item # SE38FR would be a great addition to your set up it will trap and absorb water and air in the tank which lessens the noise. This accumulator will work well with the HydroMax RV Fresh Water Pump - 12 Volt - 3 Gallons Per Minute - 55 psi item # P25201 you referenced....
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    Image 1 for
  • How Often Should You Check The Pressure Of Your Seaflo Accumulator Tank
    Sorry for the delay, I wasn't getting any word back from Seaflo until today. Their rep recommends checking your Accumulator Tank # SE38FR quarterly. Seaflo's Accumulator tanks have a small air bag inside of them that can lose pressure over time causing the pump to have work harder. There is an air inlet (pictured below) that you can hook a standard bike air pump onto to increase the pressure inside of the airbag.
    view full answer...
  • Troubleshooting City Water Low Pressure At A Campsite
    The Seaflo Submersible Utility Pump for Boats and RVs # SE54FR is a water pump and is designed for short intermittent use so it wouldn't really increase the pressure for your RV how you're needing it to. You would instead need to install a higher GPM and PSI rated water pump than what you currently have and/or an accumulator tank like the Seaflo Accumulator Tank for RV and Boat Water Pumps # SE38FR to increase the pressure. If you're running off of city water pressure from the campground...
    view full answer...
  • Do Brands Matter When Installing Accumulator Tanks And Can Multiple Be Used Together
    Brands don't matter when it comes to installing the Seaflo Accumulator Tank for RV and Boat Water Pumps # SE38FR or any other accumulator tank. You could install multiple accumulators but you wouldn't really see a benefit from it unless you moved them closer inline to the point of use (shower, faucet, etc.).
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  • Accumulator Tank Mounting
    Per the manufacturer The Seaflo Accumulator Tank # SE38FR the tank can be mounted horizontal or vertical, whatever gives you the most room to mount. I attached a review video link below.
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  • Troubleshooting Weak Water Pressure With A Dometic RV Water Heater
    If the pressure builds up and then slows down to just a small stream then you most likely are not getting a high enough pressure for the Dometic RV Water Heater # DMC74FR to properly function. It's getting enough water to fill the tank, but not enough to keep it full and handle the demand from the running faucets. This could be caused by a clog in the line, like you were thinking, or a bad water pump if you aren't using city water. On most RV water pumps there's a little adjuster screw...
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  • Are Barbed Fitting Adapters Included in Seaflo Accumulator Tank for Marine and RV Water Pumps?
    The Seaflo Accumulator Tank for Marine and RV Water Pumps - 0.75 Liter # SE38FR has 1/2" MPT inlet and outlets. It does come with the barbed adapters so you will only need the Replacement Fitting for Seaflo Diaphragm Water Pumps - 1/2" FPT x 1/2" Barb - Qty 1 # SE43FR if one is lost or damaged.
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  • Can a Seaflo Accumulator Tank Be Installed With the Intake on Either Side
    The Seaflo Accumulator Tank # SE38FR installs anywhere in-line on the discharge side of the pump. It can be installed in any orientation, so it does not matter which side the intake goes on.
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  • Replacement For Shurflo 2088-403-144 Water Pump & Can it be Quieter
    We do have a replacement you can use for your Shurflo 2088-403-144 water pump, which is the HydroMax RV Fresh Water Pump - 12 Volt - 3 Gallons Per Minute - 55 psi # P25201. On its own the # P25201 won't be quieter, but what you can do is add an accumulator tank which will help lessen the noise by reducing the pump's cycling; for that I recommend the Seaflo Accumulator Tank # SE38FR.
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  • Will Antifreeze Affect RV Water Pump During Winterization
    Antifreeze would not be an issue with the Seaflo Accumulator Tank for Marine and RV Water Pumps - 0.75 Liter Item # SE38FR that you referenced. The pump would not be affected at all.
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  • Troubleshooting Low Water Pressure In An RV With A Pressure Regulator And Water Filter
    Since the water filter could become clogged with debris, sediment, etc. there is the possibility that this is causing the low pressure. You can replace the cartridge inside your filter with part # CAM40621 to see if this solves the issue. If not then it could be that the regulator is the issue and that you'll need to replace it with another like part # A01-1124VP. Regulators can fail over time or become clogged up internally so it wouldn't be out of the realm of possibility that this is...
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  • Is Accumulator Tank Needed for HydroMax RV Fresh Water Pump
    If you'd like you can use an accumulator tank with the HydroMax RV Fresh Water Pump - 12 Volt - 3 Gallons Per Minute - 55 psi # P25201. It has standard 1/2 inch fittings so you can use the Seaflo Accumulator Tank for Marine and RV Water Pumps # SE38FR. An accumulator tank is not needed, but is a nice convenience feature because it makes the water pump system quieter; it traps and absorbs water and air in the tank which lessens the noise. So while it is not necessary, it is a nice thing...
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  • Accumulator Tank For Cold Water Only System
    Yes, the Seaflo # SE38FR accumulator would be perfect for that purpose. It will reduce the number of off and on cycles at the pump, eliminating a lot of noise in the trailer.
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Do you have a question about this RV Water Pump?


Info for this part was:

Employee Lindsey S
Edited by:
Lindsey S
Employee Jeff D
Installed by:
Jeff D
Employee Adam E
Installed by:
Adam E
Employee Jameson C
Expert Research:
Jameson C
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Michael B
Updated by:
Michael B
Employee Sabrina W
Updated by:
Sabrina W
Employee Alexander C
Written by:
Alexander C

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