---
product_id: 180441009
title: "2 Gallon Pre-Pressurized Accumulator Expansion Tank – Reduces Pump Cycling, Smooth Water Flow, 87 PSI, 3/4\" MNPT, Compact Design for RV, Marine, Boat & Off-Grid Systems – 4-Year Warranty"
brand: "seaflo"
price: "$322"
currency: NZD
in_stock: true
reviews_count: 13
category: "Seaflo"
url: https://www.desertcart.nz/products/180441009-2-gallon-pre-pressurized-accumulator-expansion-tank-reduces-pump-cycling
store_origin: NZ
region: New Zealand
---

# 2 Gallon capacity for steady water flow 3/4" MNPT universal fitting for easy install 87 PSI max pressure for durability 2 Gallon Pre-Pressurized Accumulator Expansion Tank – Reduces Pump Cycling, Smooth Water Flow, 87 PSI, 3/4" MNPT, Compact Design for RV, Marine, Boat & Off-Grid Systems – 4-Year Warranty

**Brand:** seaflo
**Price:** $322
**Availability:** ✅ In Stock

## Summary

> 🚤 Elevate your water system game—smooth, silent, and built to last!

## Quick Answers

- **What is this?** 2 Gallon Pre-Pressurized Accumulator Expansion Tank – Reduces Pump Cycling, Smooth Water Flow, 87 PSI, 3/4" MNPT, Compact Design for RV, Marine, Boat & Off-Grid Systems – 4-Year Warranty by seaflo
- **How much does it cost?** $322 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nz](https://www.desertcart.nz/products/180441009-2-gallon-pre-pressurized-accumulator-expansion-tank-reduces-pump-cycling)

## Best For

- seaflo enthusiasts

## Why This Product

- Trusted seaflo brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Plug & Play Setup:** Pre-pressurized with Schrader valve for quick, tool-free pressure tuning.
- • **Whisper-Quiet Flow:** Dampens vibrations and water hammer for a peaceful, noise-free water experience.
- • **Compact Space-Saver:** Slim design fits tight spots in RVs, boats, and cabins without hassle.
- • **Pump Life Maximizer:** Reduces pump cycling to extend your system’s lifespan and save energy.
- • **Marine-Grade Durability:** Corrosion-resistant build withstands harsh saltwater and off-grid environments.

## Overview

The SEAFLO 2 Gallon Pre-Pressurized Accumulator Expansion Tank is engineered to reduce pump cycling and deliver consistent, smooth water flow in marine, RV, and off-grid systems. With a robust 87 PSI rating, universal 3/4" MNPT fittings, and a compact design, it ensures easy installation and long-lasting performance. Its pre-pressurized bladder and Schrader valve allow quick pressure adjustments, while corrosion-resistant materials guarantee durability in demanding environments. Backed by a 4-year warranty, it’s the smart upgrade for anyone seeking quieter operation, energy efficiency, and reliable water pressure.

## Description

desertcart.com: SEAFLO 2 Gallon Pre-Pressurized Accumulator Expansion Tank – Reduces Pump Cycling, Smooth Water Flow, 87 PSI, 3/4" MNPT, Compact Design for RV, Marine, Boat & Off-Grid Systems – 4-Year Warranty : Tools & Home Improvement

Review: Good quality and reasonable price. - Quick delivery and very good quality, works great!
Review: Perfect replacement/upgrade for Jabsco 12573-2000 - I wish you could give bonus stars! The old jabsco 12573-2000 accumulator sprung a leak and I don’t think they make that model anymore and I REALLY didn't want to change styles, sizes, or drill new holes. I found this for an absolute bargain compared to the closest jabsco replacement and hoped it would work as it looked identical in size and shape from the picture to the old one. Not only was it physically the same size but even the screw holes lined up exactly the same. The fact that it even has rubber isolators in those screw holes was icing on the cake. The fittings are the easy to use plastic hand screw wingnut style and are extra long. I was concerned about the length difference but when I went to take the old accumulator out, the hoses were stuck. No problem! With the longer fittings I simply cut the hoses off at the old fittings and popped them right on the new ones. It’s like the person that designed this had actually done the job before. If you’ve done any work on a boat, you can greatly appreciate all of those details that make the job that much easier. The standard valve stem and bladder system are an upgrade over the old one as well. All in, it took me longer to gather and lay out all of the tools I was expecting to have to use than to actually replace this part. I want to say it was maybe 10 minutes. If you are in the same boat as I was, do yourself a favor and buy this!

## Features

- [ SPECIFICATIONS ]: Model: | Volume: 2 Gallon (8L) | Max Pressure: 87 PSI (6 Bar) | SFAT-087-021-01Connections: 3/4" MNPT | Valve Type: Schrader Air Valve (Bicycle Pump Compatible) | Dimensions: Compact Design | Warranty: 4-Year Limited
- [ REDUCES PUMP CYCLING FOR EXTENDED LIFESPAN ]: Significantly reduces frequent pump cycling, minimizing wear and tear on your water pump. This optimized operation enhances your pump’s lifespan, conserves battery power, and delivers steady, reliable performance for marine, RV, off-grid, and cabin water systems.
- [ CONSISTENT, SMOOTH WATER FLOW ]: Effectively absorbs pressure fluctuations and water hammer, providing steady, uninterrupted water flow to all fixtures. Enjoy consistent pressure and quieter operation in showers, sinks, and faucets in your boat, RV, or off-grid cabin.
- [ PRE-PRESSURIZED FOR QUICK & EASY SETUP ]: This tank arrives pre-pressurized, simplifying your installation process. Easily fine-tune internal air pressure using the integrated Schrader air valve, perfectly matching your system’s pump cut-in pressure to achieve optimal efficiency and reduced pump cycling.
- [ HIGH-PRESSURE DURABLE CONSTRUCTION ]: Designed to reliably withstand pressures up to 87 PSI (6 Bar), the accumulator tank features rugged construction with a protective corrosion-resistant coating, ideal for marine conditions, saltwater environments, and outdoor off-grid installations.
- [ UNIVERSAL INSTALLATION WITH 3/4" MNPT CONNECTION ]: Equipped with universal 3/4" MNPT inlet/outlet fitting for rapid, hassle-free integration into your existing plumbing system. Its compact, space-saving design allows for easy mounting in tight compartments aboard RVs, boats, or cabins.
- [ QUIET OPERATION WITH NOISE & VIBRATION REDUCTION ]: Dampens vibrations, eliminating disruptive pump noise and water hammer. Provides an ultra-quiet, stable operation, significantly enhancing your comfort and tranquility aboard boats, RVs, motorhomes, and in remote cabins.
- [ OPTIMIZES ENERGY EFFICIENCY IN OFF-GRID SYSTEMS ]: Reduces the frequency of pump activation, thereby conserving battery power, ideal for solar-powered setups, RVs, boats, and off-grid installations. Enhances overall system efficiency, reducing electricity consumption and maintenance.
- [ BUILT-IN SCHRADER VALVE FOR PRESSURE ADJUSTMENTS ]: Features an easy-access Schrader air valve at the top of the tank for quick and precise internal air pressure adjustments. Simply use a standard bicycle pump to adjust pressure, ensuring efficient, tailored performance and reduced cycling.
- [ 4-YEAR LIMITED WARRANTY ]: Backed confidently by SEAFLO’s industry-leading 4-Year Warranty, ensuring long-term durability, reliable performance, and complete satisfaction for your marine, RV, caravan, and off-grid water system applications.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B082DKMYLT |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #20,459 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #6 in Water Pump Accessories |
| Brand | SEAFLO |
| Color | Blue |
| Customer Reviews | 4.6 4.6 out of 5 stars (1,904) |
| Date First Available | January 30, 2018 |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 4.4 pounds |
| Item model number | SFAT-087-021-01 |
| Manufacturer | SEAFLO |
| Material | Polypropylene (PP), Stainless Steel |
| Part Number | SFAT-087-021-01 |
| Power Source | Battery Powered |
| Product Dimensions | 7.87"L x 7.87"W x 13"H |
| Style | 2 Gal (8 L) |
| UPC | 793945657568 647336948387 |

## Product Details

- **Brand:** SEAFLO
- **Color:** Blue
- **Item Weight:** 4.4 Pounds
- **Manufacturer:** SEAFLO
- **Material:** Polypropylene (PP), Stainless Steel
- **Power Source:** Battery Powered
- **Product Dimensions:** 7.87"L x 7.87"W x 13"H
- **Style:** 2 Gal (8 L)
- **UPC:** 793945657568 647336948387

## Images

![2 Gallon Pre-Pressurized Accumulator Expansion Tank – Reduces Pump Cycling, Smooth Water Flow, 87 PSI, 3/4" MNPT, Compact Design for RV, Marine, Boat & Off-Grid Systems – 4-Year Warranty - Image 1](https://m.media-amazon.com/images/I/61Uk+5VvHHL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good quality and reasonable price.
*by J***S on January 31, 2026*

Quick delivery and very good quality, works great!

### ⭐⭐⭐⭐⭐ Perfect replacement/upgrade for Jabsco 12573-2000
*by L***Y on December 2, 2025*

I wish you could give bonus stars! The old jabsco 12573-2000 accumulator sprung a leak and I don’t think they make that model anymore and I REALLY didn't want to change styles, sizes, or drill new holes. I found this for an absolute bargain compared to the closest jabsco replacement and hoped it would work as it looked identical in size and shape from the picture to the old one. Not only was it physically the same size but even the screw holes lined up exactly the same. The fact that it even has rubber isolators in those screw holes was icing on the cake. The fittings are the easy to use plastic hand screw wingnut style and are extra long. I was concerned about the length difference but when I went to take the old accumulator out, the hoses were stuck. No problem! With the longer fittings I simply cut the hoses off at the old fittings and popped them right on the new ones. It’s like the person that designed this had actually done the job before. If you’ve done any work on a boat, you can greatly appreciate all of those details that make the job that much easier. The standard valve stem and bladder system are an upgrade over the old one as well. All in, it took me longer to gather and lay out all of the tools I was expecting to have to use than to actually replace this part. I want to say it was maybe 10 minutes. If you are in the same boat as I was, do yourself a favor and buy this!

### ⭐⭐⭐⭐⭐ well made accumulator tank for your RV
*by E***3 on February 1, 2025*

I bought this accumulator to try and stop the pulsations of the water pump in my RV. They have smaller versions of this that are about a quart in size. I chose to go with the 2 gallon one. it is obviously larger and takes a little more room in a cabinet but so worth it. Installation was not to difficult, except for working in a cabinet. You will need to buy some pipe fittings to install it also. it worked so good, no more pulsations in the water, just like home. They pump does run longer when the pressure in the tank drops to the cut in point however it does not run as often and turn off and on rapidly with lower water flows. I highly recommend one of these for your RV

## Frequently Bought Together

- SEAFLO 2 Gallon Pre-Pressurized Accumulator Expansion Tank – Reduces Pump Cycling, Smooth Water Flow, 87 PSI, 3/4" MNPT, Compact Design for RV, Marine, Boat & Off-Grid Systems – 4-Year Warranty
- SEAFLO 55-Series Industrial Water Pressure Pump w/Power Plug for Wall Outlet - 115VAC, 5.0 GPM, 60 PSI | Self-Priming, Heavy Duty, Quiet Operation | Ideal for RV, Boat, Off-Grid, and Industrial Use
- SEAFLO 33-Series Water Pressure Pump - 115V AC, 3.3 GPM, 45 PSI, Self Priming, Smart Pressure Switch, UL & CSA Certified, for RV, Caravan, Off-Grid, Marine, and Industrial Use

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*Product available on Desertcart New Zealand*
*Store origin: NZ*
*Last updated: 2026-02-10*