---
product_id: 302438812
title: "attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire"
brand: "attwood"
price: "A$306"
currency: AUD
in_stock: true
reviews_count: 5
url: https://www.desertcart.com.au/products/302438812-attwood4511-7-sahara-s1100-automatic-bilge-pump-1100-gph-12
store_origin: AU
region: Australia
---

# 1100 GPH Power 12V Efficiency Compact Design attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire

**Brand:** attwood
**Price:** A$306
**Availability:** ✅ In Stock

## Summary

> 🚀 Elevate Your Boating Experience with Effortless Water Management!

## Quick Answers

- **What is this?** attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire by attwood
- **How much does it cost?** A$306 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.au](https://www.desertcart.com.au/products/302438812-attwood4511-7-sahara-s1100-automatic-bilge-pump-1100-gph-12)

## Best For

- attwood enthusiasts

## Why This Product

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

## Key Features

- • **🔧 Easy Installation:** Quickly installs in tight spaces with a horizontal mount, making setup a breeze.
- • **🔒 Durable & Reliable:** Includes a mercury-free switch and robust components for long-lasting performance.
- • **🌊 Automatic Operation:** Meets automatic switch pump requirements for vessels 20 feet and over, ensuring peace of mind.
- • **📏 Versatile Compatibility:** Compatible with 1-1/8” interior diameter hoses, making it adaptable for various setups.
- • **🚤 High Capacity Performance:** Effortlessly pumps 1100 gallons per hour, perfect for larger recreational boats.

## Overview

The Attwood 4511-7 Sahara S1100 Automatic Bilge Pump is engineered for larger recreational boats, delivering a powerful 1100 GPH flow rate. Designed for easy installation and reliable operation, this compact pump features a durable build, automatic switch compliance, and comes with all necessary components for a hassle-free setup.

## Description

attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire

## Features

- Reliably provides bilge water pumping for larger recreational boats
- Meets automatic switch pump requirements for any vessels 20 feet and over with sleeping accommodations
- High capacity for larger boats and yachts
- Compact and durable package includes pump, wire seals, strainer, and mercury-free switch in one unit
- Installs quickly and easily in tight spaces, mounts horizontally only.12-volt, 1.5-amp draw pump is rated for 1100 GPH performance at open flow (at voltage of 13.6 volts DC).Comes with a 29-inch length of 16-gauge caulked and tinned copper wire, and uses a 1-1/8”-inch interior diameter hose

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Attwood |
| Part number | 4511-7 |
| Item Weight | 499 g |
| Product Dimensions | 18.87 x 27.76 x 21.89 cm; 498.95 g |
| Item model number | 4511-7 |
| Size | One size |
| Color | Unspecified |
| Style | S1100 |
| Material | Other |
| Pattern | Bilge Pump |
| Power source type | Corded Electric |
| Voltage | 13.6 Volts |
| Item Package Quantity | 1 |
| Flow Rate | 18.33 Gallons Per Minute |
| Specific uses | personal |
| Included components | End Product & Information |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Brand:** attwood
- **Color:** White
- **Material:** Plastic
- **Style:** S1100
- **Product Dimensions:** 7.43"L x 10.93"W x 8.62"H
- **Power Source:** Corded Electric
- **Item Weight:** 1.1 Pounds
- **Maximum Flow Rate:** 18.33 Gallons Per Minute
- **Maximum Lifting Height:** 3.3 Feet
- **Voltage:** 13.6 Volts

## Images

![attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire - Image 1](https://m.media-amazon.com/images/I/71D8Tqi74bL.jpg)
![attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire - Image 2](https://m.media-amazon.com/images/I/71n6sw9OdXL.jpg)
![attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire - Image 3](https://m.media-amazon.com/images/I/71ONOxsTyIL.jpg)
![attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire - Image 4](https://m.media-amazon.com/images/I/71W9vcQxuaL.jpg)
![attwood4511-7 Sahara S1100 Automatic Bilge Pump, 1100 GPH, 12-Volt, 1.5-Amp Draw, ¾-Inch Interior Diameter Hose, 29-Inch Wire - Image 5](https://m.media-amazon.com/images/I/713krHOUCFL.jpg)

## Available Options

This product comes in different **Pattern Name, Style** options.

## Questions & Answers

**Q: What is the hose outlet size? Title says 3/4", description says 1-1/8", comments say both...**
A: The 500 and 750 use 3/4 and the 1100 uses 1-1/8 inch.

**Q: Do these bilge pumps run for a period of time after all water is pumped from bildge?**
A: This pump does NOT continue to run for a period of time. As soon as the float switch drops (water falls below the thresh-hold necessary to keep the float switch raised) the pump stops.

**Q: the sahara has two versions of the auto pump 1100? 1100 and S1100, why is the S1100 more expensive?**
A: It is my understanding that while the S1100 is indeed a model, one of Attwood’s more powerful bilge pumps, the 1100 refers to that models GPH ( gallons per hour). 
I am unable to locate an 1100 model. 
Hope this helps.

**Q: The model advertised is S1100 but pictured is S750.  Which pump is it?**
A: The S1100 is 1100 GPM. Mine has been in service for about 3 years with no problems. The only negative is that the water level has to get about halh way up the pump before the internal float switchs on the pump.

## Customer Reviews

### ⭐⭐⭐⭐⭐ 







  
  
    Very reliable pump
  

*by D***R on Reviewed in the United States on 31 May 2024*

I just purchased a replacement for my 12 year old Sahara S500 bilge pump.  The old one quit working automatically but still works with the manual switch after 12 years of service.  This is on a boat kept in a marina and it has to pump out rain water regularly.  I even had a leak for a few months and it had to kick on every few hours.  I am very impressed with its longevity and purchase the same model to replace it.

### ⭐⭐⭐⭐⭐ 







  
  
    No issues after a year
  

*by A***N on Reviewed in the United States on 29 March 2024*

Works perfect, starts when submerged. Made it into a mobile one for a backup on the boat

### ⭐⭐⭐⭐⭐ 







  
  
    Fit & Worked
  

*by A***N on Reviewed in the United States on 20 February 2024*

Perfect replacement pump for shower collector sump. Worked fine - easy to install.

## Frequently Bought Together

- Attwood 4505-7 Sahara S500 Automatic
- attwood Tsunami Aerator Pump
- Attwood Sahara MK2 Automatic Bilge Pump

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*Product available on Desertcart Australia*
*Store origin: AU*
*Last updated: 2026-03-06*