£111.21

It has never been this cheap. We have no record of a lower price.

£111 today · cheaper than every other day in the last 3 months

Rule RM800B 12V Automatic Bilge Pump - 800GPH Submersible

View at Amazon

Price History & Forecast

Grey patches = out of stock. Cheaper = lower on the chart. Hover for exact prices.

Last 50 days · 50 data points (no recent data)

Historical
Generating forecast…
£111.92 £111.14 £111.31 £111.48 £111.65 £111.82 £111.99 11 August 2026 23 August 2026 04 September 2026 16 September 2026 29 September 2026
View at Amazon ↗

One, RM800B

Price data last checked 41 day(s) ago - refreshing...

NEW HERE?

Amazon shows you one price. We show you all of them.

Tosheroon watches Amazon prices so you don't have to. Every product on Amazon has a price history — we make it visible. Set the price you'd actually pay, and we'll email you the second it gets there. No app, no account, one email.

WHAT'S ON THIS PAGE

↑ Price chart
when this has been cheap or pricey
↑ Forecast
where the price is heading next
↓ Statistics
all-time high & low, recent range
↑ Price alert
name your number, we'll email you

Price Distribution

Price distribution over 50 days • 2 price levels

Days at Price
Current Price
46 days · current 4 days 0 12 23 35 46 £111 £112 Days at Price

Price Analysis

Most common price: £111 (46 days, 92.0%)

Price range: £111 - £112

Price levels: 2 different prices over 50 days

Description

Keep your vessel dry and safe with the Rule RM800B Automatic Submersible Bilge Pump. Engineered for efficiency, this 12V pump delivers up to 10% more water flow than previous models while maintaining the same amperage. This means you get faster drainage without increasing energy consumption, making it an ideal choice for maintaining a dry boat environment. Safety is built into every aspect of this pump. The advanced Auto Sense Intelligence provides true hands-free operation by automatically activating at 5 cm and shutting off at .09 cm. For added security, the system includes a reliable backup mode that activates if the sensor becomes blocked, ensuring your boat remains protected. Designed with a compact footprint, the RM800B fits easily into tight spaces common in boat plumbing. The threaded discharge and thermal cut-off protection provide a reliable, easy-to-install solution for boat owners who value peace of mind on the water. Whether you are managing routine drainage or unexpected water accumulation, this pump offers the smart technology needed for dependable performance.

Key Features

Enhanced Water Flow: Delivers up to 10% more water flow than previous models using the same amperage for quicker, more efficient drainage.

Smart Auto Activation: Features Auto Sense Intelligence that activates at 5 cm and shuts off at .09 cm for reliable hands-free operation.

Reliable Backup System: Includes a built-in backup mode that triggers if the sensor becomes blocked to prevent flooding.

Compact and Easy Install: Designed with a compact shape for tight spaces and features a threaded discharge for simple installation.

Safety Protections: Equipped with a thermal cut-off to protect the motor and ensure long-term reliability on the water.

Product Specifications

Brand
Rule
Model
RM800B
Colour
One
Size
800
Domain
Amazon UK
Release Date
01 January 2024
Listed Since
01 January 2024

Barcode

No barcode data available

Similar Products You Might Like

Rule RM1100B Rule Mate 1100GPH 12V Level Sensing Bilge Pump
99% match

Rule RM1100B Rule Mate 1100GPH 12V Level Sensing Bilge Pump

Rule

£122.50 03 Nov 2026
Rule RM500B Rule-Mate Automatic Submersible Bilge Pump, 12V - 500GPH (32LPM)
99% match

Rule RM500B Rule-Mate Automatic Submersible Bilge Pump, 12V - 500GPH (32LPM)

Rule

£88.67 02 Nov 2026
Rule 25SA Automatic Submersible Bilge Pump, 12V - 500 GPH (31 LPM)
99% match

Rule 25SA Automatic Submersible Bilge Pump, 12V - 500 GPH (31 LPM)

Rule

£93.99 28 Oct 2026
Rule 10 Marine Bilge Pump - 2000 GPH, 12V DC, Non-Automatic
98% match

Rule 10 Marine Bilge Pump - 2000 GPH, 12V DC, Non-Automatic

Rule

£110.32 30 Aug 2026
Rule RM1500A Automated Bilge Pump - 1500 GPH 12V
98% match

Rule RM1500A Automated Bilge Pump - 1500 GPH 12V

Rule

£150.17 07 Nov 2026
Rule LP900S LoPro Bilge Pump - 900 GPH Automatic - Beige
98% match

Rule LP900S LoPro Bilge Pump - 900 GPH Automatic - Beige

Rule

£85.87 28 Oct 2026
Rule 1100 GPH 27DA Standard Bilge Pump - Blue
98% match

Rule 1100 GPH 27DA Standard Bilge Pump - Blue

Rule

£46.99 13 Oct 2026
Rule 03 Bilge Pump - 1500 GPH 24V Non-Automatic Marine Pump
98% match

Rule 03 Bilge Pump - 1500 GPH 24V Non-Automatic Marine Pump

Rule

£112.99 07 Nov 2026
Rule 04 1500 Old Series Non-Automatic Submersible 12V DC Bilge Pump
98% match

Rule 04 1500 Old Series Non-Automatic Submersible 12V DC Bilge Pump

Rule

£66.13 30 Oct 2026
Rule 2000 GPH 12V Non-Automatic Bilge Pump - Marine Grade
98% match

Rule 2000 GPH 12V Non-Automatic Bilge Pump - Marine Grade

Rule

Price unavailable
Rule RM2000A Automated Bilge Pump - 2000 GPH 12V White/Blue
98% match

Rule RM2000A Automated Bilge Pump - 2000 GPH 12V White/Blue

Rule

£249.99 25 Aug 2026
Rule 09 Gold Series Bilge Pump - 2000 GPH Water Drainage
98% match

Rule 09 Gold Series Bilge Pump - 2000 GPH Water Drainage

Rule

£196.71 06 Nov 2026
Seaflo 06 Series 750GPH Automatic Bilge Pump - 12V Marine
98% match

Seaflo 06 Series 750GPH Automatic Bilge Pump - 12V Marine

Seaflo

£23.99 31 Aug 2026
Whale BP4402 Gusher Titan Manual Bilge Pump, On-Deck, up to 28 GPM Flow Rate, 1 ½-Inch Hose Connections, for Boats Over 40 Feet, Black/Blue, One Size
98% match

Whale BP4402 Gusher Titan Manual Bilge Pump, On-Deck, up to 28 GPM Flow Rate, 1 ½-Inch Hose Connections, for Boats Over 40 Feet, Black/Blue, One Size

Whale

£123.30 25 Aug 2026
Rule RM1100B-24 Rule-Mate Automatic Submersible Bilge Pump, 24V - 1100GPH (69LPM)
98% match

Rule RM1100B-24 Rule-Mate Automatic Submersible Bilge Pump, 24V - 1100GPH (69LPM)

Rule

£127.57 14 Oct 2026
Rule 24DA Standard Bilge Pump - 12V Submersible Marine Pump
98% match

Rule 24DA Standard Bilge Pump - 12V Submersible Marine Pump

Rule

£23.40 17 Oct 2026
Whale BP9013 Gusher Urchin Manual Bilge Pump - 14.5 GPM
97% match

Whale BP9013 Gusher Urchin Manual Bilge Pump - 14.5 GPM

Whale

£96.06 17 Oct 2026
Jabsco 23680-4003 Water Puppy 12V Bronze Head Marine Pump
97% match

Jabsco 23680-4003 Water Puppy 12V Bronze Head Marine Pump

Jabsco

£193.49 15 Sep 2026
Rule 27DA-24 Marine Bilge Pump, Non-Automatic, 1100 GPH, 24 Volt
97% match

Rule 27DA-24 Marine Bilge Pump, Non-Automatic, 1100 GPH, 24 Volt

Rule

£63.27 10 Oct 2026
Whale BP9005 Gusher Urchin Manual Bilge Pump - 43LPM
97% match

Whale BP9005 Gusher Urchin Manual Bilge Pump - 43LPM

Whale

£62.85 15 Sep 2026
attwood FOR WATER forwater Trigger Automatic Bilge Pump 12 V
97% match

attwood FOR WATER forwater Trigger Automatic Bilge Pump 12 V

attwood

£10.25 13 Oct 2026
Rule In Line Marine Bilge Blower, Slip On Connections, Efficient and Quiet High Volume Air Flow,3 inch
97% match

Rule In Line Marine Bilge Blower, Slip On Connections, Efficient and Quiet High Volume Air Flow,3 inch

Rule

£42.68 14 Oct 2026
Valex ES700A Automatic Submersible Electric Pump for Clear Waters, Battery Operated Bilge Pump 12 V
96% match

Valex ES700A Automatic Submersible Electric Pump for Clear Waters, Battery Operated Bilge Pump 12 V

Valex

Price unavailable
Whale Electronic Automatic Switch 12/24 V 59354
96% match

Whale Electronic Automatic Switch 12/24 V 59354

Whale

£42.49 01 Sep 2026